I have Flask==1.0.2, Jinja2>=2.10.1 which is dockerized, I am getting below error

  File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base.py", line 146, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/usr/local/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 58, in load
    return self.load_wsgiapp()
  File "/usr/local/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/local/lib/python3.7/site-packages/gunicorn/util.py", line 359, in import_app
    mod = importlib.import_module(module)
  File "/usr/local/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/app/search_service/__init__.py", line 12, in <module>
    from flasgger import Swagger
  File "/usr/local/lib/python3.7/site-packages/flasgger/__init__.py", line 10, in <module>
    from .base import Swagger, Flasgger, NO_SANITIZER, BR_SANITIZER, MK_SANITIZER, LazyJSONEncoder  # noqa
  File "/usr/local/lib/python3.7/site-packages/flasgger/base.py", line 19, in <module>
    from flask import Blueprint
  File "/usr/local/lib/python3.7/site-packages/flask/__init__.py", line 19, in <module>
    from jinja2 import Markup, escape
ImportError: cannot import name 'Markup' from 'jinja2' (/usr/local/lib/python3.7/site-packages/jinja2/__init__.py)

Requirements.txt

attrs>=19.1.0
boto3==1.17.23
click==7.0
itsdangerous==2.0.1
flasgger==0.9.5
Flask==1.0.2
Flask-RESTful>=0.3.6
flask-cors==3.0.8
gunicorn==20.1.0
Jinja2>=2.10.1
jsonschema>=3.0.1,<4.0
marshmallow>=3.0,<=3.6
marshmallow3-annotations>=1.0.0
pytz==2021.1
requests>=2.25.0
requests-aws4auth==1.1.0
statsd==3.2.1
typing==3.6.4
werkzeug>=2.0.0
wheel==0.36.2
itsdangerous==2.0.1

Dockerfile

FROM python:3.7-slim
WORKDIR /app    
COPY ./search/ /app/
COPY requirements.txt /app/requirements.txt
RUN pip3 install --trusted-host pypi.org --trusted-host files.pythonhosted.org --default-timeout=100 -e .
RUN pip3 uninstall jinja2 --yes
RUN pip3 install --trusted-host pypi.org --trusted-host files.pythonhosted.org --default-timeout=100 --upgrade jinja2

It was running fine till yesterday, I started getting this error from today, Tried updating the jinja2 but didn't solve the issue, Please help me resolve this.

Thanks in advance!

CodePudding user response：

Version 3.0.1

Regarding to the documentation

Fixed calling deprecated jinja2.Markup without an argument. Use markupsafe.Markup instead. #1438

So to import Markup use the following code :

>>> from jinja2.utils import markupsafe 
>>> markupsafe.Markup()
Markup('')

CodePudding user response：

The actual version of jinja is 3.x try to update jinja:

Uninstall Jinja2==2.10.1

pip uninstall jinja2

Install the latest version of jinja2

pip install --upgrade jinja2

CodePudding user response：

As the import error comes from flask File "/usr/local/lib/python3.7/site-packages/flask/__init__.py

I tried to create a new Flask application using Flask==1.0.2 and found that the error comes from this version of Flask when it used with Jinja2>=2.10.1.

But when you remove Flask==1.0.2 and install Flask==2.0.3, everything works fine.

pip uninstall  Flask Jinja2

pip install Flask Jinja2

Dependencies

pip freeze

click==8.0.4
Flask==2.0.3
itsdangerous==2.1.2
Jinja2==3.1.1
MarkupSafe==2.1.1
Werkzeug==2.0.3