Python_报错:SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape

Python运行后,报错:SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape

原因:window 读取文件可以用,但是在字符串中是被当作转义字符来使用,经过转义之后可能就找不到路径的资源了,例如 会转义为tab键

上代码:

>>> def func1(path_name):
...     import os
...     if os.path.exists(path_name):
...         return "True"
...     else:
...         return "False"
...
>>> func1("C:Users
enyc")#会报错
  File "<stdin>", line 1
SyntaxError: (unicode error) 'unicodeescape' codec can't decode bytes in position 2-3: truncated UXXXXXXXX escape
>>>
本例中:"C:Users
enyc"经过转义之后就找不到路径的资源了。

解决方法:

>>> def func1(path_name):
...     import os
...     if os.path.exists(path_name):
...         return "True"
...     else:
...         return "False"
...
>>> func1(r"C:Users
enyc")#加上r,声明字符串,不用转义处理
'True'
>>> func1("C:\Users\renyc")#绝对路径的处理
'True'
>>>

总结有三种方法:

一:更换为绝对路径的写法
func1("C:\Users\renyc")

二:显式声明字符串不用转义(加r)
func1(r"C:Users enyc")

三:使用Linux的路径/
func1("C:/Users/renyc")



原文地址:https://www.cnblogs.com/rychh/p/9743864.html