ext.py 文件源码

def urlparams(url_, fragment=None, query_dict=None, **query):
    """
Add a fragment and/or query parameters to a URL.

New query params will be appended to exising parameters, except duplicate
names, which will be replaced.
"""
    url_ = urlparse.urlparse(url_)
    fragment = fragment if fragment is not None else url_.fragment

    q = url_.query
    new_query_dict = (QueryDict(smart_str(q), mutable=True) if
                      q else QueryDict('', mutable=True))
    if query_dict:
        for k, l in query_dict.lists():
            new_query_dict[k] = None  # Replace, don't append.
            for v in l:
                new_query_dict.appendlist(k, v)

    for k, v in query.items():
        # Replace, don't append.
        if isinstance(v, list):
            new_query_dict.setlist(k, v)
        else:
            new_query_dict[k] = v

    query_string = urlencode([(k, v) for k, l in new_query_dict.lists() for
                              v in l if v is not None])
    new = urlparse.ParseResult(url_.scheme, url_.netloc, url_.path,
                               url_.params, query_string, fragment)
    return new.geturl()