os.path.join()函数：连接两个或更多的路径名组件:

• 如果各组件名首字母不包含’/',则函数会自动加上。
• 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。
• 如果最后一个组件为空，则生成的路径以一个’/'分隔符结尾。

例1:

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)

'''
#output
Path10 = homedevelopcode
Path20 = home\develop\code
'''

例2：

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)


'''
#output
Path10 = /homedevelopcode
Path20 = /home\develop\code
'''

例3:

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)


'''
#output
Path10 = home/developcode
Path20 = /develop\code
'''

例4:

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)


'''
#output
Path10 = homedevelop/code
Path20 = /code
'''

Reference

Python路径拼接os.path.join()函数的用法

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