原文链接

os.path.join()

正文

os.path.join() 函数：连接两个或更多的路径名组件

1. 如果各组件名首字母不包含 /，则函数会自动加上
2. 如果有一个组件是一个 绝对路径 ，则在它之前的所有组件均会被舍弃
3. 如果最后一个组件为 空 ，则生成的路径以一个 / 分隔符结尾

Demo1

import os

Path1 = 'home'  
Path2 = 'develop'  
Path3 = 'code'

Path10 = Path1 + Path2 + Path3  
Path20 = os.path.join(Path1, Path2, Path3)  
print ('Path10 = ', Path10)  
print ('Path20 = ', Path20)

输出

Path10 = homedevelopcode
Path20 = home\develop\code

Demo2

import os

Path1 = '/home'  
Path2 = 'develop'  
Path3 = 'code'

Path10 = Path1 + Path2 + Path3  
Path20 = os.path.join(Path1,Path2,Path3)  
print ('Path10 = ', Path10)  
print ('Path20 = ', Path20)   

输出

Path10 = /homedevelopcode
Path20 = /home\develop\code

Demo3

import os

Path1 = 'home'  
Path2 = '/develop'  
Path3 = 'code'

Path10 = Path1 + Path2 + Path3  
Path20 = os.path.join(Path1,Path2,Path3)  
print ('Path10 = ', Path10)  
print ('Path20 = ', Path20) 

输出

Path10 = home/developcode
Path20 = /develop\code

Demo4

import os

Path1 = 'home'  
Path2 = 'develop'  
Path3 = '/code'

Path10 = Path1 + Path2 + Path3  
Path20 = os.path.join(Path1,Path2,Path3)  
print ('Path10 = ', Path10)  
print ('Path20 = ', Path20 )

输出

Path10 = homedevelop/code
Path20 = /code

注意

当有多个 / 时，也从最后一个路径开始往后拼接