text: import re
  from zlib import crc32
  
  
  class TLObject:
      """.tl core types IDs (such as vector, booleans, etc.)"""
      CORE_TYPES = (0x1cb5c415, 0xbc799737, 0x997275b5, 0x3fedd339)
  
      def __init__(self, fullname, object_id, args, result, is_function):
          """
          Initializes a new TLObject, given its properties.
          Usually, this will be called from `from_tl` instead
          :param fullname: The fullname of the TL object (namespace.name)
                           The namespace can be omitted
          :param object_id: The hexadecimal string representing the object ID
          :param args: The arguments, if any, of the TL object
          :param result: The result type of the TL object
          :param is_function: Is the object a function or a type?
          """
          # The name can or not have a namespace
          if '.' in fullname:
              self.namespace = fullname.split('.')[0]
              self.name = fullname.split('.')[1]
          else:
              self.namespace = None
              self.name = fullname
  
          self.args = args
          self.result = result
          self.is_function = is_function
  
          # The ID should be an hexadecimal string or None to be inferred
          if object_id is None:
              self.id = self.infer_id()
          else:
              self.id = int(object_id, base=16)
              assert self.id == self.infer_id(),\
                  'Invalid inferred ID for ' + repr(self)
  
      @staticmethod
      def from_tl(tl, is_function):
          """Returns a TL object from the given TL scheme line"""
  
          # Regex to match the whole line
          match = re.match(r'''
              ^                  # We want to match from the beginning to the end
              ([\w.]+)           # The .tl object can contain alpha_name or namespace.alpha_name
              (?:
                  \#             # After the name, comes the ID of the object
                  ([0-9a-f]+)    # The constructor ID is in hexadecimal form
              )?                 # If no constructor ID was given, CRC32 the 'tl' to determine it
  
              (?:\s              # After that, we want to match its arguments (name:type)
                  {?             # For handling the start of the '{X:Type}' case
                  \w+            # The argument name will always be an alpha-only name
                  :              # Then comes the separator between name:type
                  [\w\d<>#.?!]+  # The type is slightly more complex, since it's alphanumeric and it can
                                 # also have Vector<type>, flags:# and flags.0?default, plus :!X as type
                  }?             # For handling the end of the '{X:Type}' case
              )*                 # Match 0 or more arguments
              \s                 # Leave a space between the arguments and the equal
              =
              \s                 # Leave another space between the equal and the result
              ([\w\d<>#.?]+)     # The result can again be as complex as any argument type
              ;$                 # Finally, the line should always end with ;
              ''', tl, re.IGNORECASE | re.VERBOSE)
  
          # Sub-regex to match the arguments (sadly, it cannot be embedded in the first regex)
          args_match = re.findall(r'''
              ({)?             # We may or may not capture the opening brace
              (\w+)            # First we capture any alpha name with length 1 or more
              :                # Which is separated from its type by a colon
              ([\w\d<>#.?!]+)  # The type is slightly more complex, since it's alphanumeric and it can
                               # also have Vector<type>, flags:# and flags.0?default, plus :!X as type
              (})?             # We may or not capture the closing brace
              ''', tl, re.IGNORECASE | re.VERBOSE)
  
          # Retrieve the matched arguments
          args = [TLArg(name, arg_type, brace != '')
                  for brace, name, arg_type, _ in args_match]
  
          # And initialize the TLObject
          return TLObject(
              fullname=match.group(1),
              object_id=match.group(2),
              args=args,
              result=match.group(3),
              is_function=is_function)
  
      def sorted_args(self):
          """Returns the arguments properly sorted and ready to plug-in
             into a Python's method header (i.e., flags and those which
             can be inferred will go last so they can default =None)
          """
          return sorted(self.args,
                        key=lambda x: x.is_flag or x.can_be_inferred)
  
      def is_core_type(self):
          """Determines whether the TLObject is a "core type"
             (and thus should be embedded in the generated code) or not"""
          return self.id in TLObject.CORE_TYPES
  
      def __repr__(self, ignore_id=False):
          fullname = ('{}.{}'.format(self.namespace, self.name)
                      if self.namespace is not None else self.name)
  
          if getattr(self, 'id', None) is None or ignore_id:
              hex_id = ''
          else:
              # Skip 0x and add 0's for padding
              hex_id = '#' + hex(self.id)[2:].rjust(8, '0')
  
          if self.args:
              args = ' ' + ' '.join([repr(arg) for arg in self.args])
          else:
              args = ''
  
          return '{}{}{} = {}'.format(fullname, hex_id, args, self.result)
  
      def infer_id(self):
          representation = self.__repr__(ignore_id=True)
  
          # Clean the representation
          representation = representation\
              .replace(':bytes ', ':string ')\
              .replace('?bytes ', '?string ')\
              .replace('<', ' ').replace('>', '')\
              .replace('{', '').replace('}', '')
  
          representation = re.sub(
              r' \w+:flags\.\d+\?true',
              r'',
              representation
          )
          return crc32(representation.encode('ascii'))
  
      def __str__(self):
          fullname = ('{}.{}'.format(self.namespace, self.name)
                      if self.namespace is not None else self.name)
  
          # Some arguments are not valid for being represented, such as the flag indicator or generic definition
          # (these have no explicit values until used)
          valid_args = [arg for arg in self.args
                        if not arg.flag_indicator and not arg.generic_definition]
  
          args = ', '.join(['{}={{}}'.format(arg.name) for arg in valid_args])
  
          # Since Python's default representation for lists is using repr(), we need to str() manually on every item
          args_format = ', '.join(
              ['str(self.{})'.format(arg.name) if not arg.is_vector else
               'None if not self.{0} else [str(_) for _ in self.{0}]'.format(
                   arg.name) for arg in valid_args])
  
          return ("'({} (ID: {}) = ({}))'.format({})"
                  .format(fullname, hex(self.id), args, args_format))
  
  
  class TLArg:
      def __init__(self, name, arg_type, generic_definition):
          """
          Initializes a new .tl argument
          :param name: The name of the .tl argument
          :param arg_type: The type of the .tl argument
          :param generic_definition: Is the argument a generic definition?
                                     (i.e. {X:Type})
          """
          if name == 'self':  # This very only name is restricted
              self.name = 'is_self'
          else:
              self.name = name
  
          # Default values
          self.is_vector = False
          self.is_flag = False
          self.flag_index = -1
  
          # Special case: some types can be inferred, which makes it
          # less annoying to type. Currently the only type that can
          # be inferred is if the name is 'random_id', to which a
          # random ID will be assigned if left as None (the default)
          self.can_be_inferred = name == 'random_id'
  
          # The type can be an indicator that other arguments will be flags
          if arg_type == '#':
              self.flag_indicator = True
              self.type = None
              self.is_generic = False
          else:
              self.flag_indicator = False
              self.is_generic = arg_type.startswith('!')
              self.type = arg_type.lstrip(
                  '!')  # Strip the exclamation mark always to have only the name
  
              # The type may be a flag (flags.IDX?REAL_TYPE)
              # Note that 'flags' is NOT the flags name; this is determined by a previous argument
              # However, we assume that the argument will always be called 'flags'
              flag_match = re.match(r'flags.(\d+)\?([\w<>.]+)', self.type)
              if flag_match:
                  self.is_flag = True
                  self.flag_index = int(flag_match.group(1))
                  # Update the type to match the exact type, not the "flagged" one
                  self.type = flag_match.group(2)
  
              # Then check if the type is a Vector<REAL_TYPE>
              vector_match = re.match(r'vector<(\w+)>', self.type, re.IGNORECASE)
              if vector_match:
                  self.is_vector = True
  
                  # If the type's first letter is not uppercase, then
                  # it is a constructor and we use (read/write) its ID
                  # as pinpointed on issue #81.
                  self.use_vector_id = self.type[0] == 'V'
  
                  # Update the type to match the one inside the vector
                  self.type = vector_match.group(1)
  
              # The name may contain "date" in it, if this is the case and the type is "int",
              # we can safely assume that this should be treated as a "date" object.
              # Note that this is not a valid Telegram object, but it's easier to work with
              if self.type == 'int' and (
                          re.search(r'(\b|_)date\b', name) or
                          name in ('expires', 'expires_at', 'was_online')):
                  self.type = 'date'
  
          self.generic_definition = generic_definition
  
      def __str__(self):
          # Find the real type representation by updating it as required
          real_type = self.type
          if self.flag_indicator:
              real_type = '#'
  
          if self.is_vector:
              if self.use_vector_id:
                  real_type = 'Vector<{}>'.format(real_type)
              else:
                  real_type = 'vector<{}>'.format(real_type)
  
          if self.is_generic:
              real_type = '!{}'.format(real_type)
  
          if self.is_flag:
              real_type = 'flags.{}?{}'.format(self.flag_index, real_type)
  
          if self.generic_definition:
              return '{{{}:{}}}'.format(self.name, real_type)
          else:
              return '{}:{}'.format(self.name, real_type)
  
      def __repr__(self):
          # Get rid of our special type
          return str(self)\
              .replace(':date', ':int')\
              .replace('?date', '?int')
  