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QUESTION

Python/Docker ImportError: cannot import name 'json' from itsdangerous

Asked 2022-Mar-31 at 12:49

I am trying to get a Flask and Docker application to work but when I try and run it using my docker-compose up command in my Visual Studio terminal, it gives me an ImportError called ImportError: cannot import name 'json' from itsdangerous. I have tried to look for possible solutions to this problem but as of right now there are not many on here or anywhere else. The only two solutions I could find are to change the current installation of MarkupSafe and itsdangerous to a higher version: https://serverfault.com/questions/1094062/from-itsdangerous-import-json-as-json-importerror-cannot-import-name-json-fr and another one on GitHub that tells me to essentially change the MarkUpSafe and itsdangerous installation again https://github.com/aws/aws-sam-cli/issues/3661, I have also tried to make a virtual environment named veganetworkscriptenv to install the packages but that has also failed as well. I am currently using Flask 2.0.0 and Docker 5.0.0 and the error occurs on line eight in vegamain.py.

Here is the full ImportError that I get when I try and run the program:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10

Here are my requirements.txt, vegamain.py, Dockerfile, and docker-compose.yml files:

requirements.txt:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20

vegamain.py:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20# Veganetwork (C) TetraSystemSolutions 2022
21# all rights are reserved.  
22# 
23# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
24#
25
26# get our imports in order first
27from flask import Flask # <-- error occurs here!!!
28
29# start the application through flask.
30app = Flask(__name__)
31
32# if set to true will return only a "Hello World" string.
33Debug = True
34
35# start a route to the index part of the app in flask.
36@app.route('/')
37def index():
38    if (Debug == True):
39        return 'Hello World!'
40    else:
41        pass
42
43# start the flask app here --->
44if __name__ == '__main__':
45    app.run(debug=True, host='0.0.0.0') 
46

Dockerfile:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20# Veganetwork (C) TetraSystemSolutions 2022
21# all rights are reserved.  
22# 
23# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
24#
25
26# get our imports in order first
27from flask import Flask # <-- error occurs here!!!
28
29# start the application through flask.
30app = Flask(__name__)
31
32# if set to true will return only a "Hello World" string.
33Debug = True
34
35# start a route to the index part of the app in flask.
36@app.route('/')
37def index():
38    if (Debug == True):
39        return 'Hello World!'
40    else:
41        pass
42
43# start the flask app here --->
44if __name__ == '__main__':
45    app.run(debug=True, host='0.0.0.0') 
46FROM python:3.9
47ENV PYTHONUNBUFFERED 1
48WORKDIR /app
49COPY requirements.txt /app/requirements.txt
50RUN pip install -r requirements.txt
51COPY . /app
52

docker-compose.yml:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20# Veganetwork (C) TetraSystemSolutions 2022
21# all rights are reserved.  
22# 
23# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
24#
25
26# get our imports in order first
27from flask import Flask # <-- error occurs here!!!
28
29# start the application through flask.
30app = Flask(__name__)
31
32# if set to true will return only a "Hello World" string.
33Debug = True
34
35# start a route to the index part of the app in flask.
36@app.route('/')
37def index():
38    if (Debug == True):
39        return 'Hello World!'
40    else:
41        pass
42
43# start the flask app here --->
44if __name__ == '__main__':
45    app.run(debug=True, host='0.0.0.0') 
46FROM python:3.9
47ENV PYTHONUNBUFFERED 1
48WORKDIR /app
49COPY requirements.txt /app/requirements.txt
50RUN pip install -r requirements.txt
51COPY . /app
52version: '3.8'
53services:
54  backend:
55    build:
56      context: .
57      dockerfile: Dockerfile
58    command: 'python vegamain.py'
59    ports:
60      - 8004:5000
61    volumes:
62      - .:/app
63    depends_on:
64      - db
65
66#  queue:
67#    build:
68#      context: .
69#      dockerfile: Dockerfile
70#    command: 'python -u consumer.py'
71#    depends_on:
72#      - db
73
74  db:
75    image: mysql:5.7.22
76    restart: always
77    environment:
78      MYSQL_DATABASE: admin
79      MYSQL_USER: root
80      MYSQL_PASSWORD: root
81      MYSQL_ROOT_PASSWORD: root
82    volumes:
83      - .dbdata:/var/lib/mysql
84    ports:
85      - 33069:3306
86

How exactly can I fix this code? thank you!

ANSWER

Answered 2022-Feb-20 at 12:31

I was facing the same issue while running docker containers with flask.

I downgraded Flask to 1.1.4 and markupsafe to 2.0.1 which solved my issue.

Check this for reference.

Source https://stackoverflow.com/questions/71189819

Community Discussions contain sources that include Stack Exchange Network

    Python/Docker ImportError: cannot import name 'json' from itsdangerous
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    Does docker-compose support init container?

QUESTION

Python/Docker ImportError: cannot import name 'json' from itsdangerous

Asked 2022-Mar-31 at 12:49

I am trying to get a Flask and Docker application to work but when I try and run it using my docker-compose up command in my Visual Studio terminal, it gives me an ImportError called ImportError: cannot import name 'json' from itsdangerous. I have tried to look for possible solutions to this problem but as of right now there are not many on here or anywhere else. The only two solutions I could find are to change the current installation of MarkupSafe and itsdangerous to a higher version: https://serverfault.com/questions/1094062/from-itsdangerous-import-json-as-json-importerror-cannot-import-name-json-fr and another one on GitHub that tells me to essentially change the MarkUpSafe and itsdangerous installation again https://github.com/aws/aws-sam-cli/issues/3661, I have also tried to make a virtual environment named veganetworkscriptenv to install the packages but that has also failed as well. I am currently using Flask 2.0.0 and Docker 5.0.0 and the error occurs on line eight in vegamain.py.

Here is the full ImportError that I get when I try and run the program:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10

Here are my requirements.txt, vegamain.py, Dockerfile, and docker-compose.yml files:

requirements.txt:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20

vegamain.py:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20# Veganetwork (C) TetraSystemSolutions 2022
21# all rights are reserved.  
22# 
23# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
24#
25
26# get our imports in order first
27from flask import Flask # <-- error occurs here!!!
28
29# start the application through flask.
30app = Flask(__name__)
31
32# if set to true will return only a "Hello World" string.
33Debug = True
34
35# start a route to the index part of the app in flask.
36@app.route('/')
37def index():
38    if (Debug == True):
39        return 'Hello World!'
40    else:
41        pass
42
43# start the flask app here --->
44if __name__ == '__main__':
45    app.run(debug=True, host='0.0.0.0') 
46

Dockerfile:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20# Veganetwork (C) TetraSystemSolutions 2022
21# all rights are reserved.  
22# 
23# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
24#
25
26# get our imports in order first
27from flask import Flask # <-- error occurs here!!!
28
29# start the application through flask.
30app = Flask(__name__)
31
32# if set to true will return only a "Hello World" string.
33Debug = True
34
35# start a route to the index part of the app in flask.
36@app.route('/')
37def index():
38    if (Debug == True):
39        return 'Hello World!'
40    else:
41        pass
42
43# start the flask app here --->
44if __name__ == '__main__':
45    app.run(debug=True, host='0.0.0.0') 
46FROM python:3.9
47ENV PYTHONUNBUFFERED 1
48WORKDIR /app
49COPY requirements.txt /app/requirements.txt
50RUN pip install -r requirements.txt
51COPY . /app
52

docker-compose.yml:

1veganetworkscript-backend-1  | Traceback (most recent call last):
2veganetworkscript-backend-1  |   File "/app/vegamain.py", line 8, in <module>
3veganetworkscript-backend-1  |     from flask import Flask
4veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
5veganetworkscript-backend-1  |     from . import json
6veganetworkscript-backend-1  |   File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
7veganetworkscript-backend-1  |     from itsdangerous import json as _json
8veganetworkscript-backend-1  | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
9veganetworkscript-backend-1 exited with code 1
10Flask==2.0.0
11Flask-SQLAlchemy==2.4.4
12SQLAlchemy==1.3.20
13Flask-Migrate==2.5.3
14Flask-Script==2.0.6
15Flask-Cors==3.0.9
16requests==2.25.0
17mysqlclient==2.0.1
18pika==1.1.0
19wolframalpha==4.3.0
20# Veganetwork (C) TetraSystemSolutions 2022
21# all rights are reserved.  
22# 
23# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
24#
25
26# get our imports in order first
27from flask import Flask # <-- error occurs here!!!
28
29# start the application through flask.
30app = Flask(__name__)
31
32# if set to true will return only a "Hello World" string.
33Debug = True
34
35# start a route to the index part of the app in flask.
36@app.route('/')
37def index():
38    if (Debug == True):
39        return 'Hello World!'
40    else:
41        pass
42
43# start the flask app here --->
44if __name__ == '__main__':
45    app.run(debug=True, host='0.0.0.0') 
46FROM python:3.9
47ENV PYTHONUNBUFFERED 1
48WORKDIR /app
49COPY requirements.txt /app/requirements.txt
50RUN pip install -r requirements.txt
51COPY . /app
52version: '3.8'
53services:
54  backend:
55    build:
56      context: .
57      dockerfile: Dockerfile
58    command: 'python vegamain.py'
59    ports:
60      - 8004:5000
61    volumes:
62      - .:/app
63    depends_on:
64      - db
65
66#  queue:
67#    build:
68#      context: .
69#      dockerfile: Dockerfile
70#    command: 'python -u consumer.py'
71#    depends_on:
72#      - db
73
74  db:
75    image: mysql:5.7.22
76    restart: always
77    environment:
78      MYSQL_DATABASE: admin
79      MYSQL_USER: root
80      MYSQL_PASSWORD: root
81      MYSQL_ROOT_PASSWORD: root
82    volumes:
83      - .dbdata:/var/lib/mysql
84    ports:
85      - 33069:3306
86

How exactly can I fix this code? thank you!

ANSWER

Answered 2022-Feb-20 at 12:31

I was facing the same issue while running docker containers with flask.

I downgraded Flask to 1.1.4 and markupsafe to 2.0.1 which solved my issue.

Check this for reference.

Source https://stackoverflow.com/questions/71189819