Merge query to url (python 2.7.13)

append_query_to_url.py

import urlparse

def merge_query_to_url(url, query):
    """Merge query into url without any url encode/decode."""
    url_parts = urlparse.urlparse(url)

    # convert existing query string to dict
    #
    # Not using `urlparse.parse_qs` to extract existing query from url because
    # it will convert url's query to utf8 string if it's url encoded
    query_to_update = {}
    for query_segments in url_parts.query.split('&'):
        query_pair = query_segments.split('=')
        if len(query_pair) == 2:
            query_to_update[query_pair[0]] = query_pair[1]

    # merge query parameter into existing query
    query_to_update.update(query)

    # convert new query to query string
    #
    # Not using `urllib.urlencode` to convert updated query to query string because
    # it does not accepts any unicode string in it's input dict, and will url encode
    # the input query
    query_segments = []
    for key, value in query_to_update.iteritems():
        query_segments.append('{}={}'.format(key, value))
    query_string = '&'.join(query_segments)

    new_url_parts = url_parts._replace(query=query_string)
    return urlparse.urlunparse(new_url_parts)