Tuesday, February 1, 2022

[SOLVED] global name '_dlopen' is not defined

Issue

I'm using GAE sandbox on Windows, python 2.7 and virtualenv. When I try to use Requests lib, I'm getting the following error:

global name '_dlopen' is not defined

Full stack:

INFO     2017-09-20 13:40:20,551 module.py:821] default: "GET / HTTP/1.1" 500 
        from ctypes import (c_buffer, POINTER, byref, create_unicode_buffer,
    File "c:\python27\Lib\ctypes\__init__.py", line 450, in <module>
        pythonapi = PyDLL(None)
    File "c:\python27\Lib\ctypes\__init__.py", line 362, in __init__
        self._handle = _dlopen(self._name, mode)
    NameError: global name '_dlopen' is not defined

GAE on windows did have issues with loading ctypes and and winreg but it's now whitelisted on development environment automatically.

What am I missing?


Solution

So I found what caused the issue: It was the workaround suggested in https://stackoverflow.com/a/25915535/3767514

The problem was that changing os.name=None meant ctypes cannot use the correct dll load library.

ctypes init line 457:

if _os.name in ("nt", "ce"):
windll = LibraryLoader(WinDLL)

so the solution was importing ctypes before changing the os.name to None in appengine_config.py:

import os
if os.name == 'nt':
import ctypes
os.name = None


Answered By - Crispy Holiday
Answer Checked By - Mildred Charles (WPSolving Admin)
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