python network_error ai_generated true

aiohttp.client_exceptions.ClientResponseError: 404, message='Not Found', url=URL('http://example.com/nonexistent')

ID: python/aiohttp-client-http-error

Also available as: JSON · Markdown · 中文
80%Fix Rate
86%Confidence
0Evidence
2025-06-01First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
3.7 active — — —
3.8 active — — —

Root Cause

The server returns a 4xx or 5xx status code, and aiohttp raises an exception if raise_for_status is called.

generic

中文

服务器返回4xx或5xx状态码，如果调用raise_for_status，aiohttp会引发异常。

Workarounds

  1. 95% success 
    if resp.status != 200: raise Exception(f'HTTP {resp.status}')
  2. 90% success 
    try: resp.raise_for_status() except aiohttp.ClientResponseError as e: print(e.status)

Dead Ends

Common approaches that don't work:

  1. 60% fail

    The error is raised by raise_for_status(); if you don't call it, no exception occurs.

  2. 80% fail

    The resource doesn't exist; changing method won't help.