烧瓶的部署问题＆amp; gunicorn [未发现的模块]

Question

我已经开发了一个烧瓶应用程序，现在我正在尝试将其部署在Linux服务器上。我关注了 linode文档< /a>从a到z，但是我最终在设置superionor时堆叠。

基本上，每当我输入安装所有软件包的虚拟环境（Python 3.7）时，我都可以通过运行来打开服务器：

source venv/bin/activate
gunicorn -w 3 flask_app:app

但是，当我设置我在虚拟环境中安装的主管时，请使用PIP（如文档中解释） ，我会遇到错误的

[2022-06-06 02:44:54 +0000] [9205] [INFO] Using worker: sync
[2022-06-06 02:44:54 +0000] [9209] [INFO] Booting worker with pid: 9209
[2022-06-06 02:44:54 +0000] [9209] [ERROR] Exception in worker process
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gunicorn/arbiter.py", line 583, in spawn_worker
    worker.init_process()
  File "/usr/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 129, in init_process
    self.load_wsgi()
  File "/usr/lib/python2.7/dist-packages/gunicorn/workers/base.py", line 138, in load_wsgi
    self.wsgi = self.app.wsgi()
  File "/usr/lib/python2.7/dist-packages/gunicorn/app/base.py", line 67, in wsgi
    self.callable = self.load()
  File "/usr/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 52, in load
    return self.load_wsgiapp()
  File "/usr/lib/python2.7/dist-packages/gunicorn/app/wsgiapp.py", line 41, in load_wsgiapp
    return util.import_app(self.app_uri)
  File "/usr/lib/python2.7/dist-packages/gunicorn/util.py", line 375, in import_app
    __import__(module)
  File "/var/www/app/__init__.py", line 3, in <module>
    from app.db import db_session
  File "/var/www/app/db.py", line 1, in <module>
    from flask import current_app, g
ImportError: No module named flask

想法吗？向我出来的第一件事是，环境在Python 3.7中，但是主管似乎正在研究Python 2.7，我该如何解决这个问题？