text: # Licensed under the GPL: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
  # For details: https://github.com/PyCQA/pylint/blob/main/LICENSE
  
  import collections
  import contextlib
  import functools
  import operator
  import os
  import sys
  import tokenize
  import traceback
  import warnings
  from io import TextIOWrapper
  
  import astroid
  
  from pylint import checkers, config, exceptions, interfaces, reporters
  from pylint.constants import MAIN_CHECKER_NAME, MSG_TYPES
  from pylint.lint.expand_modules import expand_modules
  from pylint.lint.parallel import check_parallel
  from pylint.lint.report_functions import (
      report_messages_by_module_stats,
      report_messages_stats,
      report_total_messages_stats,
  )
  from pylint.lint.utils import fix_import_path
  from pylint.message import MessageDefinitionStore, MessagesHandlerMixIn
  from pylint.reporters.ureports import nodes as report_nodes
  from pylint.utils import ASTWalker, FileState, utils
  from pylint.utils.pragma_parser import (
      OPTION_PO,
      InvalidPragmaError,
      UnRecognizedOptionError,
      parse_pragma,
  )
  
  MANAGER = astroid.MANAGER
  
  
  def _read_stdin():
      # https://mail.python.org/pipermail/python-list/2012-November/634424.html
      sys.stdin = TextIOWrapper(sys.stdin.detach(), encoding="utf-8")
      return sys.stdin.read()
  
  
  def _load_reporter_by_class(reporter_class: str) -> type:
      qname = reporter_class
      module_part = astroid.modutils.get_module_part(qname)
      module = astroid.modutils.load_module_from_name(module_part)
      class_name = qname.split(".")[-1]
      return getattr(module, class_name)
  
  
  # Python Linter class #########################################################
  
  MSGS = {
      "F0001": (
          "%s",
          "fatal",
          "Used when an error occurred preventing the analysis of a \
                module (unable to find it for instance).",
      ),
      "F0002": (
          "%s: %s",
          "astroid-error",
          "Used when an unexpected error occurred while building the "
          "Astroid  representation. This is usually accompanied by a "
          "traceback. Please report such errors !",
      ),
      "F0010": (
          "error while code parsing: %s",
          "parse-error",
          "Used when an exception occurred while building the Astroid "
          "representation which could be handled by astroid.",
      ),
      "I0001": (
          "Unable to run raw checkers on built-in module %s",
          "raw-checker-failed",
          "Used to inform that a built-in module has not been checked "
          "using the raw checkers.",
      ),
      "I0010": (
          "Unable to consider inline option %r",
          "bad-inline-option",
          "Used when an inline option is either badly formatted or can't "
          "be used inside modules.",
      ),
      "I0011": (
          "Locally disabling %s (%s)",
          "locally-disabled",
          "Used when an inline option disables a message or a messages category.",
      ),
      "I0013": (
          "Ignoring entire file",
          "file-ignored",
          "Used to inform that the file will not be checked",
      ),
      "I0020": (
          "Suppressed %s (from line %d)",
          "suppressed-message",
          "A message was triggered on a line, but suppressed explicitly "
          "by a disable= comment in the file. This message is not "
          "generated for messages that are ignored due to configuration "
          "settings.",
      ),
      "I0021": (
          "Useless suppression of %s",
          "useless-suppression",
          "Reported when a message is explicitly disabled for a line or "
          "a block of code, but never triggered.",
      ),
      "I0022": (
          'Pragma "%s" is deprecated, use "%s" instead',
          "deprecated-pragma",
          "Some inline pylint options have been renamed or reworked, "
          "only the most recent form should be used. "
          "NOTE:skip-all is only available with pylint >= 0.26",
          {"old_names": [("I0014", "deprecated-disable-all")]},
      ),
      "E0001": ("%s", "syntax-error", "Used when a syntax error is raised for a module."),
      "E0011": (
          "Unrecognized file option %r",
          "unrecognized-inline-option",
          "Used when an unknown inline option is encountered.",
      ),
      "E0012": (
          "Bad option value %r",
          "bad-option-value",
          "Used when a bad value for an inline option is encountered.",
      ),
      "E0013": (
          "Plugin '%s' is impossible to load, is it installed ? ('%s')",
          "bad-plugin-value",
          "Used when a bad value is used in 'load-plugins'.",
      ),
  }
  
  
  # pylint: disable=too-many-instance-attributes,too-many-public-methods
  class PyLinter(
      config.OptionsManagerMixIn,
      MessagesHandlerMixIn,
      reporters.ReportsHandlerMixIn,
      checkers.BaseTokenChecker,
  ):
      """lint Python modules using external checkers.
  
      This is the main checker controlling the other ones and the reports
      generation. It is itself both a raw checker and an astroid checker in order
      to:
      * handle message activation / deactivation at the module level
      * handle some basic but necessary stats'data (number of classes, methods...)
  
      IDE plugin developers: you may have to call
      `astroid.builder.MANAGER.astroid_cache.clear()` across runs if you want
      to ensure the latest code version is actually checked.
  
      This class needs to support pickling for parallel linting to work. The exception
      is reporter member; see check_parallel function for more details.
      """
  
      __implements__ = (interfaces.ITokenChecker,)
  
      name = MAIN_CHECKER_NAME
      priority = 0
      level = 0
      msgs = MSGS
  
      @staticmethod
      def make_options():
          return (
              (
                  "ignore",
                  {
                      "type": "csv",
                      "metavar": "<file>[,<file>...]",
                      "dest": "black_list",
                      "default": ("CVS",),
                      "help": "Files or directories to be skipped. "
                      "They should be base names, not paths.",
                  },
              ),
              (
                  "ignore-patterns",
                  {
                      "type": "regexp_csv",
                      "metavar": "<pattern>[,<pattern>...]",
                      "dest": "black_list_re",
                      "default": (),
                      "help": "Files or directories matching the regex patterns are"
                      " skipped. The regex matches against base names, not paths.",
                  },
              ),
              (
                  "ignore-paths",
                  {
                      "type": "regexp_csv",
                      "metavar": "<pattern>[,<pattern>...]",
                      "dest": "ignore_list_paths_re",
                      "default": (),
                      "help": "Add files or directories matching the regex patterns to the"
                      " ignore-list. The regex matches against paths.",
                  },
              ),
              (
                  "persistent",
                  {
                      "default": True,
                      "type": "yn",
                      "metavar": "<y_or_n>",
                      "level": 1,
                      "help": "Pickle collected data for later comparisons.",
                  },
              ),
              (
                  "load-plugins",
                  {
                      "type": "csv",
                      "metavar": "<modules>",
                      "default": (),
                      "level": 1,
                      "help": "List of plugins (as comma separated values of "
                      "python module names) to load, usually to register "
                      "additional checkers.",
                  },
              ),
              (
                  "output-format",
                  {
                      "default": "text",
                      "type": "string",
                      "metavar": "<format>",
                      "short": "f",
                      "group": "Reports",
                      "help": "Set the output format. Available formats are text,"
                      " parseable, colorized, json and msvs (visual studio)."
                      " You can also give a reporter class, e.g. mypackage.mymodule."
                      "MyReporterClass.",
                  },
              ),
              (
                  "reports",
                  {
                      "default": False,
                      "type": "yn",
                      "metavar": "<y_or_n>",
                      "short": "r",
                      "group": "Reports",
                      "help": "Tells whether to display a full report or only the "
                      "messages.",
                  },
              ),
              (
                  "evaluation",
                  {
                      "type": "string",
                      "metavar": "<python_expression>",
                      "group": "Reports",
                      "level": 1,
                      "default": "10.0 - ((float(5 * error + warning + refactor + "
                      "convention) / statement) * 10)",
                      "help": "Python expression which should return a score less "
                      "than or equal to 10. You have access to the variables "
                      "'error', 'warning', 'refactor', and 'convention' which "
                      "contain the number of messages in each category, as well as "
                      "'statement' which is the total number of statements "
                      "analyzed. This score is used by the global "
                      "evaluation report (RP0004).",
                  },
              ),
              (
                  "score",
                  {
                      "default": True,
                      "type": "yn",
                      "metavar": "<y_or_n>",
                      "short": "s",
                      "group": "Reports",
                      "help": "Activate the evaluation score.",
                  },
              ),
              (
                  "fail-under",
                  {
                      "default": 10,
                      "type": "float",
                      "metavar": "<score>",
                      "help": "Specify a score threshold to be exceeded before program exits with error.",
                  },
              ),
              (
                  "fail-on",
                  {
                      "default": "",
                      "type": "csv",
                      "metavar": "<msg ids>",
                      "help": "Return non-zero exit code if any of these messages/categories are detected,"
                      " even if score is above --fail-under value. Syntax same as enable."
                      " Messages specified are enabled, while categories only check already-enabled messages.",
                  },
              ),
              (
                  "confidence",
                  {
                      "type": "multiple_choice",
                      "metavar": "<levels>",
                      "default": "",
                      "choices": [c.name for c in interfaces.CONFIDENCE_LEVELS],
                      "group": "Messages control",
                      "help": "Only show warnings with the listed confidence levels."
                      " Leave empty to show all. Valid levels: %s."
                      % (", ".join(c.name for c in interfaces.CONFIDENCE_LEVELS),),
                  },
              ),
              (
                  "enable",
                  {
                      "type": "csv",
                      "metavar": "<msg ids>",
                      "short": "e",
                      "group": "Messages control",
                      "help": "Enable the message, report, category or checker with the "
                      "given id(s). You can either give multiple identifier "
                      "separated by comma (,) or put this option multiple time "
                      "(only on the command line, not in the configuration file "
                      "where it should appear only once). "
                      'See also the "--disable" option for examples.',
                  },
              ),
              (
                  "disable",
                  {
                      "type": "csv",
                      "metavar": "<msg ids>",
                      "short": "d",
                      "group": "Messages control",
                      "help": "Disable the message, report, category or checker "
                      "with the given id(s). You can either give multiple identifiers "
                      "separated by comma (,) or put this option multiple times "
                      "(only on the command line, not in the configuration file "
                      "where it should appear only once). "
                      'You can also use "--disable=all" to disable everything first '
                      "and then reenable specific checks. For example, if you want "
                      "to run only the similarities checker, you can use "
                      '"--disable=all --enable=similarities". '
                      "If you want to run only the classes checker, but have no "
                      "Warning level messages displayed, use "
                      '"--disable=all --enable=classes --disable=W".',
                  },
              ),
              (
                  "msg-template",
                  {
                      "type": "string",
                      "metavar": "<template>",
                      "group": "Reports",
                      "help": (
                          "Template used to display messages. "
                          "This is a python new-style format string "
                          "used to format the message information. "
                          "See doc for all details."
                      ),
                  },
              ),
              (
                  "jobs",
                  {
                      "type": "int",
                      "metavar": "<n-processes>",
                      "short": "j",
                      "default": 1,
                      "help": "Use multiple processes to speed up Pylint. Specifying 0 will "
                      "auto-detect the number of processors available to use.",
                  },
              ),
              (
                  "unsafe-load-any-extension",
                  {
                      "type": "yn",
                      "metavar": "<yn>",
                      "default": False,
                      "hide": True,
                      "help": (
                          "Allow loading of arbitrary C extensions. Extensions"
                          " are imported into the active Python interpreter and"
                          " may run arbitrary code."
                      ),
                  },
              ),
              (
                  "limit-inference-results",
                  {
                      "type": "int",
                      "metavar": "<number-of-results>",
                      "default": 100,
                      "help": (
                          "Control the amount of potential inferred values when inferring "
                          "a single object. This can help the performance when dealing with "
                          "large functions or complex, nested conditions. "
                      ),
                  },
              ),
              (
                  "extension-pkg-allow-list",
                  {
                      "type": "csv",
                      "metavar": "<pkg[,pkg]>",
                      "default": [],
                      "help": (
                          "A comma-separated list of package or module names"
                          " from where C extensions may be loaded. Extensions are"
                          " loading into the active Python interpreter and may run"
                          " arbitrary code."
                      ),
                  },
              ),
              (
                  "extension-pkg-whitelist",
                  {
                      "type": "csv",
                      "metavar": "<pkg[,pkg]>",
                      "default": [],
                      "help": (
                          "A comma-separated list of package or module names"
                          " from where C extensions may be loaded. Extensions are"
                          " loading into the active Python interpreter and may run"
                          " arbitrary code. (This is an alternative name to"
                          " extension-pkg-allow-list for backward compatibility.)"
                      ),
                  },
              ),
              (
                  "suggestion-mode",
                  {
                      "type": "yn",
                      "metavar": "<yn>",
                      "default": True,
                      "help": (
                          "When enabled, pylint would attempt to guess common "
                          "misconfiguration and emit user-friendly hints instead "
                          "of false-positive error messages."
                      ),
                  },
              ),
              (
                  "exit-zero",
                  {
                      "action": "store_true",
                      "help": (
                          "Always return a 0 (non-error) status code, even if "
                          "lint errors are found. This is primarily useful in "
                          "continuous integration scripts."
                      ),
                  },
              ),
              (
                  "from-stdin",
                  {
                      "action": "store_true",
                      "help": (
                          "Interpret the stdin as a python script, whose filename "
                          "needs to be passed as the module_or_package argument."
                      ),
                  },
              ),
          )
  
      option_groups = (
          ("Messages control", "Options controlling analysis messages"),
          ("Reports", "Options related to output formatting and reporting"),
      )
  
      def __init__(self, options=(), reporter=None, option_groups=(), pylintrc=None):
          """Some stuff has to be done before ancestors initialization...
          messages store / checkers / reporter / astroid manager"""
          self.msgs_store = MessageDefinitionStore()
          self.reporter = None
          self._reporter_names = None
          self._reporters = {}
          self._checkers = collections.defaultdict(list)
          self._pragma_lineno = {}
          self._ignore_file = False
          # visit variables
          self.file_state = FileState()
          self.current_name = None
          self.current_file = None
          self.stats = None
          self.fail_on_symbols = []
          # init options
          self._external_opts = options
          self.options = options + PyLinter.make_options()
          self.option_groups = option_groups + PyLinter.option_groups
          self._options_methods = {"enable": self.enable, "disable": self.disable}
          self._bw_options_methods = {
              "disable-msg": self._options_methods["disable"],
              "enable-msg": self._options_methods["enable"],
          }
          MessagesHandlerMixIn.__init__(self)
          reporters.ReportsHandlerMixIn.__init__(self)
          super().__init__(
              usage=__doc__,
              config_file=pylintrc or next(config.find_default_config_files(), None),
          )
          checkers.BaseTokenChecker.__init__(self)
          # provided reports
          self.reports = (
              ("RP0001", "Messages by category", report_total_messages_stats),
              (
                  "RP0002",
                  "% errors / warnings by module",
                  report_messages_by_module_stats,
              ),
              ("RP0003", "Messages", report_messages_stats),
          )
          self.register_checker(self)
          self._dynamic_plugins = set()
          self._python3_porting_mode = False
          self._error_mode = False
          self.load_provider_defaults()
          if reporter:
              self.set_reporter(reporter)
  
      def load_default_plugins(self):
          checkers.initialize(self)
          reporters.initialize(self)
          # Make sure to load the default reporter, because
          # the option has been set before the plugins had been loaded.
          if not self.reporter:
              self._load_reporters()
  
      def load_plugin_modules(self, modnames):
          """take a list of module names which are pylint plugins and load
          and register them
          """
          for modname in modnames:
              if modname in self._dynamic_plugins:
                  continue
              self._dynamic_plugins.add(modname)
              try:
                  module = astroid.modutils.load_module_from_name(modname)
                  module.register(self)
              except ModuleNotFoundError:
                  pass
  
      def load_plugin_configuration(self):
          """Call the configuration hook for plugins
  
          This walks through the list of plugins, grabs the "load_configuration"
          hook, if exposed, and calls it to allow plugins to configure specific
          settings.
          """
          for modname in self._dynamic_plugins:
              try:
                  module = astroid.modutils.load_module_from_name(modname)
                  if hasattr(module, "load_configuration"):
                      module.load_configuration(self)
              except ModuleNotFoundError as e:
                  self.add_message("bad-plugin-value", args=(modname, e), line=0)
  
      def _load_reporters(self) -> None:
          sub_reporters = []
          output_files = []
          with contextlib.ExitStack() as stack:
              for reporter_name in self._reporter_names.split(","):
                  reporter_name, *reporter_output = reporter_name.split(":", 1)
  
                  reporter = self._load_reporter_by_name(reporter_name)
                  sub_reporters.append(reporter)
  
                  if reporter_output:
                      (reporter_output,) = reporter_output
  
                      # pylint: disable=consider-using-with
                      output_file = stack.enter_context(open(reporter_output, "w"))
  
                      reporter.set_output(output_file)
                      output_files.append(output_file)
  
              # Extend the lifetime of all opened output files
              close_output_files = stack.pop_all().close
  
          if len(sub_reporters) > 1 or output_files:
              self.set_reporter(
                  reporters.MultiReporter(
                      sub_reporters,
                      close_output_files,
                  )
              )
          else:
              self.set_reporter(sub_reporters[0])
  
      def _load_reporter_by_name(self, reporter_name: str) -> reporters.BaseReporter:
          name = reporter_name.lower()
          if name in self._reporters:
              return self._reporters[name]()
  
          try:
              reporter_class = _load_reporter_by_class(reporter_name)
          except (ImportError, AttributeError) as e:
              raise exceptions.InvalidReporterError(name) from e
          else:
              return reporter_class()
  
      def set_reporter(self, reporter):
          """set the reporter used to display messages and reports"""
          self.reporter = reporter
          reporter.linter = self
  
      def set_option(self, optname, value, action=None, optdict=None):
          """overridden from config.OptionsProviderMixin to handle some
          special options
          """
          if optname in self._options_methods or optname in self._bw_options_methods:
              if value:
                  try:
                      meth = self._options_methods[optname]
                  except KeyError:
                      meth = self._bw_options_methods[optname]
                      warnings.warn(
                          "%s is deprecated, replace it by %s"
                          % (optname, optname.split("-")[0]),
                          DeprecationWarning,
                      )
                  value = utils._check_csv(value)
                  if isinstance(value, (list, tuple)):
                      for _id in value:
                          meth(_id, ignore_unknown=True)
                  else:
                      meth(value)
                  return  # no need to call set_option, disable/enable methods do it
          elif optname == "output-format":
              self._reporter_names = value
              # If the reporters are already available, load
              # the reporter class.
              if self._reporters:
                  self._load_reporters()
  
          try:
              checkers.BaseTokenChecker.set_option(self, optname, value, action, optdict)
          except config.UnsupportedAction:
              print("option %s can't be read from config file" % optname, file=sys.stderr)
  
      def register_reporter(self, reporter_class):
          self._reporters[reporter_class.name] = reporter_class
  
      def report_order(self):
          reports = sorted(self._reports, key=lambda x: getattr(x, "name", ""))
          try:
              # Remove the current reporter and add it
              # at the end of the list.
              reports.pop(reports.index(self))
          except ValueError:
              pass
          else:
              reports.append(self)
          return reports
  
      # checkers manipulation methods ############################################
  
      def register_checker(self, checker):
          """register a new checker
  
          checker is an object implementing IRawChecker or / and IAstroidChecker
          """
          assert checker.priority <= 0, "checker priority can't be >= 0"
          self._checkers[checker.name].append(checker)
          for r_id, r_title, r_cb in checker.reports:
              self.register_report(r_id, r_title, r_cb, checker)
          self.register_options_provider(checker)
          if hasattr(checker, "msgs"):
              self.msgs_store.register_messages_from_checker(checker)
          checker.load_defaults()
  
          # Register the checker, but disable all of its messages.
          if not getattr(checker, "enabled", True):
              self.disable(checker.name)
  
      def enable_fail_on_messages(self):
          """enable 'fail on' msgs
  
          Convert values in config.fail_on (which might be msg category, msg id,
          or symbol) to specific msgs, then enable and flag them for later.
          """
          fail_on_vals = self.config.fail_on
          if not fail_on_vals:
              return
  
          fail_on_cats = set()
          fail_on_msgs = set()
          for val in fail_on_vals:
              # If value is a cateogry, add category, else add message
              if val in MSG_TYPES:
                  fail_on_cats.add(val)
              else:
                  fail_on_msgs.add(val)
  
          # For every message in every checker, if cat or msg flagged, enable check
          for all_checkers in self._checkers.values():
              for checker in all_checkers:
                  for msg in checker.messages:
                      if msg.msgid in fail_on_msgs or msg.symbol in fail_on_msgs:
                          # message id/symbol matched, enable and flag it
                          self.enable(msg.msgid)
                          self.fail_on_symbols.append(msg.symbol)
                      elif msg.msgid[0] in fail_on_cats:
                          # message starts with a cateogry value, flag (but do not enable) it
                          self.fail_on_symbols.append(msg.symbol)
  
      def any_fail_on_issues(self):
          return any(x in self.fail_on_symbols for x in self.stats["by_msg"])
  
      def disable_noerror_messages(self):
          for msgcat, msgids in self.msgs_store._msgs_by_category.items():
              # enable only messages with 'error' severity and above ('fatal')
              if msgcat in ["E", "F"]:
                  for msgid in msgids:
                      self.enable(msgid)
              else:
                  for msgid in msgids:
                      self.disable(msgid)
  
      def disable_reporters(self):
          """disable all reporters"""
          for _reporters in self._reports.values():
              for report_id, _, _ in _reporters:
                  self.disable_report(report_id)
  
      def error_mode(self):
          """error mode: enable only errors; no reports, no persistent"""
          self._error_mode = True
          self.disable_noerror_messages()
          self.disable("miscellaneous")
          if self._python3_porting_mode:
              self.disable("all")
              for msg_id in self._checker_messages("python3"):
                  if msg_id.startswith("E"):
                      self.enable(msg_id)
              config_parser = self.cfgfile_parser
              if config_parser.has_option("MESSAGES CONTROL", "disable"):
                  value = config_parser.get("MESSAGES CONTROL", "disable")
                  self.global_set_option("disable", value)
          else:
              self.disable("python3")
          self.set_option("reports", False)
          self.set_option("persistent", False)
          self.set_option("score", False)
  
      def python3_porting_mode(self):
          """Disable all other checkers and enable Python 3 warnings."""
          self.disable("all")
          # re-enable some errors, or 'print', 'raise', 'async', 'await' will mistakenly lint fine
          self.enable("fatal")  # F0001
          self.enable("astroid-error")  # F0002
          self.enable("parse-error")  # F0010
          self.enable("syntax-error")  # E0001
          self.enable("python3")
          if self._error_mode:
              # The error mode was activated, using the -E flag.
              # So we'll need to enable only the errors from the
              # Python 3 porting checker.
              for msg_id in self._checker_messages("python3"):
                  if msg_id.startswith("E"):
                      self.enable(msg_id)
                  else:
                      self.disable(msg_id)
          config_parser = self.cfgfile_parser
          if config_parser.has_option("MESSAGES CONTROL", "disable"):
              value = config_parser.get("MESSAGES CONTROL", "disable")
              self.global_set_option("disable", value)
          self._python3_porting_mode = True
  
      def list_messages_enabled(self):
          enabled = [
              f"  {message.symbol} ({message.msgid})"
              for message in self.msgs_store.messages
              if self.is_message_enabled(message.msgid)
          ]
          disabled = [
              f"  {message.symbol} ({message.msgid})"
              for message in self.msgs_store.messages
              if not self.is_message_enabled(message.msgid)
          ]
          print("Enabled messages:")
          for msg in sorted(enabled):
              print(msg)
          print("\nDisabled messages:")
          for msg in sorted(disabled):
              print(msg)
          print("")
  
      # block level option handling #############################################
      # see func_block_disable_msg.py test case for expected behaviour
  
      def process_tokens(self, tokens):
          """Process tokens from the current module to search for module/block level
          options."""
          control_pragmas = {"disable", "enable"}
          prev_line = None
          saw_newline = True
          seen_newline = True
          for (tok_type, content, start, _, _) in tokens:
              if prev_line and prev_line != start[0]:
                  saw_newline = seen_newline
                  seen_newline = False
  
              prev_line = start[0]
              if tok_type in (tokenize.NL, tokenize.NEWLINE):
                  seen_newline = True
  
              if tok_type != tokenize.COMMENT:
                  continue
              match = OPTION_PO.search(content)
              if match is None:
                  continue
              try:
                  for pragma_repr in parse_pragma(match.group(2)):
                      if pragma_repr.action in ("disable-all", "skip-file"):
                          if pragma_repr.action == "disable-all":
                              self.add_message(
                                  "deprecated-pragma",
                                  line=start[0],
                                  args=("disable-all", "skip-file"),
                              )
                          self.add_message("file-ignored", line=start[0])
                          self._ignore_file = True
                          return
                      try:
                          meth = self._options_methods[pragma_repr.action]
                      except KeyError:
                          meth = self._bw_options_methods[pragma_repr.action]
                          # found a "(dis|en)able-msg" pragma deprecated suppression
                          self.add_message(
                              "deprecated-pragma",
                              line=start[0],
                              args=(
                                  pragma_repr.action,
                                  pragma_repr.action.replace("-msg", ""),
                              ),
                          )
                      for msgid in pragma_repr.messages:
                          # Add the line where a control pragma was encountered.
                          if pragma_repr.action in control_pragmas:
                              self._pragma_lineno[msgid] = start[0]
  
                          if (pragma_repr.action, msgid) == ("disable", "all"):
                              self.add_message(
                                  "deprecated-pragma",
                                  line=start[0],
                                  args=("disable=all", "skip-file"),
                              )
                              self.add_message("file-ignored", line=start[0])
                              self._ignore_file = True
                              return
                              # If we did not see a newline between the previous line and now,
                              # we saw a backslash so treat the two lines as one.
                          l_start = start[0]
                          if not saw_newline:
                              l_start -= 1
                          try:
                              meth(msgid, "module", l_start)
                          except exceptions.UnknownMessageError:
                              self.add_message(
                                  "bad-option-value", args=msgid, line=start[0]
                              )
              except UnRecognizedOptionError as err:
                  self.add_message(
                      "unrecognized-inline-option", args=err.token, line=start[0]
                  )
                  continue
              except InvalidPragmaError as err:
                  self.add_message("bad-inline-option", args=err.token, line=start[0])
                  continue
  
      # code checking methods ###################################################
  
      def get_checkers(self):
          """return all available checkers as a list"""
          return [self] + [
              c
              for _checkers in self._checkers.values()
              for c in _checkers
              if c is not self
          ]
  
      def get_checker_names(self):
          """Get all the checker names that this linter knows about."""
          current_checkers = self.get_checkers()
          return sorted(
              {
                  checker.name
                  for checker in current_checkers
                  if checker.name != MAIN_CHECKER_NAME
              }
          )
  
      def prepare_checkers(self):
          """return checkers needed for activated messages and reports"""
          if not self.config.reports:
              self.disable_reporters()
          # get needed checkers
          needed_checkers = [self]
          for checker in self.get_checkers()[1:]:
              messages = {msg for msg in checker.msgs if self.is_message_enabled(msg)}
              if messages or any(self.report_is_enabled(r[0]) for r in checker.reports):
                  needed_checkers.append(checker)
          # Sort checkers by priority
          needed_checkers = sorted(
              needed_checkers, key=operator.attrgetter("priority"), reverse=True
          )
          return needed_checkers
  
      # pylint: disable=unused-argument
      @staticmethod
      def should_analyze_file(modname, path, is_argument=False):
          """Returns whether or not a module should be checked.
  
          This implementation returns True for all python source file, indicating
          that all files should be linted.
  
          Subclasses may override this method to indicate that modules satisfying
          certain conditions should not be linted.
  
          :param str modname: The name of the module to be checked.
          :param str path: The full path to the source code of the module.
          :param bool is_argument: Whether the file is an argument to pylint or not.
                                   Files which respect this property are always
                                   checked, since the user requested it explicitly.
          :returns: True if the module should be checked.
          :rtype: bool
          """
          if is_argument:
              return True
          return path.endswith(".py")
  
      # pylint: enable=unused-argument
  
      def initialize(self):
          """Initialize linter for linting
  
          This method is called before any linting is done.
          """
          # initialize msgs_state now that all messages have been registered into
          # the store
          for msg in self.msgs_store.messages:
              if not msg.may_be_emitted():
                  self._msgs_state[msg.msgid] = False
  
      def check(self, files_or_modules):
          """main checking entry: check a list of files or modules from their name.
  
          files_or_modules is either a string or list of strings presenting modules to check.
          """
  
          self.initialize()
  
          if not isinstance(files_or_modules, (list, tuple)):
              files_or_modules = (files_or_modules,)
  
          if self.config.from_stdin:
              if len(files_or_modules) != 1:
                  raise exceptions.InvalidArgsError(
                      "Missing filename required for --from-stdin"
                  )
  
              filepath = files_or_modules[0]
              with fix_import_path(files_or_modules):
                  self._check_files(
                      functools.partial(self.get_ast, data=_read_stdin()),
                      [self._get_file_descr_from_stdin(filepath)],
                  )
          elif self.config.jobs == 1:
              with fix_import_path(files_or_modules):
                  self._check_files(
                      self.get_ast, self._iterate_file_descrs(files_or_modules)
                  )
          else:
              check_parallel(
                  self,
                  self.config.jobs,
                  self._iterate_file_descrs(files_or_modules),
                  files_or_modules,
              )
  
      def check_single_file(self, name, filepath, modname):
          """Check single file
  
          The arguments are the same that are documented in _check_files
  
          The initialize() method should be called before calling this method
          """
          with self._astroid_module_checker() as check_astroid_module:
              self._check_file(
                  self.get_ast, check_astroid_module, name, filepath, modname
              )
  
      def _check_files(self, get_ast, file_descrs):
          """Check all files from file_descrs
  
          The file_descrs should be iterable of tuple (name, filepath, modname)
          where
          - name: full name of the module
          - filepath: path of the file
          - modname: module name
          """
          with self._astroid_module_checker() as check_astroid_module:
              for name, filepath, modname in file_descrs:
                  self._check_file(get_ast, check_astroid_module, name, filepath, modname)
  
      def _check_file(self, get_ast, check_astroid_module, name, filepath, modname):
          """Check a file using the passed utility functions (get_ast and check_astroid_module)
  
          :param callable get_ast: callable returning AST from defined file taking the following arguments
          - filepath: path to the file to check
          - name: Python module name
          :param callable check_astroid_module: callable checking an AST taking the following arguments
          - ast: AST of the module
          :param str name: full name of the module
          :param str filepath: path to checked file
          :param str modname: name of the checked Python module
          """
          self.set_current_module(name, filepath)
          # get the module representation
          ast_node = get_ast(filepath, name)
          if ast_node is None:
              return
  
          self._ignore_file = False
  
          self.file_state = FileState(modname)
          # fix the current file (if the source file was not available or
          # if it's actually a c extension)
          self.current_file = ast_node.file  # pylint: disable=maybe-no-member
          check_astroid_module(ast_node)
          # warn about spurious inline messages handling
          spurious_messages = self.file_state.iter_spurious_suppression_messages(
              self.msgs_store
          )
          for msgid, line, args in spurious_messages:
              self.add_message(msgid, line, None, args)
  
      @staticmethod
      def _get_file_descr_from_stdin(filepath):
          """Return file description (tuple of module name, file path, base name) from given file path
  
          This method is used for creating suitable file description for _check_files when the
          source is standard input.
          """
          try:
              # Note that this function does not really perform an
              # __import__ but may raise an ImportError exception, which
              # we want to catch here.
              modname = ".".join(astroid.modutils.modpath_from_file(filepath))
          except ImportError:
              modname = os.path.splitext(os.path.basename(filepath))[0]
  
          return (modname, filepath, filepath)
  
      def _iterate_file_descrs(self, files_or_modules):
          """Return generator yielding file descriptions (tuples of module name, file path, base name)
  
          The returned generator yield one item for each Python module that should be linted.
          """
          for descr in self._expand_files(files_or_modules):
              name, filepath, is_arg = descr["name"], descr["path"], descr["isarg"]
              if self.should_analyze_file(name, filepath, is_argument=is_arg):
                  yield (name, filepath, descr["basename"])
  
      def _expand_files(self, modules):
          """get modules and errors from a list of modules and handle errors"""
          result, errors = expand_modules(
              modules,
              self.config.black_list,
              self.config.black_list_re,
              self.config.ignore_list_paths_re,
          )
          for error in errors:
              message = modname = error["mod"]
              key = error["key"]
              self.set_current_module(modname)
              if key == "fatal":
                  message = str(error["ex"]).replace(os.getcwd() + os.sep, "")
              self.add_message(key, args=message)
          return result
  
      def set_current_module(self, modname, filepath=None):
          """set the name of the currently analyzed module and
          init statistics for it
          """
          if not modname and filepath is None:
              return
          self.reporter.on_set_current_module(modname, filepath)
          self.current_name = modname
          self.current_file = filepath or modname
          self.stats["by_module"][modname] = {}
          self.stats["by_module"][modname]["statement"] = 0
          for msg_cat in MSG_TYPES.values():
              self.stats["by_module"][modname][msg_cat] = 0
  
      @contextlib.contextmanager
      def _astroid_module_checker(self):
          """Context manager for checking ASTs
  
          The value in the context is callable accepting AST as its only argument.
          """
          walker = ASTWalker(self)
          _checkers = self.prepare_checkers()
          tokencheckers = [
              c
              for c in _checkers
              if interfaces.implements(c, interfaces.ITokenChecker) and c is not self
          ]
          rawcheckers = [
              c for c in _checkers if interfaces.implements(c, interfaces.IRawChecker)
          ]
          # notify global begin
          for checker in _checkers:
              checker.open()
              if interfaces.implements(checker, interfaces.IAstroidChecker):
                  walker.add_checker(checker)
  
          yield functools.partial(
              self.check_astroid_module,
              walker=walker,
              tokencheckers=tokencheckers,
              rawcheckers=rawcheckers,
          )
  
          # notify global end
          self.stats["statement"] = walker.nbstatements
          for checker in reversed(_checkers):
              checker.close()
  
      def get_ast(self, filepath, modname, data=None):
          """Return an ast(roid) representation of a module or a string.
  
          :param str filepath: path to checked file.
          :param str modname: The name of the module to be checked.
          :param str data: optional contents of the checked file.
          :returns: the AST
          :rtype: astroid.nodes.Module
          """
          try:
              if data is None:
                  return MANAGER.ast_from_file(filepath, modname, source=True)
              return astroid.builder.AstroidBuilder(MANAGER).string_build(
                  data, modname, filepath
              )
          except astroid.AstroidSyntaxError as ex:
              # pylint: disable=no-member
              self.add_message(
                  "syntax-error",
                  line=getattr(ex.error, "lineno", 0),
                  col_offset=getattr(ex.error, "offset", None),
                  args=str(ex.error),
              )
          except astroid.AstroidBuildingException as ex:
              self.add_message("parse-error", args=ex)
          except Exception as ex:  # pylint: disable=broad-except
              traceback.print_exc()
              self.add_message("astroid-error", args=(ex.__class__, ex))
          return None
  
      def check_astroid_module(self, ast_node, walker, rawcheckers, tokencheckers):
          """Check a module from its astroid representation.
  
          For return value see _check_astroid_module
          """
          before_check_statements = walker.nbstatements
  
          retval = self._check_astroid_module(
              ast_node, walker, rawcheckers, tokencheckers
          )
  
          self.stats["by_module"][self.current_name]["statement"] = (
              walker.nbstatements - before_check_statements
          )
  
          return retval
  
      def _check_astroid_module(self, ast_node, walker, rawcheckers, tokencheckers):
          """Check given AST node with given walker and checkers
  
          :param astroid.nodes.Module ast_node: AST node of the module to check
          :param pylint.utils.ast_walker.ASTWalker walker: AST walker
          :param list rawcheckers: List of token checkers to use
          :param list tokencheckers: List of raw checkers to use
  
          :returns: True if the module was checked, False if ignored,
              None if the module contents could not be parsed
          :rtype: bool
          """
          try:
              tokens = utils.tokenize_module(ast_node)
          except tokenize.TokenError as ex:
              self.add_message("syntax-error", line=ex.args[1][0], args=ex.args[0])
              return None
  
          if not ast_node.pure_python:
              self.add_message("raw-checker-failed", args=ast_node.name)
          else:
              # assert astroid.file.endswith('.py')
              # invoke ITokenChecker interface on self to fetch module/block
              # level options
              self.process_tokens(tokens)
              if self._ignore_file:
                  return False
              # walk ast to collect line numbers
              self.file_state.collect_block_lines(self.msgs_store, ast_node)
              # run raw and tokens checkers
              for checker in rawcheckers:
                  checker.process_module(ast_node)
              for checker in tokencheckers:
                  checker.process_tokens(tokens)
          # generate events to astroid checkers
          walker.walk(ast_node)
          return True
  
      # IAstroidChecker interface #################################################
  
      def open(self):
          """initialize counters"""
          self.stats = {"by_module": {}, "by_msg": {}}
          MANAGER.always_load_extensions = self.config.unsafe_load_any_extension
          MANAGER.max_inferable_values = self.config.limit_inference_results
          MANAGER.extension_package_whitelist.update(self.config.extension_pkg_allow_list)
          if self.config.extension_pkg_whitelist:
              MANAGER.extension_package_whitelist.update(
                  self.config.extension_pkg_whitelist
              )
          for msg_cat in MSG_TYPES.values():
              self.stats[msg_cat] = 0
  
      def generate_reports(self):
          """close the whole package /module, it's time to make reports !
  
          if persistent run, pickle results for later comparison
          """
          # Display whatever messages are left on the reporter.
          self.reporter.display_messages(report_nodes.Section())
  
          if self.file_state.base_name is not None:
              # load previous results if any
              previous_stats = config.load_results(self.file_state.base_name)
              self.reporter.on_close(self.stats, previous_stats)
              if self.config.reports:
                  sect = self.make_reports(self.stats, previous_stats)
              else:
                  sect = report_nodes.Section()
  
              if self.config.reports:
                  self.reporter.display_reports(sect)
              score_value = self._report_evaluation()
              # save results if persistent run
              if self.config.persistent:
                  config.save_results(self.stats, self.file_state.base_name)
          else:
              self.reporter.on_close(self.stats, {})
              score_value = None
          return score_value
  
      def _report_evaluation(self):
          """make the global evaluation report"""
          # check with at least check 1 statements (usually 0 when there is a
          # syntax error preventing pylint from further processing)
          note = None
          previous_stats = config.load_results(self.file_state.base_name)
          if self.stats["statement"] == 0:
              return note
  
          # get a global note for the code
          evaluation = self.config.evaluation
          try:
              note = eval(evaluation, {}, self.stats)  # pylint: disable=eval-used
          except Exception as ex:  # pylint: disable=broad-except
              msg = "An exception occurred while rating: %s" % ex
          else:
              self.stats["global_note"] = note
              msg = "Your code has been rated at %.2f/10" % note
              pnote = previous_stats.get("global_note")
              if pnote is not None:
                  msg += f" (previous run: {pnote:.2f}/10, {note - pnote:+.2f})"
  
          if self.config.score:
              sect = report_nodes.EvaluationSection(msg)
              self.reporter.display_reports(sect)
          return note
  