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In python, I am trying to replace a single backslash ("\") with a double backslash("\"). I have the following code:

directory = string.replace("C:\Users\Josh\Desktop\20130216", "\", "\\")

However, this gives an error message saying it doesn't like the double backslash. Can anyone help?


No need to use str.replace or string.replace here, just convert that string to a raw string:

>>> strs = r"C:\Users\Josh\Desktop\20130216"
           ^
           |
       notice the 'r'

Below is the repr version of the above string, that's why you're seeing \\ here. But, in fact the actual string contains just '\' not \\.

>>> strs
'C:\\Users\\Josh\\Desktop\\20130216'

>>> s = r"f\o"
>>> s            #repr representation
'f\\o'
>>> len(s)   #length is 3, as there's only one `'\'`
3

But when you're going to print this string you'll not get '\\' in the output.

>>> print strs
C:\Users\Josh\Desktop\20130216

If you want the string to show '\\' during print then use str.replace:

>>> new_strs = strs.replace('\\','\\\\')
>>> print new_strs
C:\\Users\\Josh\\Desktop\\20130216

repr version will now show \\\\:

>>> new_strs
'C:\\\\Users\\\\Josh\\\\Desktop\\\\20130216'

Replace Single Backslash with Double Backslash in python, I have a need to replace single backslashes with double backslashes. I know that the replace method of the string object can be used, however  Convering double backslash to single backslash in Python 3. I have a string like so: That I made using a function that converts unicode to the representative Python escape sequences. Then, when I want to convert it back, I can't get rid of the double backslash so that it is interpreted as unicode again.


Let me make it simple and clear. Lets use the re module in python to escape the special characters.

Python script :

import re
s = "C:\Users\Josh\Desktop"
print s
print re.escape(s)

Output :

C:\Users\Josh\Desktop
C:\\Users\\Josh\\Desktop

Explanation :

Now observe that re.escape function on escaping the special chars in the given string we able to add an other backslash before each backslash, and finally the output results in a double backslash, the desired output.

Hope this helps you.

string, The double backslashes you see are simply a way of displaying the single backslashes that are actually in the string. You can verify this by checking the length of  slashes - python replace single backslash with double backslash Given the source string, manipulation with os.path might make more sense, but here's a string solution; Note that split treats the \\ in the source string as a delimited empty string.


Use escape characters: "full\\path\\here", "\\" and "\\\\"

Avoiding Windows backslash problems with Python's raw strings , That is, you want a backslash, followed by an “n”? Then you'll need to double the backslash:The “\\” in a string will result in a single backslash  For replacing single backslash with single forward slash: var stringReplaced = String.raw`c:\asd\flkj\klsd\ffjkl`.split('\\').join('/') console.log(stringReplaced); For replacing double backslash with single forward slash :


In python \ (backslash) is used as an escape character. What this means that in places where you wish to insert a special character (such as newline), you would use the backslash and another character (\n for newline)

With your example string you would notice that when you put "C:\Users\Josh\Desktop\20130216" in the repl you will get "C:\\Users\\Josh\\Desktop\x8130216". This is because \2 has a special meaning in a python string. If you wish to specify \ then you need to put two \\ in your string.

"C:\\Users\\Josh\\Desktop\\28130216"

The other option is to notify python that your entire string must NOT use \ as an escape character by pre-pending the string with r

r"C:\Users\Josh\Desktop\20130216"

This is a "raw" string, and very useful in situations where you need to use lots of backslashes such as with regular expression strings.

In case you still wish to replace that single \ with \\ you would then use:

directory = string.replace(r"C:\Users\Josh\Desktop\20130216", "\\", "\\\\")

Notice that I am not using r' in the last two strings above. This is because, when you use the r' form of strings you cannot end that string with a single \

Why can't Python's raw string literals end with a single backslash?

https://pythonconquerstheuniverse.wordpress.com/2008/06/04/gotcha-%E2%80%94-backslashes-are-escape-characters/

Replacing double slash with single backslash - Coding, I recently encountered something for the first time in python, if I execute the following usrPath=os.environ['USERPROFILE'] in Maya script editor  It is in single backslash format. When you look at any string in the debugger, it shows them with appropriate escape characters: " ", "\t" and "\\" for newline, tab and a single backslash respectively. If you think about it, it makes sense: if it didn't you would not be able to tell any difference between "Hello There"


Maybe a syntax error in your case, you may change the line to:

directory = str(r"C:\Users\Josh\Desktop\20130216").replace('\\','\\\\')

which give you the right following output:

C:\\Users\\Josh\\Desktop\\20130216

Double backslash in filepaths ? - Python, It looks like sometimes a single backslash is replaced by a double think you can just substitute forward slashes and forget that double- en python, j'essaie de remplacer un simple antislash ( " \ ") par un double antislash ("\"). J'ai le code suivant: directory = string.replace("C:\Users\Josh\Desktop130216", "\", "\") cependant, cela donne un message d'erreur disant qu'il n'aime pas le double backslash. Quelqu'un peut-il aider?


Bug: Replace Selection changes double backslashes to single , Bug: Replace Selection changes double backslashes to single Spyder Version​: 3.2.6; Python Version: 3.6.4; Qt Version: 5.6.2; PyQt Version:  Double backslash in filepaths ?. Python Forums on Bytes. Need help? Post your question and get tips & solutions from a community of 452,289 IT Pros & Developers.


[Solved] How to replace Double Backslash in single backslash , "\" is a escape character in C#. C# usually uses "\\" to denote "\". So, it is not a problem. The issue here is the difference between what is contained in a string and what R displays to you. The string produced with the code: > tmp <- "C:\\" only has 3 characters (as David pointed out), the third of which is a single backslash, since the 1st \ escapes the 2nd and the R string parsing rules use the combination to put a sing backslash in the string.


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