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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 get_all_pipelines(app=''):
 """Get a list of all the Pipelines in _app_. Args: app (str):
 Name of Spinnaker Application. Returns: requests.models.Response: Response from Gate containing Pipelines. """

    url = '{host}/applications/{app}/pipelineConfigs'.format(host=API_URL, app=app)
    response = requests.get(url, verify=GATE_CA_BUNDLE, cert=GATE_CLIENT_CERT)

    assert response.ok, 'Could not retrieve Pipelines for {0}.'.format(app)

    pipelines = response.json()
    LOG.debug('Pipelines:\n%s', pipelines)

    return pipelines