<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def version():
 """Show pbs version."""

    try:
        import pkg_resources
        click.echo(pkg_resources.get_distribution('pybossa-pbs').version)
    except ImportError:
        click.echo("pybossa-pbs package not found!")