CODEWITHSUNDEEP
pythonpython-3.x
user9912506
user9912506

Reputation:

Why "os.path.join" and "os.path.dirname(__file__)" return different separator?

I'm a beginner. My system is win10 Pro,and I use python3.X.

I use this code to test function "os.path.join()" and "os.path.dirname()".

import os
print(os.path.join(os.path.dirname(__file__), "dateConfig.ini"))

The output is:

E:/test_opencv\dateConfig.ini

I found os.path.join() use "/",but os.path.dirname() use "\",why?

If I want to use the same separator,all is '/' or '\',what should I do?

Upvotes: 2

Views: 975

Answers (1)

Jean-François Fabre
Jean-François Fabre

Reputation: 140148

that's because __file__ contains the script name as passed in argument.

If you run

python E:/test_opencv/myscript.py

then __file__ contains exactly the argument passed to python. (Windows has os.altsep as /, because it can use this alternate separator)

A good way of fixing that is to use os.path.normpath to replace the alternate separator by the official separator, remove double separators, ...

print(os.path.join(os.path.normpath(os.path.dirname(__file__)),"dateConfig.ini"))

Normalizing the path can be useful when running legacy Windows commands that don't support slashes/consider them as option switches. If you just use the path to pass to open, you don't need that.

Upvotes: 1

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