url https://thispointer.com/python-how-to-replace-single-or-multiple-characters-in-a-string/

Replace multiple characters/strings in a string

str.replace() function can replace the occurrences of one given sub string only. But what if we want to replace multiple sub strings in a given string ?

Suppose we have a string i.e.

1

mainStr = “Hello, This is a sample string”

Now, how to replace all the occurrences of these three characters ‘s’, ‘l’, ‘a’ with this string ‘AA’ ?
Let’s create a new function over replace() to do that i.e.

1
2
3
4
5
6
7
8
9
10
11
12

”’
Replace a set of multiple sub strings with a new string in main string.
”’
def replaceMultiple(mainString, toBeReplaces, newString):
    # Iterate over the strings to be replaced
    for elem in toBeReplaces :
        # Check if string is in the main string
        if elem in mainString :
            # Replace the string
            mainString = mainString.replace(elem, newString)
    
    return  mainString

It will replace all the occurrences of strings in List toBeReplaces with newString in the main given list mainString.
Let’s see how to replace the occurrences of [‘s’, ‘l’, ‘a’] with “AA” i.e.

1
2
3
4
5

”’
Replace multiple characters / strings from a string
”’
# Replace all the occurrences of string in list by AA in the main list 
otherStr = replaceMultiple(mainStr, [‘s’, ‘l’, ‘a’] , “AA”)

openpolitics.com

Python : How to replace single or multiple characters in a string ?

Replace multiple characters/strings in a string