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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 save_script_rc(script_path="scripts/scriptrc", **env_vars):
 """ Write an rc file in the charm-delivered directory containing exported environment variables provided by env_vars. Any charm scripts run outside the juju hook environment can source this scriptrc to obtain updated config information necessary to perform health checks or service changes. """

    juju_rc_path = "%s/%s" % (charm_dir(), script_path)
    if not os.path.exists(os.path.dirname(juju_rc_path)):
        os.mkdir(os.path.dirname(juju_rc_path))
    with open(juju_rc_path, 'wt') as rc_script:
        rc_script.write(
            "#!/bin/bash\n")
        [rc_script.write('export %s=%s\n' % (u, p))
         for u, p in six.iteritems(env_vars) if u != "script_path"]