python如何实现复制目录到指定目录

import os
import time

copyFileCounts = 0


def copyFiles(sourceDir, targetDir):
    global copyFileCounts
    print(sourceDir)
    print(u"%s 当前处理文件夹%s已处理%s 个文件" % (
    time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), sourceDir, copyFileCounts))
    for f in os.listdir(sourceDir):
        sourceF = os.path.join(sourceDir, f)
        targetF = os.path.join(targetDir, f)
        if os.path.isfile(sourceF):
            # 创建目录
            if not os.path.exists(targetDir):
                os.makedirs(targetDir)
            copyFileCounts += 1
            # 文件不存在，或者存在但是大小不同，覆盖
            if not os.path.exists(targetF) or (
                    os.path.exists(targetF) and (os.path.getsize(targetF) != os.path.getsize(sourceF))):
                # 2进制文件
                open(targetF, "wb").write(open(sourceF, "rb").read())
                print(u"%s %s 复制完毕" % (time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), targetF))
            else:
                print(u"%s %s 已存在，不重复复制" % (time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())), targetF))
        if os.path.isdir(sourceF):
            copyFiles(sourceF, targetF)


if __name__ == "__main__":
    copyFiles('/content/chest_xray/', '/content/drive/My Drive/chest_xray/')