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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 _getPaddingToSectionOffset(self):
 """ Returns the offset to last section header present in the PE file. @rtype: int @return: The offset where the end of the last section header resides in the PE file. """

        return len(str(self.dosHeader) + str(self.dosStub) + str(self.ntHeaders) + str(self.sectionHeaders))