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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 SetSourceInformation( self, source_path, source_type, artifact_filters=None, filter_file=None):
 """Sets the source information. Args: source_path (str):
 path of the source. source_type (str):
 source type. artifact_filters (Optional[list[str]]):
 names of artifact definitions to use as filters. filter_file (Optional[str]):
 filter file. """

    self._artifact_filters = artifact_filters
    self._filter_file = filter_file
    self._source_path = source_path
    self._source_type = self._SOURCE_TYPES.get(source_type, 'UNKNOWN')