text: import os
  import os.path
  import io
  import re
  import sys
  import json
  import traceback
  import platform
  
  jediPreview = False
  
  class RedirectStdout(object):
      def __init__(self, new_stdout=None):
          """If stdout is None, redirect to /dev/null"""
          self._new_stdout = new_stdout or open(os.devnull, 'w')
  
      def __enter__(self):
          sys.stdout.flush()
          self.oldstdout_fno = os.dup(sys.stdout.fileno())
          os.dup2(self._new_stdout.fileno(), 1)
  
      def __exit__(self, exc_type, exc_value, traceback):
          self._new_stdout.flush()
          os.dup2(self.oldstdout_fno, 1)
          os.close(self.oldstdout_fno)
  
  class JediCompletion(object):
      basic_types = {
          'module': 'import',
          'instance': 'variable',
          'statement': 'value',
          'param': 'variable',
      }
  
      def __init__(self):
          self.default_sys_path = sys.path
          self._input = io.open(sys.stdin.fileno(), encoding='utf-8')
          if (os.path.sep == '/') and (platform.uname()[2].find('Microsoft') > -1):
              # WSL; does not support UNC paths
              self.drive_mount = '/mnt/'
          elif sys.platform == 'cygwin':
              # cygwin
              self.drive_mount = '/cygdrive/'
          else:
              # Do no normalization, e.g. Windows build of Python.
              # Could add additional test: ((os.path.sep == '/') and os.path.isdir('/mnt/c'))
              # However, this may have more false positives trying to identify Windows/*nix hybrids
              self.drive_mount = ''
  
      def _get_definition_type(self, definition):
          # if definition.type not in ['import', 'keyword'] and is_built_in():
          #    return 'builtin'
          try:
              if definition.type in ['statement'] and definition.name.isupper():
                  return 'constant'
              return self.basic_types.get(definition.type, definition.type)
          except Exception:
              return 'builtin'
  
      def _additional_info(self, completion):
          """Provide additional information about the completion object."""
          if not hasattr(completion, '_definition') or completion._definition is None:
              return ''
          if completion.type == 'statement':
              nodes_to_display = ['InstanceElement', 'String', 'Node', 'Lambda',
                                  'Number']
              return ''.join(c.get_code() for c in
                             completion._definition.children if type(c).__name__
                             in nodes_to_display).replace('\n', '')
          return ''
  
      @classmethod
      def _get_top_level_module(cls, path):
          """Recursively walk through directories looking for top level module.
  
          Jedi will use current filepath to look for another modules at same
          path, but it will not be able to see modules **above**, so our goal
          is to find the higher python module available from filepath.
          """
          _path, _ = os.path.split(path)
          if os.path.isfile(os.path.join(_path, '__init__.py')):
              return cls._get_top_level_module(_path)
          return path
  
      def _generate_signature(self, completion):
          """Generate signature with function arguments.
          """
          if completion.type in ['module'] or not hasattr(completion, 'params'):
              return ''
          return '%s(%s)' % (
              completion.name,
              ', '.join(p.description[6:] for p in completion.params if p))
  
      def _get_call_signatures(self, script):
          """Extract call signatures from jedi.api.Script object in failsafe way.
  
          Returns:
              Tuple with original signature object, name and value.
          """
          _signatures = []
          try:
              call_signatures = script.call_signatures()
          except KeyError:
              call_signatures = []
          except :
              call_signatures = []
          for signature in call_signatures:
              for pos, param in enumerate(signature.params):
                  if not param.name:
                      continue
  
                  name = self._get_param_name(param)
                  if param.name == 'self' and pos == 0:
                      continue
                  if name.startswith('*'):
                      continue
  
                  value = self._get_param_value(param)
                  _signatures.append((signature, name, value))
          return _signatures
  
      def _get_param_name(self, p):
          if(p.name.startswith('param ')):
              return p.name[6:] # drop leading 'param '
          return p.name
  
      def _get_param_value(self, p):
          pair = p.description.split('=')
          if(len(pair) > 1):
              return pair[1]
          return None
  
      def _get_call_signatures_with_args(self, script):
          """Extract call signatures from jedi.api.Script object in failsafe way.
  
          Returns:
              Array with dictionary
          """
          _signatures = []
          try:
              call_signatures = script.call_signatures()
          except KeyError:
              call_signatures = []
          for signature in call_signatures:
              sig = {"name": "", "description": "", "docstring": "",
                     "paramindex": 0, "params": [], "bracketstart": []}
              sig["description"] = signature.description
              try:
                  sig["docstring"] = signature.docstring()
                  sig["raw_docstring"] = signature.docstring(raw=True)
              except Exception:
                  sig["docstring"] = ''
                  sig["raw_docstring"] = ''
  
              sig["name"] = signature.name
              sig["paramindex"] = signature.index
              sig["bracketstart"].append(signature.index)
  
              _signatures.append(sig)
              for pos, param in enumerate(signature.params):
                  if not param.name:
                      continue
  
                  name = self._get_param_name(param)
                  if param.name == 'self' and pos == 0:
                      continue
  
                  value = self._get_param_value(param)
                  paramDocstring = ''
                  try:
                      paramDocstring = param.docstring()
                  except Exception:
                      paramDocstring = ''
  
                  sig["params"].append({"name": name, "value": value, "docstring": paramDocstring, "description": param.description})
          return _signatures
  
      def _serialize_completions(self, script, identifier=None, prefix=''):
          """Serialize response to be read from VSCode.
  
          Args:
              script: Instance of jedi.api.Script object.
              identifier: Unique completion identifier to pass back to VSCode.
              prefix: String with prefix to filter function arguments.
                  Used only when fuzzy matcher turned off.
  
          Returns:
              Serialized string to send to VSCode.
          """
          _completions = []
  
          for signature, name, value in self._get_call_signatures(script):
              if not self.fuzzy_matcher and not name.lower().startswith(
                      prefix.lower()):
                  continue
              _completion = {
                  'type': 'property',
                  'raw_type': '',
                  'rightLabel': self._additional_info(signature)
              }
              _completion['description'] = ''
              _completion['raw_docstring'] = ''
  
              # we pass 'text' here only for fuzzy matcher
              if value:
                  _completion['snippet'] = '%s=${1:%s}$0' % (name, value)
                  _completion['text'] = '%s=' % (name)
              else:
                  _completion['snippet'] = '%s=$1$0' % name
                  _completion['text'] = name
                  _completion['displayText'] = name
              _completions.append(_completion)
  
          try:
              completions = script.completions()
          except KeyError:
              completions = []
          except :
              completions = []
          for completion in completions:
              try:
                  _completion = {
                      'text': completion.name,
                      'type': self._get_definition_type(completion),
                      'raw_type': completion.type,
                      'rightLabel': self._additional_info(completion)
                  }
              except Exception:
                  continue
  
              for c in _completions:
                  if c['text'] == _completion['text']:
                      c['type'] = _completion['type']
                      c['raw_type'] = _completion['raw_type']
  
              if any([c['text'].split('=')[0] == _completion['text']
                      for c in _completions]):
                  # ignore function arguments we already have
                  continue
              _completions.append(_completion)
          return json.dumps({'id': identifier, 'results': _completions})
  
      def _serialize_methods(self, script, identifier=None, prefix=''):
          _methods = []
          try:
              completions = script.completions()
          except KeyError:
              return []
  
          for completion in completions:
              if completion.name == '__autocomplete_python':
                instance = completion.parent().name
                break
          else:
              instance = 'self.__class__'
  
          for completion in completions:
              params = []
              if hasattr(completion, 'params'):
                  params = [p.description for p in completion.params if p]
              if completion.parent().type == 'class':
                _methods.append({
                  'parent': completion.parent().name,
                  'instance': instance,
                  'name': completion.name,
                  'params': params,
                  'moduleName': completion.module_name,
                  'fileName': completion.module_path,
                  'line': completion.line,
                  'column': completion.column,
                })
          return json.dumps({'id': identifier, 'results': _methods})
  
      def _serialize_arguments(self, script, identifier=None):
          """Serialize response to be read from VSCode.
  
          Args:
              script: Instance of jedi.api.Script object.
              identifier: Unique completion identifier to pass back to VSCode.
  
          Returns:
              Serialized string to send to VSCode.
          """
          return json.dumps({"id": identifier, "results": self._get_call_signatures_with_args(script)})
  
      def _top_definition(self, definition):
          for d in definition.goto_assignments():
              if d == definition:
                  continue
              if d.type == 'import':
                  return self._top_definition(d)
              else:
                  return d
          return definition
  
      def _extract_range_jedi_0_11_1(self, definition):
          from parso.utils import split_lines
          # get the scope range
          try:
              if definition.type in ['class', 'function']:
                  tree_name = definition._name.tree_name
                  scope = tree_name.get_definition()
                  start_line = scope.start_pos[0] - 1
                  start_column = scope.start_pos[1]
                  # get the lines
                  code = scope.get_code(include_prefix=False)
                  lines = split_lines(code)
                  # trim the lines
                  lines = '\n'.join(lines).rstrip().split('\n')
                  end_line = start_line + len(lines) - 1
                  end_column = len(lines[-1]) - 1
              else:
                  symbol = definition._name.tree_name
                  start_line = symbol.start_pos[0] - 1
                  start_column = symbol.start_pos[1]
                  end_line = symbol.end_pos[0] - 1
                  end_column =  symbol.end_pos[1]
              return {
                  'start_line': start_line,
                  'start_column': start_column,
                  'end_line': end_line,
                  'end_column': end_column
              }
          except Exception as e:
              return {
                  'start_line': definition.line - 1,
                  'start_column': definition.column,
                  'end_line': definition.line - 1,
                  'end_column': definition.column
              }
  
      def _extract_range(self, definition):
          """Provides the definition range of a given definition
  
          For regular symbols it returns the start and end location of the
          characters making up the symbol.
  
          For scoped containers it will return the entire definition of the
          scope.
  
          The scope that jedi provides ends with the first character of the next
          scope so it's not ideal. For vscode we need the scope to end with the
          last character of actual code. That's why we extract the lines that
          make up our scope and trim the trailing whitespace.
          """
          return self._extract_range_jedi_0_11_1(definition)
  
      def _get_definitionsx(self, definitions, identifier=None, ignoreNoModulePath=False):
          """Serialize response to be read from VSCode.
  
          Args:
              definitions: List of jedi.api.classes.Definition objects.
              identifier: Unique completion identifier to pass back to VSCode.
  
          Returns:
              Serialized string to send to VSCode.
          """
          _definitions = []
          for definition in definitions:
              try:
                  if definition.type == 'import':
                      definition = self._top_definition(definition)
                  definitionRange = {
                      'start_line': 0,
                      'start_column': 0,
                      'end_line': 0,
                      'end_column': 0
                  }
                  module_path = ''
                  if hasattr(definition, 'module_path') and definition.module_path:
                      module_path = definition.module_path
                      definitionRange = self._extract_range(definition)
                  else:
                      if not ignoreNoModulePath:
                          continue
                  try:
                      parent = definition.parent()
                      container = parent.name if parent.type != 'module' else ''
                  except Exception:
                      container = ''
  
                  try:
                      docstring = definition.docstring()
                      rawdocstring = definition.docstring(raw=True)
                  except Exception:
                      docstring = ''
                      rawdocstring = ''
                  _definition = {
                      'text': definition.name,
                      'type': self._get_definition_type(definition),
                      'raw_type': definition.type,
                      'fileName': module_path,
                      'container': container,
                      'range': definitionRange,
                      'description': definition.description,
                      'docstring': docstring,
                      'raw_docstring': rawdocstring,
                      'signature': self._generate_signature(definition)
                  }
                  _definitions.append(_definition)
              except Exception as e:
                  pass
          return _definitions
  
      def _serialize_definitions(self, definitions, identifier=None):
          """Serialize response to be read from VSCode.
  
          Args:
              definitions: List of jedi.api.classes.Definition objects.
              identifier: Unique completion identifier to pass back to VSCode.
  
          Returns:
              Serialized string to send to VSCode.
          """
          _definitions = []
          for definition in definitions:
              try:
                  if definition.module_path:
                      if definition.type == 'import':
                          definition = self._top_definition(definition)
                      if not definition.module_path:
                          continue
                      try:
                          parent = definition.parent()
                          container = parent.name if parent.type != 'module' else ''
                      except Exception:
                          container = ''
  
                      try:
                          docstring = definition.docstring()
                          rawdocstring = definition.docstring(raw=True)
                      except Exception:
                          docstring = ''
                          rawdocstring = ''
                      _definition = {
                          'text': definition.name,
                          'type': self._get_definition_type(definition),
                          'raw_type': definition.type,
                          'fileName': definition.module_path,
                          'container': container,
                          'range': self._extract_range(definition),
                          'description': definition.description,
                          'docstring': docstring,
                          'raw_docstring': rawdocstring
                      }
                      _definitions.append(_definition)
              except Exception as e:
                  pass
          return json.dumps({'id': identifier, 'results': _definitions})
  
      def _serialize_tooltip(self, definitions, identifier=None):
          _definitions = []
          for definition in definitions:
              signature = definition.name
              description = None
              if definition.type in ['class', 'function']:
                  signature = self._generate_signature(definition)
                  try:
                      description = definition.docstring(raw=True).strip()
                  except Exception:
                      description = ''
                  if not description and not hasattr(definition, 'get_line_code'):
                      # jedi returns an empty string for compiled objects
                      description = definition.docstring().strip()
              if definition.type == 'module':
                  signature = definition.full_name
                  try:
                      description = definition.docstring(raw=True).strip()
                  except Exception:
                      description = ''
                  if not description and hasattr(definition, 'get_line_code'):
                      # jedi returns an empty string for compiled objects
                      description = definition.docstring().strip()
              _definition = {
                  'type': self._get_definition_type(definition),
                  'text': definition.name,
                  'description': description,
                  'docstring': description,
                  'signature': signature
              }
              _definitions.append(_definition)
          return json.dumps({'id': identifier, 'results': _definitions})
  
      def _serialize_usages(self, usages, identifier=None):
          _usages = []
          for usage in usages:
              _usages.append({
                  'name': usage.name,
                  'moduleName': usage.module_name,
                  'fileName': usage.module_path,
                  'line': usage.line,
                  'column': usage.column,
              })
          return json.dumps({'id': identifier, 'results': _usages})
  
      def _deserialize(self, request):
          """Deserialize request from VSCode.
  
          Args:
              request: String with raw request from VSCode.
  
          Returns:
              Python dictionary with request data.
          """
          return json.loads(request)
  
      def _set_request_config(self, config):
          """Sets config values for current request.
  
          This includes sys.path modifications which is getting restored to
          default value on each request so each project should be isolated
          from each other.
  
          Args:
              config: Dictionary with config values.
          """
          sys.path = self.default_sys_path
          self.use_snippets = config.get('useSnippets')
          self.show_doc_strings = config.get('showDescriptions', True)
          self.fuzzy_matcher = config.get('fuzzyMatcher', False)
          jedi.settings.case_insensitive_completion = config.get(
              'caseInsensitiveCompletion', True)
          for path in config.get('extraPaths', []):
              if path and path not in sys.path:
                  sys.path.insert(0, path)
  
      def _normalize_request_path(self, request):
          """Normalize any Windows paths received by a *nix build of
             Python. Does not alter the reverse os.path.sep=='\\',
             i.e. *nix paths received by a Windows build of Python.
          """
          if 'path' in request:
              if not self.drive_mount:
                  return
              newPath = request['path'].replace('\\', '/')
              if newPath[0:1] == '/':
                  # is absolute path with no drive letter
                  request['path'] = newPath
              elif newPath[1:2] == ':':
                  # is path with drive letter, only absolute can be mapped
                  request['path'] = self.drive_mount + newPath[0:1].lower() + newPath[2:]
              else:
                  # is relative path
                  request['path'] = newPath
  
      def _process_request(self, request):
          """Accept serialized request from VSCode and write response.
          """
          request = self._deserialize(request)
  
          self._set_request_config(request.get('config', {}))
  
          self._normalize_request_path(request)
          path = self._get_top_level_module(request.get('path', ''))
          if len(path) > 0 and path not in sys.path:
              sys.path.insert(0, path)
          lookup = request.get('lookup', 'completions')
  
          if lookup == 'names':
              return self._serialize_definitions(
                  jedi.api.names(
                      source=request.get('source', None),
                      path=request.get('path', ''),
                      all_scopes=True,
                      ),
                  request['id'])
  
          script = jedi.Script(
                  source=request.get('source', None),
                  line=request['line'] + 1,
                  column=request['column'],
                  path=request.get('path', ''),
                  sys_path=sys.path,
                  )
  
          if lookup == 'definitions':
              defs = self._get_definitionsx(script.goto_assignments(follow_imports=True), request['id'])
              return json.dumps({'id': request['id'], 'results': defs})
          if lookup == 'tooltip':
              if jediPreview:
                  defs = []
                  try:
                      defs = self._get_definitionsx(script.goto_definitions(), request['id'], True)
                  except:
                      pass
                  try:
                      if len(defs) == 0:
                          defs = self._get_definitionsx(script.goto_assignments(), request['id'], True)
                  except:
                      pass
                  return json.dumps({'id': request['id'], 'results': defs})
              else:
                  try:
                      return self._serialize_tooltip(script.goto_definitions(), request['id'])
                  except:
                      return json.dumps({'id': request['id'], 'results': []})
          elif lookup == 'arguments':
              return self._serialize_arguments(
                  script, request['id'])
          elif lookup == 'usages':
              return self._serialize_usages(
                  script.usages(), request['id'])
          elif lookup == 'methods':
            return self._serialize_methods(script, request['id'],
                                        request.get('prefix', ''))
          else:
              return self._serialize_completions(script, request['id'],
                                              request.get('prefix', ''))
  
      def _write_response(self, response):
          sys.stdout.write(response + '\n')
          sys.stdout.flush()
  
      def watch(self):
          while True:
              try:
                  rq = self._input.readline()
                  if len(rq) == 0:
                      # Reached EOF - indication our parent process is gone.
                      sys.stderr.write('Received EOF from the standard input,exiting' + '\n')
                      sys.stderr.flush()
                      return
                  with RedirectStdout():
                      response = self._process_request(rq)
                  self._write_response(response)
  
              except Exception:
                  sys.stderr.write(traceback.format_exc() + '\n')
                  sys.stderr.flush()
  
  if __name__ == '__main__':
      cachePrefix = 'v'
      modulesToLoad = ''
      if len(sys.argv) > 2 and sys.argv[1] == 'custom':
          jediPath = sys.argv[2]
          jediPreview = True
          cachePrefix = 'custom_v'
          if len(sys.argv) > 3:
              modulesToLoad = sys.argv[3]
      else:
          #release
          jediPath = os.path.join(os.path.dirname(__file__), 'lib', 'python')
          if len(sys.argv) > 1:
              modulesToLoad = sys.argv[1]
  
      sys.path.insert(0, jediPath)
      import jedi
      if jediPreview:
          jedi.settings.cache_directory = os.path.join(
              jedi.settings.cache_directory, cachePrefix + jedi.__version__.replace('.', ''))
      # remove jedi from path after we import it so it will not be completed
      sys.path.pop(0)
      if len(modulesToLoad) > 0:
          jedi.preload_module(*modulesToLoad.split(','))
      JediCompletion().watch()
  