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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 p7zip_supports_rar():
 """Determine if the RAR codec is installed for 7z program."""

    if os.name == 'nt':
        # Assume RAR support is compiled into the binary.
        return True
    # the subdirectory and codec name
    codecname = 'p7zip/Codecs/Rar29.so'
    # search canonical user library dirs
    for libdir in ('/usr/lib', '/usr/local/lib', '/usr/lib64', '/usr/local/lib64', '/usr/lib/i386-linux-gnu', '/usr/lib/x86_64-linux-gnu'):
        fname = os.path.join(libdir, codecname)
        if os.path.exists(fname):
            return True
    return False