pythonanywhere virtualenv 软件包未导入 Flask 应用程序

Question

我是 pythonanywhere 的新手，我正在尝试设置一个 Flask Web 应用程序。

我正在使用虚拟环境：

/home/SpaceMeerkat/.virtualenvs/flaskenv

当我激活 venv 并运行时：

from werkzeug.urls import url_quote
from flask import Flask, g
import pandas as pd

...软件包已导入，没有错误。

但是，当我使用 WSGI 脚本运行我的 Web 应用程序时：

import sys

path = '/home/SpaceMeerkat/4211-IOMS/thredspace'
if path not in sys.path:
    sys.path.append(path)
#
from __init__ import create_app  # noqa
app = create_app()

调用脚本：

import os
from flask import Flask, g
from flask_cors import CORS
import pandas as pd

# =============================================================================
# Setup app config
# =============================================================================

def create_app(test_config=None):
    
    app = Flask(__name__, instance_relative_config=True)
    CORS(app)
    
    app.config.from_mapping(
        SECRET_KEY='dev',
        DATABASE=os.path.join(app.instance_path, 'thredspace.sqlite'),
    )
    
    if test_config is None:
        app.config.from_pyfile('config.py', silent=True)
    else:
        app.config.from_mapping(test_config)
        
    try:
        os.makedirs(app.instance_path)
    except OSError:
        pass
    
    from . import home
    app.register_blueprint(home.bp)
    
    from . import db
    db.init_app(app)
    
    from . import auth
    app.register_blueprint(auth.bp)
    
    from .templates.creation_suite import project_management
    app.register_blueprint(project_management.bp)
    
    return app

我遇到这样的错误：

2023-11-24 15:34:44,071: Error running WSGI application
2023-11-24 15:34:44,078: ImportError: cannot import name 'url_quote' from 'werkzeug.urls' (/home/SpaceMeerkat/.virtualenvs/flaskenv/lib/python3.10/site-packages/werkzeug/urls.py)
2023-11-24 15:34:44,078:   File "/var/www/spacemeerkat_pythonanywhere_com_wsgi.py", line 79, in <module>
2023-11-24 15:34:44,079:     from thredspace.main_flask_app_file import app as application  # noqa
2023-11-24 15:34:44,079: 
2023-11-24 15:34:44,079:   File "/home/SpaceMeerkat/4211-IOMS/thredspace/__init__.py", line 14, in <module>
2023-11-24 15:34:44,079:     from flask import Flask, g
2023-11-24 15:34:44,079: 
2023-11-24 15:34:44,079:   File "/home/SpaceMeerkat/.virtualenvs/flaskenv/lib/python3.10/site-packages/flask/__init__.py", line 5, in <module>
2023-11-24 15:34:44,079:     from .app import Flask as Flask
2023-11-24 15:34:44,079: 
2023-11-24 15:34:44,079:   File "/home/SpaceMeerkat/.virtualenvs/flaskenv/lib/python3.10/site-packages/flask/app.py", line 30, in <module>
2023-11-24 15:34:44,079:     from werkzeug.urls import url_quote

和

2023-11-24 15:49:54,151: Error running WSGI application
2023-11-24 15:49:54,152: ModuleNotFoundError: No module named 'pandas'
2023-11-24 15:49:54,152:   File "/var/www/spacemeerkat_pythonanywhere_com_wsgi.py", line 79, in <module>
2023-11-24 15:49:54,152:     from thredspace.main_flask_app_file import app as application  # noqa
2023-11-24 15:49:54,152: 
2023-11-24 15:49:54,152:   File "/home/SpaceMeerkat/4211-IOMS/thredspace/__init__.py", line 16, in <module>
2023-11-24 15:49:54,152:     import pandas as pd

virtualenv 已正确指向，因此应该可以找到包，但由于某种原因

pandas

没有找到。

我检查了

Werkzeug

与 Flask 的兼容性，因为众所周知的问题，您往往必须匹配它们。

为了确定起见，我什至将它们回滚到

Werkzeug==2.3.7

和

Flask==2.1.3

。

我在做一些极其愚蠢的事情吗？因为据我所知，错误日志显示它正在使用正确的 virtualenv，但事实上没有找到它们，这真的很奇怪。我确实想知道尝试运行

__init__

文件来实例化应用程序是否是一个坏主意，并且可能是一个问题。

Answer 1

请注意，此问题已得到解决。 WSGI 脚本严格要求应用程序是一个名为“application”的变量。

请参阅此论坛帖子。