Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python

Posted by curtis allen
curtis allen
28,800 Points

[Python] Python Collections - code challenge stringcases

Hey Guys, What am I doing wrong? I tested my code in my terminal and everything seem to come out correctly. What do I have to do to return a tuple? Below is my code.

def stringcases(my_string):
      uppercase = tuple(list(my_string.upper()))
      lowercase = tuple(list(my_string.lower()))
      titlecase = tuple(list(my_string.title()))
      reverse = tuple(list(my_string[::-1]))
      return (uppercase, lowercase, titlecase, reverse)
Phillip Bailey
Phillip Bailey
1,822 Points

I ended up doing this to make it clean as well. I'm embarrassed because I at first was trying to make a for loop to iterate through the words in the string and capitalized. I didn't know about title()

def stringcases(string): return ( string.upper(), string.lower(), string.title(), string[::-1] )

9 Answers

Chris Shaw
Chris Shaw
26,676 Points

Hi Curtis,

Which code challenge is this for as I don't remember needing to create a tuple when transforming the case of a string.

curtis allen
curtis allen
28,800 Points

It is the string case code challenge for the Tuples section. Below is the question that came with the challenge.

Create a function named stringcases that takes a string and returns a tuple of four versions of the string: uppercased, lowercased, titlecased (where every word's first letter is capitalized), and a reversed version of the string.

Chris Shaw
Chris Shaw
26,676 Points

Indeed it does, funny how 2 days can make you forget that =)

So what it's asking for is a single tuple containing all 4 types of the string, I've simplified your code a to but it does function the way the challenge expects it to.

def stringcases(my_string):
  return (my_string.upper(), my_string.lower(), my_string.title(), my_string[::-1])
curtis allen
curtis allen
28,800 Points

Thanks Chris!

Chris Shaw
Chris Shaw
26,676 Points

You're welcome

Lisa Burbon
Lisa Burbon
1,030 Points
Lisa Burbon
Lisa Burbon
1,030 Points 
def stringcases(string):
    a = string.upper()
    b = string.lower()
    c = string.title()
    d = string[::-1]
    return a,b,c,d
Michael Moore
Michael Moore
7,121 Points

ahhh +1, i was using capitalize() and could not figure out for the life of me why it wouldn't accept it. Everything else was just the same as your 2 line answer above. I had

def stringcases(string):
    return(string.upper(), string.lower(), string.capitalize(), string[::-1])

when it should have been:

def stringcases(string):
    return(string.upper(), string.lower(), string.title(), string[::-1])

I also had some crazy code to make it reverse, told myself i wouldn't look up the easiest way to reverse til i figured it out myself. I had one of those slap yourself in the forehead moments when i saw the [::-1] on stack overflow. This was my reverse code.

  reversed = []
  x = (len(string)-1)

  while x >= 0:
    reversed.append(string[x])
    x-=1

  reversed_word = "".join(reversed)
Douglas Ngwenya
Douglas Ngwenya
3,132 Points
Douglas Ngwenya
Douglas Ngwenya
3,132 Points

def stringcases(items): return (items.upper(), items.lower(), items.title(), items[::-1])

yanni jain
yanni jain
693 Points
yanni jain
yanni jain
693 Points

a,b,c,d= 'kenneth'.upper(), 'love'.lower(), 'developer'.title(), 'best'[-1::-1] def stringcases(): return a,b,c,d i don't know why my answer is showing error when i am tuning on my python ide it is working fine there !! .

João Elvas
João Elvas
5,400 Points
João Elvas
João Elvas
5,400 Points

Can I ask why if i do

 (st.upper(), st.lower(), st.capitalize(), st[::-1])

It says that it's wrong but the console output is the same?

Eray Ates
Eray Ates
14,292 Points

If you try a string which include space and than capitalize works like below,

my_string = 'hello world'
my_string.title()
=> 'Hello World'
my_string.capitalize()
=> 'Hello world'
Max Meijer
Max Meijer
3,048 Points

It asked for a function this is what is has to be def stringcases(string): return(string.upper(), string.lower(), string.capitalize(), string[::-1])

turaboy holmirzaev
turaboy holmirzaev
19,198 Points
turaboy holmirzaev
turaboy holmirzaev
19,198 Points

def stringcases(x): return x.upper(), x.lower(), x.title(), x[::-1]

Aldo Šuran
Aldo Šuran
4,882 Points
Aldo Šuran
Aldo Šuran
4,882 Points

So I wrote the correct code, but when I tried in PyCharm the result was not a touple (at least I think). It gave four words, but not separated by commas. Am I wrong in understanding what is a touple?

Daniel JAHENY
Daniel JAHENY
1,912 Points
Daniel JAHENY
Daniel JAHENY
1,912 Points

Hope this can be useful to someone. For this challenge I first created an empty list which I appended with each string format then finally turned the list into a tuple:

def stringcases (argument): my_list = [] for x in argument: my_list.append(argument.upper()) my_list.append(argument.lower()) my_list.append(argument.title()) my_list.append(argument[::-1]) break my_tuple = tuple(my_list) return (my_tuple)

piotr korczowski
piotr korczowski
9,986 Points
piotr korczowski
piotr korczowski
9,986 Points

string = "This is a string"

def stirngcases(**string): for str in string: print(str)

print(string[::-1],string.lower(), string.upper(), string.title())