python利用os模块编写文件复制功能———copy（）函数

#文件复制
import os
src_path=r'E:\Pycharm\python100题\代码'
target_path=r'E:\Pycharm\python100题\123'

#封装成函数
def copy_function(src,target):
    if os.path.isdir(src) and os.path.isdir(target):
        filelist=os.listdir(src)
        for file in filelist:
             path=os.path.join(src,file)
             if os.path.isdir(path):
                 copy_function(path,target)
             with open(path,'rb') as rstream:
                 container=rstream.read()
                 path1=os.path.join(target,file)
                 with open(path1,'wb') as wstream:
                     wstream.write(container)
        else:
            print('复制完毕!')
copy_function(src_path,target_path)

#改进后的文件复制，可以递归复制文件，之前的文件复制不能复制文件夹
import os
src_path=r'E:\Pycharm\python100题\代码'
target_path=r'E:\Pycharm\python100题\123'

def copy_function(src,target):
    if os.path.isdir(src) and os.path.isdir(target):
        filelist=os.listdir(src)
        for file in filelist:
             path=os.path.join(src,file)
             if os.path.isdir(path):         #判断是否为文件夹
                 target1=os.path.join(target,file)
                 os.mkdir(target1)    #在目标文件下在创建一个文件夹

                 copy_function(path,target1)
             else:
                 with open(path, 'rb') as rstream:
                     container = rstream.read()
                     path1 = os.path.join(target, file)
                     with open(path1, 'wb') as wstream:
                         wstream.write(container)
        else:
            print('复制完毕!')
copy_function(src_path, target_path)