Pycharm在Python-Django项目的调试模式下给出错误“ TypeError：'NoneType'对象不可调用”

Question

我已经在Pycharm中建立了python-django项目。

在运行模式下的python manage.py runserver命令上，它可以正常工作，但是当我在调试模式下运行项目时，出现以下异常：

Traceback (most recent call last):
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 2060, in <module>
    main()
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 2054, in main
    globals = debugger.run(setup['file'], None, None, is_module)
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 1405, in run
    return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 1412, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/home/usmanmaqbool/Desktop/proj/manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/base.py", line 294, in run_from_argv
    self.execute(*args, **cmd_options)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 58, in execute
    super(Command, self).execute(*args, **options)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/base.py", line 345, in execute
    output = self.handle(*args, **options)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 97, in handle
    self.run(**options)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 106, in run
    autoreload.main(self.inner_run, None, options)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 333, in main
    reloader(wrapped_main_func, args, kwargs)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 304, in python_reloader
    exit_code = restart_with_reloader()
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 290, in restart_with_reloader
    exit_code = os.spawnve(os.P_WAIT, sys.executable, args, new_environ)
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/_pydev_bundle/pydev_monkey.py", line 496, in new_spawnve
    return getattr(os, original_name)(mode, path, args, env)
  File "/home/usmanmaqbool/Envs/proj/lib/python2.7/os.py", line 573, in spawnve
    return _spawnvef(mode, file, args, env, execve)
  File "/home/usmanmaqbool/Envs/proj/lib/python2.7/os.py", line 549, in _spawnvef
    elif WIFSIGNALED(sts):
  File "/home/usmanmaqbool/Envs/proj/lib/python2.7/os.py", line 549, in _spawnvef
    elif WIFSIGNALED(sts):
TypeError: 'NoneType' object is not callable

Process finished with exit code 1

我还创建了新的Virtua ENV，并且也创建了新的虚拟ENV！

编辑1

数据库设置：

DATABASES = {
'default': {
    'ENGINE': 'django.db.backends.postgresql_psycopg2',
    'NAME': 'db_name',
    'USER': 'user',
    'PASSWORD': 'passworf',
    'HOST': 'localhost',
    'PORT': '',
    }
}

几天前它运行良好，但是在新版Pycharm更新之后，我仅在一个项目上遇到了这个问题。

Answer 1

这是PyCharm 2019.2调试器中某些Python版本的回归，例如旧的2.7.x https://youtrack.jetbrains.com/issue/PY-36726

此修复程序已准备就绪，并将包含在2019.2.1较小更新中，预览版本将在本周上线。

Answer 2

版本2019.2.1现已发布并修复此错误。

如下更新您的PyCharm版本：

转到File -> Settings -> Appearance & Behaviour -> System Settings -> Updates

按Check Now，然后按Update