python - 在 gcloud "ImportError: No module named MySQLdb._mysql"上运行 dev_appserver.py 时出错？

Question

我正在尝试在 Google App Engine 上部署 Python-Flask 应用程序。该应用程序无需 MySQL 即可正常运行。导入 fromflask_mysqldb import MySQL dev_appserver.py 返回错误 ImportError: No module named MySQLdb._mysql

我已经更新了app.yaml和requirements.txt(也尝试了MySQL-python、PyMySQL)

libraries:
- name: MySQLdb
  version: latest

Flask-MySQLdb==0.2.0
mysqlclient==1.4.1

ma​​in.py 的前几行

from flask import Flask, render_template, flash, redirect, url_for, session, logging, request
from flask_mysqldb import MySQL

app = Flask(__name__)

# Config MySQL
app.config['MYSQL_HOST'] = '35.236.72.247'
app.config['MYSQL_USER'] = <removed>
app.config['MYSQL_PASSWORD'] = <removed>
app.config['MYSQL_DB'] = 'myFlaskApp'
app.config['MYSQL_CURSORCLASS'] = 'DictCursor'

# Initialize MySQL
mysql = MySQL(app)

dev_appserver.py app.yaml

的终端转储

INFO     2019-02-09 01:13:00,098 devappserver2.py:278] Skipping SDK update check.
INFO     2019-02-09 01:13:00,172 api_server.py:275] Starting API server at: http://localhost:52922
INFO     2019-02-09 01:13:00,178 dispatcher.py:256] Starting module "default" running at: http://localhost:8080
INFO     2019-02-09 01:13:00,179 admin_server.py:150] Starting admin server at: http://localhost:8000
INFO     2019-02-09 01:13:02,374 instance.py:294] Instance PID: 28866
ERROR    2019-02-09 01:13:04,295 wsgi.py:263]
Traceback (most recent call last):
  File "/Users/zq/Desktop/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 240, in Handle
    handler = _config_handle.add_wsgi_middleware(self._LoadHandler())
  File "/Users/zq/Desktop/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 299, in _LoadHandler
    handler, path, err = LoadObject(self._handler)
  File "/Users/zq/Desktop/google-cloud-sdk/platform/google_appengine/google/appengine/runtime/wsgi.py", line 85, in LoadObject
    obj = __import__(path[0])
  File "/Users/zq/Desktop/Python-Flask/main.py", line 3, in <module>
    from flask_mysqldb import MySQL
  File "/Users/zq/Desktop/Python-Flask/lib/flask_mysqldb/__init__.py", line 1, in <module>
    import MySQLdb
  File "/Users/zq/Desktop/Python-Flask/lib/MySQLdb/__init__.py", line 18, in <module>
    from . import _mysql
  File "/Users/zq/Desktop/google-cloud-sdk/platform/google_appengine/google/appengine/tools/devappserver2/python/runtime/sandbox.py", line 1097, in load_module
    raise ImportError('No module named %s' % fullname)
ImportError: No module named MySQLdb._mysql
INFO     2019-02-09 01:13:04,301 module.py:861] default: "GET / HTTP/1.1" 500 -

我该如何解决这个问题？或者，在我的 Flask 应用程序中使用 MySQL？该应用程序在我的系统上本地使用 MySQL 运行良好。

Answer 1

git rm -f <project-dir>/lib/MySQLdb

gcloud app deploy

删除了 lib/MysqlDB 并将其再次推送到谷歌云，它起作用了。显然，我的本地库与 AppEngine 的 native mysqldb 发生冲突。

现在我不再需要运行 dev_appserver.py app.yaml