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Python Python Collections (2016, retired 2019) Tuples Stringcases

Evgeny Shilov
Evgeny Shilov
21,283 Points
Posted by Evgeny Shilov
Evgeny Shilov
21,283 Points

Exercise: "Bummer! Didn't get back all of the right cases"

Can't find my mistake. Could somebody help pls?

stringcases.py 
def stringcases(some_string):
    some_tuple = ()

    upper_string = some_string.upper()
    lower_string = some_string.lower()
    capitalized_string = some_string.capitalize()
    reversed_string = some_string[-1::-1]

    some_tuple = (upper_string, lower_string, capitalized_string, reversed_string)
    print(some_tuple)
    return some_tuple

1 Answer

Alexander Davison
Alexander Davison
65,469 Points
  1. To reverse a string, you should add [::-1] in front of it, not [-1::-1].
  2. The challenge was expecting you to use the .title() function, not the .capitalize() function. They do different things (title capitalizes the first letter on every word while capitalize just capitalizes the very first one).
  3. Why are you printing the tuple?

In order to fix this, you have to fix the above:

def stringcases(string):
    uppercased = string.upper()
    lowercased = string.lower()
    titled = string.title()
    reversed = string[::-1]

    return uppercased, lowercased, titled, reversed

I hope you understand :)

~Alex

Evgeny Shilov
Evgeny Shilov
21,283 Points
Evgeny Shilov
Evgeny Shilov
21,283 Points

Alex, you are the best! Lightning fast response. Thank you

  1. Yes, it finally clicked for me how this slice works
  2. Was not clear for me from the description
  3. Was trying to debug it locally
Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

It's not wrong to use string[-1::-1] to reverse the string but it's not necessary to specify the start to be -1

Alexander Davison
Alexander Davison
65,469 Points

Oh, I didn't know XP

Thanks for responding

john larson
john larson
16,594 Points

Alex, thanks for your clarification on title vs capitalize. I didn't see the difference until I did a string with multiple words