Reading a file with multiple list of lists from into python

Question

This question is very similar to Reading a list of lists from a file as list of lists in python, except that the file I have has multiple lines with list of lists, such as

[[1,2,3],[4,5]]
[[1], [4], [6], [1,2,3]]
[[]]
[[1,5]]

Following the advice from above link, my below attempt failed

import json
f = open('idem_perms.txt', 'r')
for line in f:
    e = json.load(line)

throws the error

--> 287     return loads(fp.read(),
    288         encoding=encoding, cls=cls, object_hook=object_hook,
    289         parse_float=parse_float, parse_int=parse_int,

AttributeError: 'str' object has no attribute 'read'

What am I doing wrong?

Raymond Hettinger · Accepted Answer · 2019-10-30 15:20:09Z

1

The load() should be loads().

The first function expects a file object and the second expects a string.

Hope this helps :-)

answered Oct 30, 2019 at 15:20

Raymond Hettinger

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Rithin Chalumuri · Accepted Answer · 2019-10-30 15:25:41Z

1

import json

with open('idem_perms.txt', 'r') as file:
    result = [json.loads(line) for line in file.readlines()]

print(result)

Outputs:

[[[1, 2, 3], [4, 5]], [[1], [4], [6], [1, 2, 3]], [[]], [[1, 5]]]

answered Oct 30, 2019 at 15:25

Rithin Chalumuri

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