Flask PermissionError: [Errno 13] 权限被拒绝

Question

我正在尝试使用运行 Flask 应用程序/opt/mount1/python35/bin/python3.5 notification.py，但收到以下错误：

WARNING:tensorflow:From /opt/mount1/python35/lib/python3.5/site-packages/tensorflow/python/framework/op_def_library.py:263: colocate_with (from tensorflow.python.framework.ops) is deprecated and will be removed in a future version.
Instructions for updating:
Colocations handled automatically by placer.
 * Serving Flask app "notification" (lazy loading)
 * Environment: production
   WARNING: Do not use the development server in a production environment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
 * Restarting with stat
Traceback (most recent call last):
  File "notification.py", line 19, in <module>
    app.run(debug=True)
  File "/opt/mount1/python35/lib/python3.5/site-packages/flask/app.py", line 943, in run
    run_simple(host, port, self, **options)
  File "/opt/mount1/python35/lib/python3.5/site-packages/werkzeug/serving.py", line 988, in run_simple
    run_with_reloader(inner, extra_files, reloader_interval, reloader_type)
  File "/opt/mount1/python35/lib/python3.5/site-packages/werkzeug/_reloader.py", line 332, in run_with_reloader
    sys.exit(reloader.restart_with_reloader())
  File "/opt/mount1/python35/lib/python3.5/site-packages/werkzeug/_reloader.py", line 176, in restart_with_reloader
    exit_code = subprocess.call(args, env=new_environ, close_fds=False)
  File "/opt/mount1/python35/lib/python3.5/subprocess.py", line 247, in call
    with Popen(*popenargs, **kwargs) as p:
  File "/opt/mount1/python35/lib/python3.5/subprocess.py", line 676, in __init__
    restore_signals, start_new_session)
  File "/opt/mount1/python35/lib/python3.5/subprocess.py", line 1289, in _execute_child
    raise child_exception_type(errno_num, err_msg)
PermissionError: [Errno 13] Permission denied

我已向 Flask 应用程序文件夹授予递归 777 权限。

从上面的堆栈跟踪来看，我不确定出了什么问题。

任何帮助将不胜感激。谢谢！

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更新

我尝试使用CentOS 7.6 的核心 python（即 Python 2.7）运行 Flask 应用程序，它成功了！

我不确定为什么它不适用于已从其 RPM 安装到 path 的python 版本 3.5.6/opt/mount1/python35。

Answer 1

错误 13（您的权限错误）通常可以通过更改端口号来解决。低于 1024 的 TCP/IP 端口号是注册端口号或“特权”端口号 - 不允许用户在其上运行服务器。根据显示的第一条警告消息（关于生产环境中的服务器），我的猜测是您正在低端口号（可能是 80）上运行应用程序，但是如果您在不同的端口号（例如 4000 或其他端口号）上运行它（超过1024），您将避免此错误。

您可能会发现此链接很有帮助

摘抄：

import socket

HOST = '127.0.0.1'  # Standard loopback interface address (localhost)
PORT = 65432        # Port to listen on (non-privileged ports are > 1023)