【Django×Google App Engine】No module named 'MySQLdb' when deploying - django

Question

I'm setting GitHub source ↓
https://github.com/priyankavergadia/Django-Dialogflow-GoogleVisionAPI
But I have trouble in [Deploy the app to the App Engine standard environment] phase.
At a glance Deploying have been done well.But I'm trying to access webservice, so [502 Bad Gateway] appears.
At local environment(running python manage.py runserver), this program works well.
Please give me some advices.
My environment:
Windows10
Python 3.7.3 (default, Mar 27 2019, 17:13:21) [MSC v.1915 64 bit (AMD64)] :: Anaconda, Inc. on win32
django 2.2.4
MySQL second generation 5.7
mysql django
I serched and tried to:
install mysqlclient and uninstall PyMySQL
rewrite [import ～]part in various pattern...
description in Django setting.py below
# https://docs.djangoproject.com/en/2.1/ref/settings/#databases
# Install PyMySQL as mysqlclient/MySQLdb to use Django's mysqlclient adapter
# See https://docs.djangoproject.com/en/2.1/ref/databases/#mysql-db-api-drivers
# for more information
import MySQLdb as sql# noqa: 402
# [START db_setup]
if os.getenv('GAE_APPLICATION', None):
# Running on production App Engine, so connect to Google Cloud SQL using
# the unix socket at /cloudsql/<your-cloudsql-connection string>
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'HOST': '/cloudsql/michatbot-250809:us-central1:polls-instance2',
'USER': 'test',
'PASSWORD': '',
'NAME': 'polls',
}
}
else:
# Running locally so connect to either a local MySQL instance or connect to
# Cloud SQL via the proxy. To start the proxy via command line:
# $ cloud_sql_proxy -instances=[INSTANCE_CONNECTION_NAME]=tcp:3306
#
# See https://cloud.google.com/sql/docs/mysql-connect-proxy
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.mysql',
'HOST': '127.0.0.1',
'PORT': '3306',
'NAME': 'polls',
'USER': 'test',
'PASSWORD': '',
}
}
# [END db_setup]
eroor log on Google App Engine below
textPayload: "Traceback (most recent call last):
File "/env/lib/python3.7/site-packages/gunicorn/arbiter.py", line 583, in spawn_worker
worker.init_process()
File "/env/lib/python3.7/site-packages/gunicorn/workers/gthread.py", line 104, in init_process
super(ThreadWorker, self).init_process()
File "/env/lib/python3.7/site-packages/gunicorn/workers/base.py", line 129, in init_process
self.load_wsgi()
File "/env/lib/python3.7/site-packages/gunicorn/workers/base.py", line 138, in load_wsgi
self.wsgi = self.app.wsgi()
File "/env/lib/python3.7/site-packages/gunicorn/app/base.py", line 67, in wsgi
self.callable = self.load()
File "/env/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load
return self.load_wsgiapp()
File "/env/lib/python3.7/site-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
return util.import_app(self.app_uri)
File "/env/lib/python3.7/site-packages/gunicorn/util.py", line 350, in import_app
__import__(module)
File "/srv/main.py", line 1, in <module>
from mysite.wsgi import application
File "/srv/mysite/wsgi.py", line 16, in <module>
application = get_wsgi_application()
File "/env/lib/python3.7/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application
django.setup(set_prefix=False)
File "/env/lib/python3.7/site-packages/django/__init__.py", line 19, in setup
configure_logging(settings.LOGGING_CONFIG, settings.LOGGING)
File "/env/lib/python3.7/site-packages/django/conf/__init__.py", line 57, in __getattr__
self._setup(name)
File "/env/lib/python3.7/site-packages/django/conf/__init__.py", line 44, in _setup
self._wrapped = Settings(settings_module)
File "/env/lib/python3.7/site-packages/django/conf/__init__.py", line 107, in __init__
mod = importlib.import_module(self.SETTINGS_MODULE)
File "/opt/python3.7/lib/python3.7/importlib/__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "/srv/mysite/settings.py", line 82, in <module>
import MySQLdb as sql # noqa: 402
ModuleNotFoundError: No module named 'MySQLdb'"

Answer 1

There are two threads where the community figured out several ways to solve this error depending on your SO and software's versions. You can refer to these threads, second one, and also to this one that addresses discussion more about connecting MySQL in Python 3 on Windows.
Make sure to follow the documentation about Python 3.7 in the GAE Standard. Also, GAE has some specific support for using Django, I'd suggest going through the Django Support documentation and Django App example.