ImportError:无法从其中导入名称“json”
我试图让一个Flask和Docker应用程序工作，但是当我尝试使用Visual终端中的docker-compose up命令运行它时，它给了我一个名为ImportError: cannot import name 'json' from itsdangerous的ImportError。我曾试图寻找解决这一问题的可能办法，但到目前为止，这里或任何其他地方都没有多少解决办法。我能找到的唯一两种解决方案是将MarkupSafe及其危险的当前安装更改为更高的版本：https://serverfault.com/questions/1094062/from-itsdangerous-import-json-as-json-importerror-cannot-import-name-json-fr和GitHub上的另一个解决方案告诉我从本质上更改MarkUpSafe及其危险的安装-- https://github.com/aws/aws-sam-cli/issues/3661。我还尝试创建一个名为veganetworkscriptenv的虚拟环境来安装软件包，但也失败了。我目前使用的是Flas2.0.0和Docker5.0.0，错误发生在vegamain.py的第8行。
下面是我尝试运行程序时得到的完整ImportError：
veganetworkscript-backend-1 | Traceback (most recent call last):
veganetworkscript-backend-1 | File "/app/vegamain.py", line 8, in <module>
veganetworkscript-backend-1 | from flask import Flask
veganetworkscript-backend-1 | File "/usr/local/lib/python3.9/site-packages/flask/__init__.py", line 19, in <module>
veganetworkscript-backend-1 | from . import json
veganetworkscript-backend-1 | File "/usr/local/lib/python3.9/site-packages/flask/json/__init__.py", line 15, in <module>
veganetworkscript-backend-1 | from itsdangerous import json as _json
veganetworkscript-backend-1 | ImportError: cannot import name 'json' from 'itsdangerous' (/usr/local/lib/python3.9/site-packages/itsdangerous/__init__.py)
veganetworkscript-backend-1 exited with code 1下面是我的requirements.txt、vegamain.py、Dockerfile和docker-compose.yml文件：
requirements.txt：
Flask==2.0.0
Flask-SQLAlchemy==2.4.4
SQLAlchemy==1.3.20
Flask-Migrate==2.5.3
Flask-Script==2.0.6
Flask-Cors==3.0.9
requests==2.25.0
mysqlclient==2.0.1
pika==1.1.0
wolframalpha==4.3.0vegamain.py：
# Veganetwork (C) TetraSystemSolutions 2022
# all rights are reserved.
#
# Author: Trevor R. Blanchard Feb-19-2022-Jul-30-2022
#
# get our imports in order first
from flask import Flask # <-- error occurs here!!!
# start the application through flask.
app = Flask(__name__)
# if set to true will return only a "Hello World" string.
Debug = True
# start a route to the index part of the app in flask.
@app.route('/')
def index():
if (Debug == True):
return 'Hello World!'
else:
pass
# start the flask app here --->
if __name__ == '__main__':
app.run(debug=True, host='0.0.0.0') Dockerfile：
FROM python:3.9
ENV PYTHONUNBUFFERED 1
WORKDIR /app
COPY requirements.txt /app/requirements.txt
RUN pip install -r requirements.txt
COPY . /appdocker-compose.yml：
version: '3.8'
services:
backend:
build:
context: .
dockerfile: Dockerfile
command: 'python vegamain.py'
ports:
- 8004:5000
volumes:
- .:/app
depends_on:
- db
# queue:
# build:
# context: .
# dockerfile: Dockerfile
# command: 'python -u consumer.py'
# depends_on:
# - db
db:
image: mysql:5.7.22
restart: always
environment:
MYSQL_DATABASE: admin
MYSQL_USER: root
MYSQL_PASSWORD: root
MYSQL_ROOT_PASSWORD: root
volumes:
- .dbdata:/var/lib/mysql
ports:
- 33069:3306我怎样才能确切地修正这段代码？谢谢!
https://stackoverflow.com/questions/71189819
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