如何从文本文件读取数组数据到numpy数组？

Question

I have a text file, data.txt , having data in this format:

 [[ 1.0   2.0   3.0]
 [1.0    2.0   3.0]
 [1.0    2.0   3.0]
 [1.0    2.0   3.0]]

How can I read data in this format into numpy array in jupyter ?

Answer 1

import numpy as np

with open("data.txt") as infile:
  my_array = np.array([map(float,line.strip(" []\n").split()) for line in infile.readlines()])

Answer 2

This should work and is generalizable to other types than float :

with open("data.txt") as infile:
    np.fromstring( infile.read().replace("[","").replace("]", ""), sep="   ").reshape(-1,3)

Note: np.fromstring returns a 1d array, I added a reshaping assuming 3 columns.