Bad proxy URL format in Requests

Bad proxy URL format

$ python -c "import requests; requests.get('https://example.com', proxies={'http': 'http//proxy:8080'})"
Traceback (most recent call last):
  File "<string>", line 1, in <module>
requests.exceptions.ProxyError: Failed to parse: http//proxy:8080

Why this happens

Proxy URLs must include a valid scheme (http, https, socks5) and proper syntax. Missing colon after scheme, missing credentials delimiter, or absent host/port causes parsing errors.

Fix

Provide a correctly formatted proxy URL. Use scheme://host:port and include credentials as user:pass@ when needed.

Wrong code

import requests
proxies = {
    'http': 'http//proxy:8080',  # missing ':' after 'http'
}
requests.get('https://example.com', proxies=proxies)

Fixed code

import requests
proxies = {
    'http': 'http://proxy.local:8080',
    'https': 'http://proxy.local:8080',
}
resp = requests.get('https://example.com', proxies=proxies, timeout=5)
print(resp.status_code)

With credentials and SOCKS

import requests
proxies = {
    'http': 'socks5://user:[email protected]:1080',
    'https': 'socks5://user:[email protected]:1080',
}
resp = requests.get('https://example.com', proxies=proxies)
print(resp.ok)