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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 wrsamp(self, write_dir=''):
 """ Write a multi-segment header, along with headers and dat files for all segments, from this object. """

        # Perform field validity and cohesion checks, and write the
        # header file.
        self.wrheader(write_dir=write_dir)
        # Perform record validity and cohesion checks, and write the
        # associated segments.
        for seg in self.segments:
            seg.wrsamp(write_dir=write_dir)