convert .txt file into a list of integers in python

Question

Say, I have a file which has the following content:

I want create it into a list of integers in Python3, i.e [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]

f = open("stan.txt","r")

myList = []

for line in f:
   myList.append(line)

print(myList)

lst = []
for i in myList:
    i = i[:-1]
    lst.append(int(i))
print(lst)

It is my verbose code. Is there an elegant and concise way to do it?

The numbers in txt file should be written not in one line but in subsequent files. I wrote it this way but it changed — Fadai Mammadov, Dec 22 '16 at 06:11
This question is such a duplicate, its duplicates have duplicates. — pvg, Dec 22 '16 at 06:14

score 1 · Answer 1 · answered Dec 22 '16 at 06:13

1

If the file is not very large, read it as a string, split the string into numbers, and apply int() to each of them using list comprehension:

with open("stan.txt") as f:
    lst = [int(x) for x in f.read().split()]

answered Dec 22 '16 at 06:13

DYZ

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Thank you for your reply. I wish I could upvote it. – Fadai Mammadov Dec 22 '16 at 06:16
The only downside here is that you're reading all of the file into memory before processing it rather than iterating over it line by line. – rumdrums Dec 22 '16 at 06:20
@rumdrums As I said, it works when the file is not large. – DYZ Dec 22 '16 at 06:24

rumdrums · Answer 2 · 2016-12-22T06:23:22.030

-1

Use a list comprehension:

with open('stan.txt') as f:
  my_list = [ int(i) for i in f ]

edited Dec 22 '16 at 06:23

answered Dec 22 '16 at 06:15

rumdrums

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`int()` removes spaces, no need to `.rstrip()`. – DYZ Dec 22 '16 at 06:19

convert .txt file into a list of integers in python

2 Answers2