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Python Python Collections (2016, retired 2019) Tuples Stringcases

Dillon Reyna
Dillon Reyna
9,531 Points
Posted by Dillon Reyna
Dillon Reyna
9,531 Points

Got the wrong string for reversed?

Here's the code I used - checked in repl to ensure that it reversed the given string completely. What's missing?

stringcases.py 
def stringcases(x):
    tlist = []
    a = x.upper()
    b = x.lower()
    c = x.title()
    for char in x:
      tlist.append(char)
    d = tlist[::-1]
    return(a, b, c, d)

1 Answer

andren
andren
28,558 Points
andren
andren
28,558 Points

The issue is that you return the string as a reversed list, not a reversed string. Since you convert it into a list you have to convert it back into a string again before you return it.

You can convert it to a string by joining the list like this:

def stringcases(x):
    tlist = []
    a = x.upper()
    b = x.lower()
    c = x.title()
    for char in x:
        tlist.append(char)
    d = ''.join(tlist[::-1])
    return(a, b, c, d)

However you didn't really need to convert it to a list in the first place, as slices work on strings just like they do on lists. That means that you can slice the string directly like this:

def stringcases(x):
    a = x.upper()
    b = x.lower()
    c = x.title()
    d = x[::-1]
    return(a, b, c, d)

Which is a lot simpler than converting it to a list.