Converting text file into 2-dim array in python

Question

I have a text file (let's call it file.txt) of containing only 1 line of this type:

[1,2,3],[4,5,6],[7,8,9],[10,11,12],[13,14,15]

I want to convert that into a 2-dim array in python so that I will get

[[1 2 3]

[4 5 6]

[7 8 9]

[10 11 12]

[12 14 15]]

I tried using

with open("file.txt", "r") as f:

data = f.readlines()

c = np.array(data)

print(c)

c.dtype

But it returns me ['[1,2,3],[4,5,6],[7,8,9],[10,11,12]'] and dtype('<U34')

Can somebody help me with this?

Ps. Above is just an example. In reality I will work on arbitrary size 2-dim array

Answer 1

Use json to help you

with open("file.txt", "r") as f:
    content = "[" + f.read() + "]"

values = json.loads(content)

values_np = np.array(values)

Answer 2

You can use eval

import numpy as np

str_array = open('file.txt', 'r').read()

arr = np.array(eval(str_array))