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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def Collect( self, knowledge_base, artifact_definition, searcher):
 """Collects values using a Windows Registry value artifact definition. Args: knowledge_base (KnowledgeBase):
 to fill with preprocessing information. artifact_definition (artifacts.ArtifactDefinition):
 artifact definition. searcher (dfwinreg.WinRegistrySearcher):
 Windows Registry searcher to preprocess the Windows Registry. Raises: PreProcessFail: if the Windows Registry key or value cannot be read. """

    for source in artifact_definition.sources:
      if source.type_indicator not in (
          artifact_definitions.TYPE_INDICATOR_WINDOWS_REGISTRY_KEY,
          artifact_definitions.TYPE_INDICATOR_WINDOWS_REGISTRY_VALUE):
        continue

      if source.type_indicator == (
          artifact_definitions.TYPE_INDICATOR_WINDOWS_REGISTRY_KEY):
        key_value_pairs = [{'key': key} for key in source.keys]
      else:
        key_value_pairs = source.key_value_pairs

      for key_value_pair in key_value_pairs:
        key_path = key_value_pair['key']

        # The artifact definitions currently incorrectly define
        # CurrentControlSet so we correct it here for now.
        # Also see: https://github.com/ForensicArtifacts/artifacts/issues/120
        key_path_upper = key_path.upper()
        if key_path_upper.startswith('%%CURRENT_CONTROL_SET%%'):
          key_path = '{0:s}{1:s}'.format(
              'HKEY_LOCAL_MACHINE\\System\\CurrentControlSet', key_path[23:])

        find_spec = registry_searcher.FindSpec(key_path_glob=key_path)

        for key_path in searcher.Find(find_specs=[find_spec]):
          try:
            registry_key = searcher.GetKeyByPath(key_path)
          except IOError as exception:
            raise errors.PreProcessFail((
                'Unable to retrieve Windows Registry key: {0:s} with error: '
                '{1!s}').format(key_path, exception))

          if registry_key:
            value_name = key_value_pair.get('value', None)
            self._ParseKey(knowledge_base, registry_key, value_name)