Python尝试/除外麻烦-NotADirectoryError：[Errno 20]不是目录

Question

在这种情况下，我试图适当地捕获特定的异常“ NotADirectory”，但似乎无法到达我的打印语句，Python仍然会抛出该异常。

try:
    required_dirs = ('collectors', 'config')
    if all(required_dir in os.listdir(self.bundle) for required_dir in required_dirs):
      print('all dirs present')
except NotADirectoryError:
    print('not a directory')

堆栈跟踪：

127.0.0.1 - - [26/Nov/2019 10:42:28] "POST /picker HTTP/1.1" 500 -
Traceback (most recent call last):
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 2309, in __call__
    return self.wsgi_app(environ, start_response)
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 2295, in wsgi_app
    response = self.handle_exception(e)
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 1741, in handle_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/Users/<user>/anaconda3/lib/python3.7/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/Users/<user>/Documents/projects/main/routes.py", line 86, in bundle_picker
    test_obj = Cluster(request.form['name'].strip(), name)
  File "/Users/<user>/Documents/projects/main/cluster.py", line 30, in __init__
    self.create_objs()
  File "/Users/<user>/Documents/projects/main/cluster.py", line 84, in create_objs
    if all(required_dir in os.listdir(self.bundle) for required_dir in required_dirs):
  File "/Users/<user>/Documents/projects/main/cluster.py", line 84, in <genexpr>
    if all(required_dir in os.listdir(self.bundle) for required_dir in required_dirs):
NotADirectoryError: [Errno 20] Not a directory: '/path/song.mp4'