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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 FormatProblem(self, d=None):
 """Return a text string describing the problem. Args: d: map returned by GetDictToFormat with with formatting added """

    if not d:
      d = self.GetDictToFormat()

    output_error_text = self.__class__.ERROR_TEXT % d
    if ('reason' in d) and d['reason']:
      return '%s\n%s' % (output_error_text, d['reason'])
    else:
      return output_error_text