Python에서 텍스트 파일 내용을 읽기 위해 폴더 구조를 재귀적으로 탐색하는 방법은 무엇입니까?

<code class="python">import os
import sys

rootdir = sys.argv[1]

for root, subFolders, files in os.walk(rootdir):

    for folder in subFolders:
        outfileName = rootdir + "/" + folder + "/py-outfile.txt" # hardcoded path
        folderOut = open( outfileName, 'w' )
        print "outfileName is " + outfileName

        for file in files:
            filePath = rootdir + '/' + file
            f = open( filePath, 'r' )
            toWrite = f.read()
            print "Writing '" + toWrite + "' to" + filePath
            folderOut.write( toWrite )
            f.close()

        folderOut.close()</code>

<code class="python">filePath = rootdir + '/' + file</code>

<code class="python">filePath = os.path.join(root, file)</code>

<code class="python">import os
import sys

walk_dir = sys.argv[1]

print('walk_dir = ' + walk_dir)

# Converting to absolute path ensures portability
walk_dir = os.path.abspath(walk_dir)
print('walk_dir (absolute) = ' + walk_dir)

for root, subdirs, files in os.walk(walk_dir):
    print('--\nroot = ' + root)
    list_file_path = os.path.join(root, 'my-directory-list.txt')
    print('list_file_path = ' + list_file_path)

    with open(list_file_path, 'wb') as list_file:
        for subdir in subdirs:
            print('\t- subdirectory ' + subdir)

        for filename in files:
            file_path = os.path.join(root, filename)

            print('\t- file %s (full path: %s)' % (filename, file_path))

            with open(file_path, 'rb') as f:
                f_content = f.read()
                list_file.write(('The file %s contains:\n' % filename).encode('utf-8'))
                list_file.write(f_content)
                list_file.write(b'\n')</code>