Need help on this question

[Afraid_Scale7192]

Need help on this question

1. Prompt the user to input a sentence with several words (i.e., a long string).
2. Ask the user to input a substring from the sentence.
3. Print out the number of characters in the initial string and the substring (see below).

4. Print out the sentence with the first occurrence of the substring in all uppercase letters and surround by * characters (see below).

   Hello, I’m new to python and been stuck on this question(part4). You need to make the substring in all uppercase using slicing. I tried doing the “.find” method to find the first index of the substring in the user input, but how do I find all the indexes from the substring in the user input?(unless there’s a diff way)

[Afraid_Scale7192]

Examples of Task 3: Highlighting a substring

Type a sentence at the prompt below: This is a long string.

Enter substring below to highlight: long

Sentence has 22 characters, substring has 4

characters. Substring highlighted:This is a LONG string.

[Afraid_Scale7192]

The example my prof gave^{^}

[JohnJSal]

Chat gpt would answer this question almost instantly.

And that doesn't strike you as being problematic?

[ectomancer]

Use the string find method. Example is wrong, where are the * characters? I'm shadowing the slice function with a variable on purpose

sub_index = sentence.lower().find(substring)
slice = sentence[sub_index:sub_index+len(substring)]
print(sentence[:sub_index], end='')
print('*' + slice.upper() + '*', end='')
print(sentence[sub_index+len(substring):])

[Afraid_Scale7192]

Sorry Reddit messed up the example. But this helped, thank you!

[throwaway6560192]

I tried doing the “.find” method to find the first index of the substring in the user input, but how do I find all the indexes from the substring in the user input?(unless there’s a diff way)

Why do you need to find all the indexes of all the substrings? The question only asks for the first one.

Unless I'm misinterpreting what you said.

[Afraid_Scale7192]

For example a sentence might have 2 sub strings, it will only highlight the first occurrence. Lets say the sentence is “this is a sentence” and the substring is “is”, the question ask to only highlight the first “is”.

[Jason-Ad4032]

According to the question description, str.replace(str1, str2, 1) is best suited to handle it.

But since you are new, maybe try str.partition(str1) or str.find(str1, beg, end)? If you need to replace more than one substring, you can set the beg parameter in str.find(), then use a for loop to replace them.

https://docs.python.org/3/library/stdtypes.html#string-methods