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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 decode(string, encoding=None, errors=None):
 """Decode from specified encoding. ``encoding`` defaults to the preferred encoding. ``errors`` defaults to the preferred error handler. """

    if encoding is None:
        encoding = getpreferredencoding()
    if errors is None:
        errors = getpreferrederrors()
    return string.decode(encoding, errors)