code: # Copyright (c) 2015-2016, 2018-2020 Claudiu Popa dummy@email.com
  # Copyright (c) 2015-2016 Ceridwen dummy@email.com
  # Copyright (c) 2018 Bryce Guinta dummy@email.com
  # Copyright (c) 2018 Nick Drozd dummy@email.com
  # Copyright (c) 2018 Anthony Sottile dummy@email.com
  # Copyright (c) 2020 hippo91 dummy@email.com
  # Copyright (c) 2021 Pierre Sassoulas dummy@email.com
  
  # Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html
  # For details: https://github.com/PyCQA/astroid/blob/master/LICENSE
  
  
  from astroid import bases
  from astroid import context as contextmod
  from astroid import exceptions, nodes, util
  
  
  class CallSite:
      """Class for understanding arguments passed into a call site
  
      It needs a call context, which contains the arguments and the
      keyword arguments that were passed into a given call site.
      In order to infer what an argument represents, call :meth:`infer_argument`
      with the corresponding function node and the argument name.
  
      :param callcontext:
          An instance of :class:`astroid.context.CallContext`, that holds
          the arguments for the call site.
      :param argument_context_map:
          Additional contexts per node, passed in from :attr:`astroid.context.Context.extra_context`
      :param context:
          An instance of :class:`astroid.context.Context`.
      """
  
      def __init__(self, callcontext, argument_context_map=None, context=None):
          if argument_context_map is None:
              argument_context_map = {}
          self.argument_context_map = argument_context_map
          args = callcontext.args
          keywords = callcontext.keywords
          self.duplicated_keywords = set()
          self._unpacked_args = self._unpack_args(args, context=context)
          self._unpacked_kwargs = self._unpack_keywords(keywords, context=context)
  
          self.positional_arguments = [
              arg for arg in self._unpacked_args if arg is not util.Uninferable
          ]
          self.keyword_arguments = {
              key: value
              for key, value in self._unpacked_kwargs.items()
              if value is not util.Uninferable
          }
  
      @classmethod
      def from_call(cls, call_node, context=None):
          """Get a CallSite object from the given Call node.
  
          :param context:
              An instance of :class:`astroid.context.Context` that will be used
              to force a single inference path.
          """
  
          # Determine the callcontext from the given `context` object if any.
          context = context or contextmod.InferenceContext()
          callcontext = contextmod.CallContext(call_node.args, call_node.keywords)
          return cls(callcontext, context=context)
  
      def has_invalid_arguments(self):
          """Check if in the current CallSite were passed *invalid* arguments
  
          This can mean multiple things. For instance, if an unpacking
          of an invalid object was passed, then this method will return True.
          Other cases can be when the arguments can't be inferred by astroid,
          for example, by passing objects which aren't known statically.
          """
          return len(self.positional_arguments) != len(self._unpacked_args)
  
      def has_invalid_keywords(self):
          """Check if in the current CallSite were passed *invalid* keyword arguments
  
          For instance, unpacking a dictionary with integer keys is invalid
          (**{1:2}), because the keys must be strings, which will make this
          method to return True. Other cases where this might return True if
          objects which can't be inferred were passed.
          """
          return len(self.keyword_arguments) != len(self._unpacked_kwargs)
  
      def _unpack_keywords(self, keywords, context=None):
          values = {}
          context = context or contextmod.InferenceContext()
          context.extra_context = self.argument_context_map
          for name, value in keywords:
              if name is None:
                  # Then it's an unpacking operation (**)
                  try:
                      inferred = next(value.infer(context=context))
                  except exceptions.InferenceError:
                      values[name] = util.Uninferable
                      continue
  
                  if not isinstance(inferred, nodes.Dict):
                      # Not something we can work with.
                      values[name] = util.Uninferable
                      continue
  
                  for dict_key, dict_value in inferred.items:
                      try:
                          dict_key = next(dict_key.infer(context=context))
                      except exceptions.InferenceError:
                          values[name] = util.Uninferable
                          continue
                      if not isinstance(dict_key, nodes.Const):
                          values[name] = util.Uninferable
                          continue
                      if not isinstance(dict_key.value, str):
                          values[name] = util.Uninferable
                          continue
                      if dict_key.value in values:
                          # The name is already in the dictionary
                          values[dict_key.value] = util.Uninferable
                          self.duplicated_keywords.add(dict_key.value)
                          continue
                      values[dict_key.value] = dict_value
              else:
                  values[name] = value
          return values
  
      def _unpack_args(self, args, context=None):
          values = []
          context = context or contextmod.InferenceContext()
          context.extra_context = self.argument_context_map
          for arg in args:
              if isinstance(arg, nodes.Starred):
                  try:
                      inferred = next(arg.value.infer(context=context))
                  except exceptions.InferenceError:
                      values.append(util.Uninferable)
                      continue
  
                  if inferred is util.Uninferable:
                      values.append(util.Uninferable)
                      continue
                  if not hasattr(inferred, "elts"):
                      values.append(util.Uninferable)
                      continue
                  values.extend(inferred.elts)
              else:
                  values.append(arg)
          return values
  
      def infer_argument(self, funcnode, name, context):
          """infer a function argument value according to the call context
  
          Arguments:
              funcnode: The function being called.
              name: The name of the argument whose value is being inferred.
              context: Inference context object
          """
          if name in self.duplicated_keywords:
              raise exceptions.InferenceError(
                  "The arguments passed to {func!r} " " have duplicate keywords.",
                  call_site=self,
                  func=funcnode,
                  arg=name,
                  context=context,
              )
  
          # Look into the keywords first, maybe it's already there.
          try:
              return self.keyword_arguments[name].infer(context)
          except KeyError:
              pass
  
          # Too many arguments given and no variable arguments.
          if len(self.positional_arguments) > len(funcnode.args.args):
              if not funcnode.args.vararg and not funcnode.args.posonlyargs:
                  raise exceptions.InferenceError(
                      "Too many positional arguments "
                      "passed to {func!r} that does "
                      "not have *args.",
                      call_site=self,
                      func=funcnode,
                      arg=name,
                      context=context,
                  )
  
          positional = self.positional_arguments[: len(funcnode.args.args)]
          vararg = self.positional_arguments[len(funcnode.args.args) :]
          argindex = funcnode.args.find_argname(name)[0]
          kwonlyargs = {arg.name for arg in funcnode.args.kwonlyargs}
          kwargs = {
              key: value
              for key, value in self.keyword_arguments.items()
              if key not in kwonlyargs
          }
          # If there are too few positionals compared to
          # what the function expects to receive, check to see
          # if the missing positional arguments were passed
          # as keyword arguments and if so, place them into the
          # positional args list.
          if len(positional) < len(funcnode.args.args):
              for func_arg in funcnode.args.args:
                  if func_arg.name in kwargs:
                      arg = kwargs.pop(func_arg.name)
                      positional.append(arg)
  
          if argindex is not None:
              # 2. first argument of instance/class method
              if argindex == 0 and funcnode.type in ("method", "classmethod"):
                  if context.boundnode is not None:
                      boundnode = context.boundnode
                  else:
                      # XXX can do better ?
                      boundnode = funcnode.parent.frame()
  
                  if isinstance(boundnode, nodes.ClassDef):
                      # Verify that we're accessing a method
                      # of the metaclass through a class, as in
                      # `cls.metaclass_method`. In this case, the
                      # first argument is always the class.
                      method_scope = funcnode.parent.scope()
                      if method_scope is boundnode.metaclass():
                          return iter((boundnode,))
  
                  if funcnode.type == "method":
                      if not isinstance(boundnode, bases.Instance):
                          boundnode = boundnode.instantiate_class()
                      return iter((boundnode,))
                  if funcnode.type == "classmethod":
                      return iter((boundnode,))
              # if we have a method, extract one position
              # from the index, so we'll take in account
              # the extra parameter represented by `self` or `cls`
              if funcnode.type in ("method", "classmethod"):
                  argindex -= 1
              # 2. search arg index
              try:
                  return self.positional_arguments[argindex].infer(context)
              except IndexError:
                  pass
  
          if funcnode.args.kwarg == name:
              # It wants all the keywords that were passed into
              # the call site.
              if self.has_invalid_keywords():
                  raise exceptions.InferenceError(
                      "Inference failed to find values for all keyword arguments "
                      "to {func!r}: {unpacked_kwargs!r} doesn't correspond to "
                      "{keyword_arguments!r}.",
                      keyword_arguments=self.keyword_arguments,
                      unpacked_kwargs=self._unpacked_kwargs,
                      call_site=self,
                      func=funcnode,
                      arg=name,
                      context=context,
                  )
              kwarg = nodes.Dict(
                  lineno=funcnode.args.lineno,
                  col_offset=funcnode.args.col_offset,
                  parent=funcnode.args,
              )
              kwarg.postinit(
                  [(nodes.const_factory(key), value) for key, value in kwargs.items()]
              )
              return iter((kwarg,))
          if funcnode.args.vararg == name:
              # It wants all the args that were passed into
              # the call site.
              if self.has_invalid_arguments():
                  raise exceptions.InferenceError(
                      "Inference failed to find values for all positional "
                      "arguments to {func!r}: {unpacked_args!r} doesn't "
                      "correspond to {positional_arguments!r}.",
                      positional_arguments=self.positional_arguments,
                      unpacked_args=self._unpacked_args,
                      call_site=self,
                      func=funcnode,
                      arg=name,
                      context=context,
                  )
              args = nodes.Tuple(
                  lineno=funcnode.args.lineno,
                  col_offset=funcnode.args.col_offset,
                  parent=funcnode.args,
              )
              args.postinit(vararg)
              return iter((args,))
  
          # Check if it's a default parameter.
          try:
              return funcnode.args.default_value(name).infer(context)
          except exceptions.NoDefault:
              pass
          raise exceptions.InferenceError(
              "No value found for argument {arg} to {func!r}",
              call_site=self,
              func=funcnode,
              arg=name,
              context=context,
          )
  
entities: [['EMAIL_ADDRESS', 'dummy@email.com'], ['EMAIL_ADDRESS', 'dummy@email.com'], ['EMAIL_ADDRESS', 'dummy@email.com'], ['EMAIL_ADDRESS', 'dummy@email.com'], ['EMAIL_ADDRESS', 'dummy@email.com'], ['EMAIL_ADDRESS', 'dummy@email.com'], ['EMAIL_ADDRESS', 'dummy@email.com'], ['DATE_TIME', '2015-2016'], ['DATE_TIME', '2018-2020'], ['PERSON', 'Claudiu Popa'], ['DATE_TIME', '2015-2016'], ['PERSON', 'Ceridwen'], ['PERSON', 'Nick Drozd'], ['PERSON', 'Anthony Sottile'], ['DATE_TIME', '2020'], ['PERSON', 'hippo91'], ['DATE_TIME', '2021'], ['PERSON', 'Pierre Sassoulas'], ['PERSON', 'callcontext = contextmod'], ['PERSON', 'kwonlyargs'], ['PERSON', 'boundnode'], ['PERSON', 'boundnode'], ['PERSON', 'lineno=funcnode.args.lineno'], ['PERSON', 'lineno=funcnode.args.lineno'], ['URL', 'https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html'], ['URL', 'https://github.com/PyCQA/astroid/blob/master/LICENSE'], ['URL', 'email.com'], ['URL', 'email.com'], ['URL', 'email.com'], ['URL', 'email.com'], ['URL', 'email.com'], ['URL', 'email.com'], ['URL', 'email.com'], ['URL', 'astroid.context.Ca'], ['URL', 'astroid.context.Co'], ['URL', 'astroid.context.Co'], ['URL', 'self.ar'], ['URL', 'callcontext.ar'], ['URL', 'callcontext.ke'], ['URL', 'self.ke'], ['URL', 'kwargs.it'], ['URL', 'astroid.context.Co'], ['URL', 'contextmod.In'], ['URL', 'contextmod.Ca'], ['URL', 'node.ar'], ['URL', 'node.ke'], ['URL', 'self.ke'], ['URL', 'contextmod.In'], ['URL', 'self.ar'], ['URL', 'value.in'], ['URL', 'exceptions.In'], ['URL', 'inferred.it'], ['URL', 'key.in'], ['URL', 'exceptions.In'], ['URL', 'nodes.Co'], ['URL', 'key.va'], ['URL', 'key.va'], ['URL', 'key.va'], ['URL', 'keywords.ad'], ['URL', 'key.va'], ['URL', 'key.va'], ['URL', 'contextmod.In'], ['URL', 'self.ar'], ['URL', 'nodes.St'], ['URL', 'arg.value.in'], ['URL', 'exceptions.In'], ['URL', 'exceptions.In'], ['URL', 'self.ke'], ['URL', 'funcnode.args.ar'], ['URL', 'funcnode.args.va'], ['URL', 'funcnode.ar'], ['URL', 'exceptions.In'], ['URL', 'funcnode.args.ar'], ['URL', 'funcnode.args.ar'], ['URL', 'funcnode.args.fi'], ['URL', 'arg.na'], ['URL', 'funcnode.args.kw'], ['URL', 'self.ke'], ['URL', 'arguments.it'], ['URL', 'funcnode.args.ar'], ['URL', 'funcnode.args.ar'], ['URL', 'arg.na'], ['URL', 'arg.na'], ['URL', 'context.bo'], ['URL', 'context.bo'], ['URL', 'funcnode.parent.fr'], ['URL', 'nodes.Cl'], ['URL', 'cls.me'], ['URL', 'funcnode.parent.sc'], ['URL', 'boundnode.me'], ['URL', 'bases.In'], ['URL', 'boundnode.in'], ['URL', 'funcnode.args.kw'], ['URL', 'exceptions.In'], ['URL', 'self.ke'], ['URL', 'funcnode.args.li'], ['URL', 'funcnode.args.co'], ['URL', 'funcnode.ar'], ['URL', 'nodes.co'], ['URL', 'kwargs.it'], ['URL', 'funcnode.args.va'], ['URL', 'exceptions.In'], ['URL', 'funcnode.args.li'], ['URL', 'funcnode.args.co'], ['URL', 'funcnode.ar'], ['URL', 'funcnode.args.de'], ['URL', 'exceptions.No'], ['URL', 'exceptions.In']]