Best way to replace multiple characters in a string?

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I need to replace some characters as follows: &\&, #\#, ...

I coded as follows, but I guess there should be some better way. Any hints?

strs = strs.replace('&', '\&')
strs = strs.replace('#', '\#')
...

Python, Python | Replace multiple characters at once This problem can be solved using the nested replace method, which internally would create a temp. variable to print ( "The string after replacement of positions : " + res) We use cookies to ensure you have the best browsing experience on our website. Python, strings 1 Comment. In this article we will discuss how to replace single or multiple characters in a string in Python. Python provides a str.replace () function i.e. str.replace(old, new , count) str.replace (old, new , count) str.replace (old, new , count) It returns a new string object that is a copy of existing string with replaced content.

>>> string="abc&def#ghi"
>>> for ch in ['&','#']:
...   if ch in string:
...      string=string.replace(ch,"\\"+ch)
...
>>> print string
abc\&def\#ghi

How to replace multiple characters in a string in Python, Use str. replace() to replace characters in a string Use a for-loop to iterate over a list of characters to replace. In each iteration, call str. replace(old, new) to replace old with new in str . string str="x/o/f"; We need to replace x with Xray, o with option, and f with folder. Here is a single line of code: str = str.Replace ("x", "Xray").Replace ("o", "option").Replace ("f", "folder"); The output will be this: str="Xray/option/folder"; This may not be the effective way but you can write clean code.

Simply chain the replace functions like this

strs = "abc&def#ghi"
print strs.replace('&', '\&').replace('#', '\#')
# abc\&def\#ghi

If the replacements are going to be more in number, you can do this in this generic way

strs, replacements = "abc&def#ghi", {"&": "\&", "#": "\#"}
print "".join([replacements.get(c, c) for c in strs])
# abc\&def\#ghi

Python : How to replace single or multiple characters in a string , str.replace(old, new , count) It returns a new string object that is a copy of existing string with replaced content. Also,. If count is not provides� Replacement character: ~. Output String: ~N_100~~6858~~~6858~~N_100~0_2~~N_35. I had tried below query with Nested REPLACE Functions and I got desired output: DECLARE @NEWSTRING VARCHAR(100) SET @NEWSTRING = ' (N_100- (6858)* (6858)*N_100/0_2)%N_35' ; SELECT @NEWSTRING = REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE( @NEWSTRING, '+', '~'), '-', '~'), '*', '~'), '/', '~') , '%', '~'), ' (', '~'), ')', '~') PRINT @NEWSTRING.

Here is a python3 method using str.translate and str.maketrans:

s = "abc&def#ghi"
print(s.translate(str.maketrans({'&': '\&', '#': '\#'})))

The printed string is abc\&def\#ghi.

Replace strings in Python (replace, translate, re.sub, re.subn), When replacing multiple characters (a string of length 1 ), you can use the translate() method described below. Replace newline character. If� replace multiple characters in a string with different characters. Hello! I am trying to replace multiple characters in a string using only one line of command. I am aware I can use regexprep to replace multiple characters with a single character like: replaced = regexprep (line,' [ru]','!');

Are you always going to prepend a backslash? If so, try

import re
rx = re.compile('([&#])')
#                  ^^ fill in the characters here.
strs = rx.sub('\\\\\\1', strs)

It may not be the most efficient method but I think it is the easiest.

replace multiple characters in a string with different characters , I do not want to use strrep for each replacement. How can I go about it? Thanks! 2 Comments. Java String replace () method replaces every occurrence of a given character with a new character and returns a new string. This method allows the replacement of a sequence of character values.

How to replace multiple strings in a given string in C#, Here is a quick tip on how to replace multiple strings in a give string or line or you need to be sure to look for the right sub string or characters. I m looking for the fastest way to replace multiple (~500) substrings of a big (~1mb) string. Whatever I have tried it seems that String.Replace is the fastest way of doing it. I just care about the fastest possible way. Not code readability, maintainability etc. I dont care if I need to use unsafe code or pre-process the original string either.

string replace multiple characters Code Example, Get code examples like "string replace multiple characters" instantly right .split( search).join(replacement) for multiple characters javascript� data frame with the column you would like to replace string patterns. Var: character string naming the column you would like to replace string patterns. The column must be of class character or factor. replaceData: a data frame with at least two columns. One contains the patterns to replace and the other contains their replacement.

Python program to replace single or multiple character,substring in a , In this tutorial, we will learn how to replace single or multiple characters in a string in python. For example, if you want to replace all 'l' with '#' in� The String.Replace () method replaces a character or a string with another character or string in a string. In C#, Strings are immutable. That means the method does not replace characters or strings from a string. The method creates and returns a new string with new characters or strings.

Comments
  • See stackoverflow.com/questions/3367809/… and stackoverflow.com/questions/3411006/…
  • Why isn't this the excepted answer?
  • Is if c in text: necessary in ba?
  • @haccks It's not necessary, but it's 2-3x quicker with it. Short string, with: 1.45 usec per loop, and without: 5.3 usec per loop, Long string, with: 4.38 usec per loop and without: 7.03 usec per loop. (Note these aren't directly comparable with the results above, because it's a different machine etc.)
  • @Hugo; I think this difference in time is because of replace is called only when c is found in text in case of ba while it is called in every iteration in ab.
  • @haccks Thanks, I've updated my answer with further timings: adding the check is better for both, but the biggest lesson is Python 3 is up to 3x faster!
  • Why was a double backslash needed? Why doesn't just "\" work?
  • The double backslash escapes the backslash, otherwise python would interpret "\" as a literal quotation character within a still-open string.
  • Why do you need to string=string.replace(ch,"\\"+ch)? Isn't just string.replace(ch,"\\"+ch) enough?
  • @MattSom replace() doesn't modify the original string, but returns a copy. So you need the assignment for the code to have any effect.