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Python Python Collections (2016, retired 2019) Tuples Stringcases

Sean Flanagan
Sean Flanagan
33,235 Points
Posted by Sean Flanagan
Sean Flanagan
33,235 Points

What's wrong with this function?

Hi.

I've incorporated all the formats into my code as best I can. What am I doing wrong?

stringcases.py 
def stringcases(my_string):
    return (my_string.upper(), my_string.lower(), my_string.capitalize(), my_string.reverse())

3 Answers

Mark Kastelic
Mark Kastelic
8,147 Points

Hi Sean,

You're close! Just replace the last element of your tuple with ''.join(reversed(my_string)) as I suggested:

def stringcases(my_string):
    return (my_string.upper(), my_string.lower(), my_string.title(), ''.join(reversed(my_string)))

Note: I used two single quotes for the empty string, but you could also use "" as well.

Mark Kastelic
Mark Kastelic
8,147 Points
Mark Kastelic
Mark Kastelic
8,147 Points

Sean,

The capitalize() function will only capitalize the first letter of the string. I believe you need to use the title() function instead which will capitalize the first letter of every word. For the string reversal you need to use: ''.join(reversed(my_string)). Note: that's an empty string (two single quotes with no space preceding the .join). Hope this helps.

Sean Flanagan
Sean Flanagan
33,235 Points
Sean Flanagan
Sean Flanagan
33,235 Points

Hi Mark.

Thanks for your help. Here's what I came up with:

def stringcases(my_string):
    return my_string.lower().upper().title().join(reversed(""))

When that didn't work, I tried:

def stringcases(my_string):
    return (my_string.upper(), my_string.lower(), my_string.title(), my_string.join(reversed(""))
Sean Flanagan
Sean Flanagan
33,235 Points
Sean Flanagan
Sean Flanagan
33,235 Points

Done.

I've upvoted and given you Best Answer.

Thank you Mark!