Linode上的Python Dash应用程序，找不到核心组件库

如何解决Linode上的Python Dash应用程序，找不到核心组件库

我之前在 Linode 上安装了 python Dash 应用程序。一切正常。这个应用程序，同样的设计，就是不合作。尽管在尝试检查 dash-core-components 的安装时显示“要求已满足”，但 Web 应用程序不会运行并显示此错误：

ImportError: No module named dash_core_components

以下是相关的错误片段。试图完全删除我的代码，重新安装它。甚至删除了 Linode 盒子并启动了一个全新的盒子，同样的错误结果。

root@localhost:~/27Club# gunicorn -w 3 index:server
[2021-06-18 20:33:51 +0000] [29070] [INFO] Starting gunicorn 19.9.0
[2021-06-18 20:33:51 +0000] [29070] [INFO] Listening at: http://127.0.0.1:8000 (29070)
[2021-06-18 20:33:51 +0000] [29070] [INFO] Using worker: sync
[2021-06-18 20:33:51 +0000] [29074] [INFO] Booting worker with pid: 29074
[2021-06-18 20:33:51 +0000] [29074] [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 "/root/27Club/index.py",line 1,in <module>
    import dash_core_components as dcc
ImportError: No module named dash_core_components
[2021-06-18 20:33:51 +0000] [29074] [INFO] Worker exiting (pid: 29074)
[2021-06-18 20:33:52 +0000] [29070] [INFO] Shutting down: Master
[2021-06-18 20:33:52 +0000] [29070] [INFO] Reason: Worker Failed to boot.