In Python, Unicode strings are the go-to solution for handling non-ASCII characters. Unicode provides a unique number for every character, no matter the platform, program, or language, which is ...

Implement the function to modify and return the string ‘ str’ in such a way that all occurrences of ‘ch1’ in original string are replaced by ‘ch2’ and all occurrences of ‘ch2’ in original string are ...

# To some string S, we will perform some replacement operations that # replace groups of letters with new ones (not necessarily the same size). # Each replacement operation has 3 parameters: a ...