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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 ParseInput(self, a_file):
 """Consumes input extracting definitions. Args: a_file: The file like stream to parse. Raises: PDDMError if there are any issues. """

    input_lines = a_file.read().splitlines()
    self.ParseLines(input_lines)