Examples of four ways Python can traverse a directory

1.os.popen run the shell list command

def traverseDirByShell(path):

    for f in os.popen('ls ' + path):

        print f.strip()

2. Use the glob module

glob.glob (path) returns the file name with the directory. The wildcard is similar to shell.path cannot contain the shell variable.

def traverseDirByGlob(path):

    path = os.path.expanduser(path)

    for f in glob(path + '/*'):

        print f.strip()

3. Use os.listdir(recommended)

This method returns the file name or subdirectory name without the root directory

def traverseDirByListdir(path):

    path = os.path.expanduser(path)

    for f in os.listdir(path):

        print f.strip()

4. Use os.walk(recommended)

Returns a tuple containing three items: the current directory name, the subdirectory name, and the subfile name

def traverseDirByOSWalk(path):

    path = os.path.expanduser(path)

    for (dirname, subdir, subfile) in os.walk(path):

        #print('dirname is %s, subdir is %s, subfile is %s' % (dirname, subdir, subfile))

        print('[' + dirname + ']')

        for f in subfile:

            print(os.path.join(dirname, f))

Integrated code:

#!/usr/bin/python

import os

from glob import glob


def printSeparator(func):

    def deco(path):

        print("call method %s, result is:" % func.__name__)

        print("-" * 40)

        func(path)

        print("=" * 40)

    return deco
@printSeparator

def traverseDirByShell(path):

    for f in os.popen('ls ' + path):

        print f.strip()
@printSeparator

def traverseDirByGlob(path):

    path = os.path.expanduser(path)

    for f in glob(path + '/*'):

        print f.strip()
@printSeparator

def traverseDirByListdir(path):

    path = os.path.expanduser(path)

    for f in os.listdir(path):

        print f.strip()
@printSeparator

def traverseDirByOSWalk(path):

    path = os.path.expanduser(path)

    for (dirname, subdir, subfile) in os.walk(path):

        #print('dirname is %s, subdir is %s, subfile is %s' % (dirname, subdir, subfile))

        print('[' + dirname + ']')

        for f in subfile:

            print(os.path.join(dirname, f))
if __name__ == '__main__':

    path = r'~/src/py'

    traverseDirByGlob(path)
    traverseDirByGlob(path)
    traverseDirByListdir(path)
    traverseDirByOSWalk(path)