CODEWITHSUNDEEP
python
BarryNailor
BarryNailor

Reputation: 19

Making a list of tuples from a text file

I need to create a list of a list of tuples from a text file. The file is like this: 

[]
[(1, 4)]
[(1, 4), (2, 6)]
[(1, 4), (2, 16), (3, 4)]
[(1, 4), (2, 22), (3, 24), (4, 1)]
[(1, 4), (2, 32), (3, 48), (4, 16)]
[(1, 4), (2, 38), (3, 92), (4, 52), (5, 4)]

I need to extract each line into a list called combinations and be able to call the values inside the tuples like this: 

combinations[1] // (1,4) <br>
combinations[1][1] // 4 <br>

I'm new to python, I can get each line into the list but they are of string type and a list of tuples

with open("combinations.txt", 'r') as f:
    combinations = f.read().splitlines()

What I need: 

combinations[1] // (1,4)
combinations[1][1] // 4

What I get: 

combinations[1] // '[(1, 4)]'

Upvotes: 0

Views: 285

Answers (1)

Reut Sharabani
Reut Sharabani

Reputation: 31349

Since these data structures can be read by python, you can do it with ast.literal_eval:

import ast
with open('combinations.txt') as f:
    tuples = list(map(ast.literal_eval, f))

Your tuples are now in the list tuples.

Good luck!

Upvotes: 2

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