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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 is_zipfile(filename):
 """Quickly see if file is a ZIP file by checking the magic number."""

    try:
        fpin = open(filename, "rb")
        endrec = _EndRecData(fpin)
        fpin.close()
        if endrec:
            return True                 # file has correct magic number
    except IOError:
        pass
    return False