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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 print_version(ctx, value):
 """Print the current version of sandman and exit."""

    if not value:
        return
    import pkg_resources
    version = None
    try:
        version = pkg_resources.get_distribution('sandman').version
    finally:
        del pkg_resources
    click.echo(version)
    ctx.exit()