Should itsdangerous and Jinja2 be installed in Dockerfile (Chapter 12, Section 6)? #4
Description
Problem
In the Chapter 12, Section 6, docker-compose reports error for app_1.
app_1 | Traceback (most recent call last):
app_1 | File "/app/tracking.py", line 3, in <module>
app_1 | from flask import Flask, request, Response
app_1 | File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 14, in <module>
app_1 | from jinja2 import escape
app_1 | ImportError: cannot import name 'escape' from 'jinja2' (/usr/local/lib/python3.9/site-packages/jinja2/__init__.py)
Suggestion
I think that itsdangerous and Jinja2 should be installed explicitly like below (c.f. Flask issue).
RUN pip install \
Flask==1.1.2 \
redis==3.5.3 \
Flask_Injector==0.12.3 \
prometheus-client==0.10.1 \
jaeger-client==4.4.0 \
opentracing==2.4.0 \
'Werkzeug<2.0.0' \
Flask-OpenTracing==1.1.0 \
itsdangerous==2.0.1 \
Jinja2==3.0.3
(The versions of its dangerous and Jinja2 are just example. No specific reason.)
With this change, the docker-compose error resolved and API request(http://localhost:8000/test) succeeded