Problems removing \n from a list

Question

I have looked up various solutions that make sense, and tried to implement them in my code. When I print out the list I'm still receiving the number with a newline character. Here is my code:

infile = open(r"C:\Users\rr205951\Documents\nums.txt", "r")
    numList = infile.readlines()
    print("Before: ", numList)

    for num in numList:
        num = num.rstrip('\n')

    print("After: ", numList)

When I run the above code it still returns this following:

Before:  ['15\n', '4\n', '3\n', '25\n', '2000\n', '328\n', '20\n', '9\n', '18\n', '4333\n']
After:  ['15\n', '4\n', '3\n', '25\n', '2000\n', '328\n', '20\n', '9\n', '18\n', '4333\n']

Check out [this](http://stackoverflow.com/a/30881893/4099593) answer. It covers more than 5 ways of doing your job — Bhargav Rao, Jul 14 '15 at 00:41

score 2 · Answer 1 · answered Jul 14 '15 at 00:30

2

You're not actually modifying numList. You could do a one-liner list comprehension like so:

#read your lines as you did, but add the following after. numList = [num.strip() for num in numList]

answered Jul 14 '15 at 00:30

blasko

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This is good because it explains why OPs code is not working as desired. – brandon.bell Jul 14 '15 at 00:37

score 0 · Answer 2 · answered Jul 14 '15 at 00:31

0

numList = map(lambda s: s.strip(), numList)

answered Jul 14 '15 at 00:31

erip

16,374
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Problems removing \n from a list

2 Answers2