CODEWITHSUNDEEP
pythonreverse
Aaron Zhang
Aaron Zhang

Reputation: 1

How to reverse a list without specific elements being reversed in python

f = open (FilePath, "r")

#print f

with open(FilePath, "r") as f:

    lines = f.readlines()
    #print lines


    for iterms in lines:
        new_file = iterms[::-1]
        print new_file

it gives me a result like this: 7340.12,8796.4871825,0529.710635,751803.0,fit.69-81-63-40tuo

original list is like this: out04-32-45-95.tif,0.330693,536043.5237,5281852.0362,20.2260

it is supposed to be like this: 20.2260, ...........out04-32-45-95.tif

Upvotes: 0

Views: 41

Answers (1)

Moinuddin Quadri
Moinuddin Quadri

Reputation: 48092

You should be using your for loop like:

for iterms in lines:
    new_file = ','.join(iterms.split(',')[::-1])
    print new_file

Explanation:

In your current code, the line iterms[::-1] reverses the entire string present in your line. But you want to only reverse the words separated by ,.

Hence, you need to follow below steps:

  1. Split the words based on , and get list of words:

    word_list = iterms.split(',')

  2. Reverse the words in the list:

    reversed_word_list = word_list[::-1]

  3. Join the reversed wordlist with ,

    new_line = ','.join(reversed_word_list)

Upvotes: 2

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