Update URL parameters in Python 3.

change-url-parameters.py

import urllib.parse

url = "http://stackoverflow.com/search?q=question"
params = {'lang':'en','tag':'python'}

url_parts = list(urllib.parse.urlparse(url))
query = dict(urllib.parse.parse_qsl(url_parts[4]))
query.update(params)

url_parts[4] = urllib.parse.urlencode(query)

print(urllib.parse.urlunparse(url_parts))

furl is better

I think is more explicit to use url_parts.query instead of url_parts[4]

import urllib.parse

url = "http://stackoverflow.com/search?q=question"
params = {'lang':'en','tag':'python'}

url_parts = urllib.parse.urlparse(url)
query = dict(urllib.parse.parse_qsl(url_parts.query))
query.update(params)

new_url = url_parts._replace(query=urllib.parse.urlencode(query)).geturl()

Thanks man! you the goat! 🚀

Fixed version:

import urllib.parse

url = "http://stackoverflow.com/search?q=question"
params = {'lang':'en','tag':'python'}

url_parts = urllib.parse.urlparse(url)
query = urllib.parse.parse_qs(url_parts.query, keep_blank_values=True)
query.update(params)

new_url = url_parts._replace(query=urllib.parse.urlencode(query, doseq=True)).geturl()