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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 close(self, name=None):
 """Closes the most recently opened element. :name: if given, this value must match the name given for the most recently opened element. This is primarily here for providing quick error checking for applications """

    tag = self._open_elements.pop()
    if name is not None and name != tag:
      raise Exception("Tag closing mismatch")
    self._pad()
    self._writer.endElement(_normalize_name(tag))
    self._newline()