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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 os_info():
 """Returns os data. """

    return {
        'uname': dict(platform.uname()._asdict()),
        'path': os.environ.get('PATH', '').split(':'),
        'shell': os.environ.get('SHELL', '/bin/sh'),
    }