Stuck at Flask-2.2.5 with urllib3-1.26.15 -- Flask-2.3.x with urllib3-1.xx or 2.xx dont work #5115

EverybodyGetsHurt · 2023-05-04T14:42:16Z

EverybodyGetsHurt
May 4, 2023

Hi,

I was wondering if I am the only one running into this and its something specific in my case, or if its something else with Flask, or urllib3.
The issue I run into is that updating Flask higher then 2.2.5, will break the application.
I tried every version we have above 2.2.5, combined with urllib3 v1.26.15 and v2.0.2, but no combination works.

These are all the packages in my project (I am using Pycharm Pro lastest version if anyone needs to know):

certifi==2022.12.7
charset-normalizer==3.1.0
click==8.1.3
colorama==0.4.6
dnspython==2.3.0
email-validator==2.0.0.post2
Flask-Login==0.6.2
Flask-SQLAlchemy==3.0.3
Flask-WTF==1.1.1
Flask==2.2.5
greenlet==2.0.2
httplib2==0.22.0
idna==3.4
itsdangerous==2.1.2
Jinja2==3.1.2
MarkupSafe==2.1.2
oauth2==1.9.0.post1
oauthlib==3.2.2
Pillow==9.5.0
pip==23.1.2
pyparsing==3.0.9
requests-oauthlib==1.3.1
requests==2.30.0
setuptools==67.7.2
SQLAlchemy==2.0.12
typing-extensions==4.5.0
urllib3==1.26.15
Werkzeug==2.3.3
wheel==0.40.0
WTForms==3.0.1

When I try Flask 2.3.x with urllib3 1.26.15 I get the following error:

FLASK_APP = app.py
FLASK_ENV = development
FLASK_DEBUG = 1

In folder C:/CODE_REPO/Flask-v0.1.x/Flask-v0.1.4

C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Scripts\python.exe -m flask run --host=127.0.0.1 --port=443 --debug --cert=cert.pem --key=key.pem 
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\__main__.py", line 3, in <module>
    main()
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 1063, in main
    cli.main()
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 1055, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 760, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\decorators.py", line 84, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 760, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 911, in run_command
    raise e from None
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 897, in run_command
    app = info.load_app()
          ^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 308, in load_app
    app = locate_app(import_name, name)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 235, in locate_app
    return find_best_app(module)
           ^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 63, in find_best_app
    app = app_factory()
          ^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\webapp\__init__.py", line 19, in create_app
    from .oauth10a import oauth10a
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\webapp\oauth10a.py", line 11, in <module>
    from flask.json import JSONEncoder
ImportError: cannot import name 'JSONEncoder' from 'flask.json' (C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\json\__init__.py)

Process finished with exit code 1

EDIT: Somehow the path's are incorrect because Github doesnt like _ _ so here a screenshot:

When I try Flask 2.3.x with urllib3 2.0.2 we get these warnings:

FLASK_APP = app.py
FLASK_ENV = development
FLASK_DEBUG = 1

In folder C:/CODE_REPO/Flask-v0.1.x/Flask-v0.1.4

C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Scripts\python.exe -m flask run --host=127.0.0.1 --port=443 --debug --cert=cert.pem --key=key.pem 
C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\requests\__init__.py:109: RequestsDependencyWarning: urllib3 (2.0.2) or chardet (None)/charset_normalizer (3.1.0) doesn't match a supported version!
  warnings.warn(
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\__main__.py", line 3, in <module>
    main()
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 1063, in main
    cli.main()
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 1055, in main
    rv = self.invoke(ctx)
         ^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 1657, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 1404, in invoke
    return ctx.invoke(self.callback, **ctx.params)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 760, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\decorators.py", line 84, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\click\core.py", line 760, in invoke
    return __callback(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 911, in run_command
    raise e from None
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 897, in run_command
    app = info.load_app()
          ^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 308, in load_app
    app = locate_app(import_name, name)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 235, in locate_app
    return find_best_app(module)
           ^^^^^^^^^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\cli.py", line 63, in find_best_app
    app = app_factory()
          ^^^^^^^^^^^^^
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\webapp\__init__.py", line 19, in create_app
    from .oauth10a import oauth10a
  File "C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\webapp\oauth10a.py", line 11, in <module>
    from flask.json import JSONEncoder
ImportError: cannot import name 'JSONEncoder' from 'flask.json' (C:\CODE_REPO\Flask-v0.1.x\Flask-v0.1.4\venv\Lib\site-packages\flask\json\__init__.py)

Process finished with exit code 1

I didnt try asking at urllib yet, I'm trying here first because it seems to be venv\Lib\site-packages\flask\json\init.py that exits with code 1.

EDIT: Somehow the path's that I post, are shown incorrectly when I apply it. So I added a screenshot to show the correct paths.

Answered by ThiefMaster

May 4, 2023

json_encoder and json_decoder attributes on app and blueprint, and the corresponding json.JSONEncoder and JSONDecoder classes, are removed.

Probably related to this? You need to fix your code which currently tries to import this in webapp/oauth10a.py which seems to be your own code.

View full answer

ThiefMaster · 2023-05-04T15:13:01Z

ThiefMaster
May 4, 2023
Maintainer

json_encoder and json_decoder attributes on app and blueprint, and the corresponding json.JSONEncoder and JSONDecoder classes, are removed.

Probably related to this? You need to fix your code which currently tries to import this in webapp/oauth10a.py which seems to be your own code.

1 reply

EverybodyGetsHurt May 4, 2023
Author

Thanks! I didnt notice this.
Now I got a direction to go again!

EverybodyGetsHurt · 2023-05-04T16:07:48Z

EverybodyGetsHurt
May 4, 2023
Author

json_encoder and json_decoder attributes on app and blueprint, and the corresponding json.JSONEncoder and JSONDecoder classes, are removed.

Probably related to this? You need to fix your code which currently tries to import this in webapp/oauth10a.py which seems to be your own code.

Thank you!

All that needed to be done was changing:
from flask.json import JSONEncoder

To:
from json import JSONEncoder

I feel so stupid I didn't notice using urllib3 v2 told me the issue was my own file.

0 replies

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Stuck at Flask-2.2.5 with urllib3-1.26.15 -- Flask-2.3.x with urllib3-1.xx or 2.xx dont work #5115

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Stuck at Flask-2.2.5 with urllib3-1.26.15 -- Flask-2.3.x with urllib3-1.xx or 2.xx dont work #5115

EverybodyGetsHurt May 4, 2023

Replies: 2 comments · 1 reply

ThiefMaster May 4, 2023 Maintainer

EverybodyGetsHurt May 4, 2023 Author

EverybodyGetsHurt May 4, 2023 Author

EverybodyGetsHurt
May 4, 2023

Replies: 2 comments 1 reply

ThiefMaster
May 4, 2023
Maintainer

EverybodyGetsHurt May 4, 2023
Author

EverybodyGetsHurt
May 4, 2023
Author