1+ # We have seen that lists are mutable (they can be changed), and tuples are immutable (they cannot be changed).
2+ 3+ # Let's try to understand this with an example.
4+ 5+ # You are given an immutable string, and you want to make changes to it.
6+ 7+ # Example
8+ 9+ # >>> string = "abracadabra"
10+ # You can access an index by:
11+ 12+ # >>> print string[5]
13+ # a
14+ # What if you would like to assign a value?
15+ 16+ # >>> string[5] = 'k'
17+ # Traceback (most recent call last):
18+ # File "<stdin>", line 1, in <module>
19+ # TypeError: 'str' object does not support item assignment
20+ # How would you approach this?
21+ 22+ # One solution is to convert the string to a list and then change the value.
23+ # Example
24+ 25+ # >>> string = "abracadabra"
26+ # >>> l = list(string)
27+ # >>> l[5] = 'k'
28+ # >>> string = ''.join(l)
29+ # >>> print string
30+ # abrackdabra
31+ # Another approach is to slice the string and join it back.
32+ # Example
33+ 34+ # >>> string = string[:5] + "k" + string[6:]
35+ # >>> print string
36+ # abrackdabra
37+ # Task
38+ # Read a given string, change the character at a given index and then print the modified string.
39+ 40+ # Input Format
41+ # The first line contains a string, .
42+ # The next line contains an integer , denoting the index location and a character separated by a space.
43+ 44+ # Output Format
45+ # Using any of the methods explained above, replace the character at index with character .
46+ 47+ # Sample Input
48+ 49+ # abracadabra
50+ # 5 k
51+ # Sample Output
52+ 53+ # abrackdabra
54+ 55+ 56+ 57+ 58+ def mutate_string (string , position , character ):
59+ l = list (string )
60+ l [position ] = character
61+ string = "" .join (l )
62+ return (string )
63+ 64+ if __name__ == '__main__' :
65+ s = input ()
66+ i , c = input ().split ()
67+ s_new = mutate_string (s , int (i ), c )
68+ print (s_new )
0 commit comments