Reversing word in strings yields unexpected result

[Dec]

Hello there, 
I'm recently learning python using python 3.6
I'm confused why the str.join seems not to work properly in my code
there are many examples I've read and I can't find the example using input()

def rev():
   my_input=input("Please input what you want to reverse: ")
   my_output=my_input.split()
   for word in my_output:
       my_output=" ".join(my_output[::-1])
   print(my_output)

rev()

If the input is "Python forum" the output should be "nohtyP murof". However it would yield "n o h t y P   m u r o f", and if I remove the space in the join, it would yield "nohtyPmurof". Help me, I'm stuck on this. Thank you. PS: if you would, please don't use a complex example like doing this whole task in one line, I really am a beginner.

[metulburr]

converting to a list, and back to a string is pointless as you can create a new string reversed

>>> s = "Python Forum"
>>> s[::-1]
'muroF nohtyP'

PS: if you would, please don't use a complex example like doing this whole task in one line, I really am a beginner.

The [::-1] is splicing. in which is [START:STOP:STEP] where any field can be empty. start and stop is empty which means the whole string, -1 for step reversing the whole string. More info here under indexing and splicing
https://python-forum.io/Thread-Basic-Strings

EDIT:
just realized your rev the words as well. Here is how

s = 'Python Forum'
rev_str = s[::-1]
rev_words = rev_str.split()[::-1]
print(' '.join(rev_words))

[sparkz_alot]

Yes, but it looks like he wants to keep the words in the same order, just reverse the letters.

[sparkz_alot]

My clunky solution:

def rev():
    my_input = input("Please input what you want to reverse: ")
    my_output = my_input.split()
    new_list = []
    for word in my_output:
        new_list.append(word[::-1])
    reversy = " ".join(new_list)
    print(reversy)

rev()

Output:

Output:
C:\Python36\python.exe C:/Python/Gui/tkinter/raspi/scratch1.py
Please input what you want to reverse: Python forum
nohtyP murof

Process finished with exit code 0

[wavic]

In [1]: output = ' '.join([word[::-1] for word in 'Python forum'.split()])

In [2]: output
Out[2]: 'nohtyP murof'