I need to remove a file in python at Windows2012R2, but, os.remove()auto add \ in each seq.

code:
#coding=utf-8
import os
dir_path='d:\c\d\e\t\c\t.xf'
os.remove(dir_path)


result:
Python 2.7.13 (v2.7.13:a06454b1afa1, Dec 17 2016, 20:53:40) [MSC v.1500 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> ================================ RESTART ================================
>>> 

Traceback (most recent call last):
  File "D:\test\script\test.py", line 4, in <module>
    os.remove(dir_path)
WindowsError: [Error 3] The system cannot find the path specified: 'd:\\c\\d\\e\t\\c\t.xf'
>>>

There are two problems with your code and bug report:

1. By using a single quoted string, some of the backslashes in the path are being interpreted as starting a special character (specifically \t is interpreted as a tab character). You should either double the backslashes to prevent this interpretation (dir_path='d:\\c\\d\\e\\t\\c\\t.xf'), use forward slashes (dir_path='d:/c/d/e/t/c/t.xf') or use a raw string (dir_path=r'd:\c\d\e\t\c\t.xf').

2. You're reporting that Python "auto adds \". It doesn't, it's just that the repr of the string shows a single quoted string with backslashes doubled - that's the standard repr for strings.

So, Python is behaving as expected, and there's no bug here.