file - Error with double backslash in Windows path in Python

Question

I want to work with paths in Windows in Python 3.3, but I have an error:

FileNotFoundError: [Errno 2] No such file or directory: 'E:\dir\.project'

The problem is the double backslash. I read the solution using r.

def f(dir_from):
    list_of_directory = os.listdir(dir_from)
    for element in list_of_directory:
        if os.path.isfile(os.path.join(dir_from, element)):
            open(os.path.join(dir_from, element))

f(r'E:\dir')

I have this error again

FileNotFoundError: [Errno 2] No such file or directory: 'E:\dir\.project'

os.path.normpath(path) doesn't solve my problem.

What am I doing wrong?

Answer 1

If you are using a raw-string, then you do not escape backslashes:

f(r'E:dir')

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Of course, this problem (and many others like it) can be solved by simply using forwardslashes in paths:

f('E:/dir')