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\t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\renyc")#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\renyc"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\renyc")#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\renyc")
三:使用Linux的路径/
func1("C:/Users/renyc")