I am creating a new nested directory (data_dir = 'parentchild'
) in python:
try: os.mkdir(data_dir) except WindowsError: pass
If the parent directory 'parent'
did not exists (yet, ’cause I might be setting later in the code), then the code caught that as a Windows Error 3
and moved on.
However now what could also happen is Windows Error 206
which is when the filename or extension is too long. For which I would need to take a separate action.
Is there a way to distinguish between Windows Error
3
and 206
(and others) so as to raise distinct Exceptions
?
Advertisement
Answer
You could use WindowsError.winerror (inherited from OSError: [Python.Docs]: Built-in Exceptions – winerror) to differentiate between underlying errors. Something like:
>>> def create_dir(path): ... try: ... os.mkdir(path) ... except WindowsError as e: ... if e.winerror == 3: ... print("Handling WindowsError 3") ... elif e.winerror == 206: ... print("Handling WindowsError 206") ... else: ... print("Handling other WindowsError") ... except: ... print("Handling other exceptions") ... >>> >>> create_dir("not/existing") Handling WindowsError 3 >>> create_dir("a" * 228) Handling WindowsError 206 >>> create_dir(":") Handling other WindowsError
Of course, WindowsError 3 can easily be avoided, using [Python.Docs]: os.makedirs(name, mode=0o777, exist_ok=False).