What is different between makedirs and mkdir of os

问题:

I am confused to use about these two osmethods to create the new directory.

Please give me some example in Python.

回答1:

makedirs() creates all the intermediate directories if they don't exist (just like mkdir -p in bash).

mkdir() can create a single sub-directory, and will throw an exception if intermediate directories that don't exist are specified.

Either can be used to create a single 'leaf' directory (dirA):

• os.mkdir('dirA')
• os.makedirs('dirA')

But makedirs must be used to create 'branches':

• os.makedirs('dirA/dirB') will work [the entire structure is created]

mkdir can work here if dirA already exists, but if it doesn't an error will be thrown.

Note that unlike mkdir -p in bash, either will fail if the leaf already exists.

回答2:

(Can not comment, just add to NPE's answer.)

In Python3, os.makedirs has a default parameter exist_ok=False.
If you set it to True, then os.makedirs will not throw any exception if the leaf exists.
(While os.mkdir doesn't have this parameter.)

Just like this:

os.makedirs('dirA', exist_ok=True)

P.S.
You can type ? before the name of a method in IPython shell to take a quick look at the documentation.
e.g.:

>>> import os
>>> ? os.makedirs