Help with string practice

[Hermann_Fegelein]

Hi everyone,
I'm looking for some help with an exercise I was doing, regarding strings in python.
This program is supposed to find the longest word out of a list of words the user types (i.e. if I type "chicken, dog and cat" the output will be "chicken"), but for the sake of a possibility, if I did type, for example, only "dog and cat", the output will always be dog. Thing is, I want my program to print them both.
Here is the code:

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def longest_word(l):     lenl=[]     for n in l:         lenl.append((len(n), n))     lenl.sort()     return(lenl[-1][1]) lis=input("Insert some words ").replace(",", " ").replace("and", " ") lispar=lis.split(" ") print(longest_word(lispar))

Thanks in advance! ( Oh, and if you find anything I could improve here, furthermore, just let me know, it's very appreciated )

[ichabod801]

You have the longest word and you know it's length (len[-1][0]). You need to gather all the words with that length:

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def longest_word(l):     lenl=[]     for n in l:         lenl.append((len(n), n))     lenl.sort(reverse = True)  # Reversing makes the next part easier.     longest = []     for length, word in lenl:         if length == lenl[0][0]:             longest.append(word)         else:             break     return(list(reversed(longest)))  # Revesing again to put them back in order. lis=input("Insert some words ").replace(",", " ").replace("and", " ") lispar=lis.split(" ") print(longest_word(lispar))

A handy thing when building lists like this is a list comprehension:

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output = [] for item in data:     if condition:         output.append(function(item))   # is equivalent to   output = [function(item) for item in data if condition]

So we can redo the above code as:

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def longest_word(l):     lenl=[(len(word), word) for word in l]     lenl.sort(reverse = True)     longest = [word for length, word in lenl if length == lenl[0][0]]     return(longest[::-1])  # Another way to revese a list. lis=input("Insert some words ").replace(",", " ").replace("and", " ") lispar=lis.split(" ") print(longest_word(lispar))

Other advice: Avoid single letter variable names. Descriptive, full word names make your code more readable. 'longest_word' is a good name, stick to things like that.

[Hermann_Fegelein]

Thank you very much for the explanation! Have a good day :)