replace a char in string with another in python

To replace a character in a string with another character in Python, you can use the replace() method. Here is an example:

main.py
string = "Hello, World!"
new_string = string.replace("o", "x")
print(new_string)
81 chars
4 lines

Output:

main.py
Hellx, Wxrld!
14 chars
2 lines

In the above example, we are replacing all occurrences of the character 'o' with the character 'x' in the string. The replace() method returns a new string with the replacements made.

Note that the replace() method is case-sensitive. If you want to perform a case-insensitive replacement, you can use the re module or convert the string to lowercase or uppercase before performing the replacement.

main.py
import re

string = "Hello, World!"
new_string = re.sub("o", "x", string, flags=re.IGNORECASE)
print(new_string)
113 chars
6 lines

Output:

main.py
Hellx, Wxrld!
14 chars
2 lines

Alternatively, you can use the translate() method along with the maketrans() function to perform character replacements. Here is an example:

main.py
string = "Hello, World!"
translation_table = str.maketrans("o", "x")
new_string = string.translate(translation_table)
print(new_string)
136 chars
5 lines

Output:

main.py
Hellx, Wxrld!
14 chars
2 lines

In this case, the maketrans() function creates a translation table where each occurrence of the character 'o' is mapped to the character 'x'. The translate() method then applies the translation table to the string to perform the replacements.