Add the line Run pip install Flask in Dockerfile #2
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When running the container on myfirstapp image, you will get the following error
docker container run -p 8888:5000 --name myfirstapp myfirstapp
Traceback (most recent call last):
File "/usr/src/app/app.py", line 2, in <module>
from flask import Flask
File "/usr/local/lib/python3.10/dist-packages/flask/__init__.py", line 19, in <module>
from jinja2 import Markup, escape
ImportError: cannot import name 'Markup' from 'jinja2' (/usr/local/lib/python3.10/dist-packages/jinja2/__init__.py)
The solution is
1-add the following line in Dockerfile
RUN pip install Flask
under
# Install python and pip
RUN apt-get update -y
RUN apt-get install -y python3 python3-pip python3-dev build-essential.
2- Update the requirements.txt
Flask==2 instead Flask==1.0
3.- add the -d flag to the command docker container run -p 8888:5000 --name myfirstapp myfirstapp to let it run in the background
docker container run -d -p 8888:5000 --name myfirstapp myfirstapp
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When running the container on myfirstapp image, you will get the following error
docker container run -p 8888:5000 --name myfirstapp myfirstapp
Traceback (most recent call last):
File "/usr/src/app/app.py", line 2, in
from flask import Flask
File "/usr/local/lib/python3.10/dist-packages/flask/init.py", line 19, in
from jinja2 import Markup, escape
ImportError: cannot import name 'Markup' from 'jinja2' (/usr/local/lib/python3.10/dist-packages/jinja2/init.py)
The solution is
1-add the following line in Dockerfile
RUN pip install Flask
under
Install python and pip
2- Update the requirements.txt
Flask==2 instead Flask==1.0
3.- add the -d flag to the command docker container run -p 8888:5000 --name myfirstapp myfirstapp to let it run in the background
docker container run -d -p 8888:5000 --name myfirstapp myfirstapp