Create test directory

import os

def getListOfFiles(dirName):
    # create a list of file and sub directories
    # names in the given directory
    listOfFile = os.listdir(dirName)
    allFiles = list()
    # Iterate over all the entries
    for entry in listOfFile:
        # Create full path
        fullPath = os.path.join(dirName, entry)
        # If entry is a directory then get the list of files in this directory
        if os.path.isdir(fullPath):
            allFiles = allFiles + getListOfFiles(fullPath)
        else:
            allFiles.append(fullPath)

    return allFiles

with open("filename.txt", "r") as f:
    files = [line.strip() for line in f.readlines()]
    for item in files:
        os.system("mkdir ntttest\\" + item)
        for i in range(1, 11):
            if (i != 10):
                test_folder = "Test0" + str(i)
            else:
                test_folder = "Test10"
            os.system("mkdir ntttest\\" + item + "\\" + test_folder)
            os.system("copy nul .\\ntttest\\" + item + "\\" + test_folder + "\\" + item + ".INP")
            os.system("copy nul .\\ntttest\\" + item + "\\" + test_folder + "\\" + item + ".OUT")