Replace within the fragment. Given a string, replace every occurrence of the letter “h” with the letter “H”, except for the first and the last occurrences.
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s = input() first_index = s.find('h') last_index = s.rfind('h') middle = s[first_index + 1:last_index].replace('h', 'H') print(s[:first_index + 1] + middle + s[last_index:]) |
Explanation of the Code
- Reading Input:
- The
input() function reads a line of text from the user and stores it in the variable s.
- Finding the First and Last Index of ‘h’:
first_index = s.find('h')
last_index = s.rfind('h')
- The
find('h') method returns the index of the first occurrence of ‘h’.
- The
rfind('h') method returns the index of the last occurrence of ‘h’.
- Replacing ‘h’ with ‘H’ in the Middle Part:
middle = s[first_index + 1:last_index].replace('h', 'H')
s[first_index + 1:last_index] extracts the substring between the first and last occurrences of ‘h’.- The
replace('h', 'H') method replaces all occurrences of ‘h’ with ‘H’ in this substring.
- Constructing the Resulting String:
print(s[:first_index + 1] + middle + s[last_index:])
s[:first_index + 1] gives the substring from the start up to and including the first ‘h’.middle is the modified substring with ‘h’ replaced by ‘H’.s[last_index:] gives the substring from the last ‘h’ to the end.- Concatenating these parts constructs the final string.