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+--- Thread: Reversing word in strings yields unexpected result (/thread-3356.html)
Reversing word in strings yields unexpected result - Dec - May-17-2017
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.
RE: Reversing word in strings yields unexpected result - metulburr - May-17-2017
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'
Quote: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))
RE: Reversing word in strings yields unexpected result - sparkz_alot - May-17-2017
Yes, but it looks like he wants to keep the words in the same order, just reverse the letters.
RE: Reversing word in strings yields unexpected result - sparkz_alot - May-17-2017
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 0RE: Reversing word in strings yields unexpected result - wavic - May-17-2017
In [1]: output = ' '.join([word[::-1] for word in 'Python forum'.split()]) In [2]: output Out[2]: 'nohtyP murof'