utils.py 文件源码

def _extract_services_list_helper(services):
    """Extract a OrderedDict of {service: [ports]} of the supplied services
    for use by the other functions.

    The services object can either be:
      - None : no services were passed (an empty dict is returned)
      - a list of strings
      - A dictionary (optionally OrderedDict) {service_name: {'service': ..}}
      - An array of [{'service': service_name, ...}, ...]

    @param services: see above
    @returns OrderedDict(service: [ports], ...)
    """
    if services is None:
        return {}
    if isinstance(services, dict):
        services = services.values()
    # either extract the list of services from the dictionary, or if
    # it is a simple string, use that. i.e. works with mixed lists.
    _s = OrderedDict()
    for s in services:
        if isinstance(s, dict) and 'service' in s:
            _s[s['service']] = s.get('ports', [])
        if isinstance(s, str):
            _s[s] = []
    return _s