Open and store a list of JSON files in another list

Question

I am trying to store a specific JSON file that resides in each subfolder in a root folder.

I managed to do that and now I have this list:

list_1

which gives:

['C:\\Users\\user\\Downloads\\problem00001\\ground-truth.json',
 'C:\\Users\\user\\Downloads\\problem00002\\ground-truth.json',
 'C:\\Users\\user\\Downloads\\problem00003\\ground-truth.json']

Now I am trying to open each of these JSON files inside a list but only the last one is stored. The goal is to store all of them together instead of only the last.

Here is what I tried:

for k in list_1:
    with open(k, 'r') as f:
        gt = {}
        gt2=[]
        for i in json.load(f)['ground_truth']:
            #print(i) <--- This here prints exactly what I need
            gt[i['unknown-text']] = i['true-author']
        gt2.append(gt)

I guess in each iteration it gets replaced but not sure.

Alperen Kantarcı · Accepted Answer · 2020-08-15 16:27:48Z

2

You reinitialize gt2 list at every for loop. Therefore it should be outside of the loop.

gt2=[]
for k in list_1:
    with open(k, 'r') as f:
        gt = {}
        for i in json.load(f)['ground_truth']:
            #print(i) <--- This here prints exactly what I need
            gt[i['unknown-text']] = i['true-author']
        gt2.append(gt)

answered Aug 15, 2020 at 16:27

Alperen Kantarcı

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2 Comments

saZ Over a year ago

Do you think the gt = {} is not necessary?

Alperen Kantarcı Over a year ago

I don't know the use-case but it looks like it is not necessary. You can directly use gt2.append(i['true-author']) just after the print(i) line, but i think you want some uniqueness.

Henry Yik · Accepted Answer · 2020-08-15 18:00:16Z

0

You are overwriting the local gt2=[] varible each and every time after reading the file. You sould define that before iterating the loop over list_1 as:

gt2 =[]
for k in list_1:
    with open(k, 'r') as f:
        gt = {}
        for i in json.load(f)['ground_truth']:
            #print(i) <--- This here prints exactly what I need
            gt[i['unknown-text']] = i['true-author']
        gt2.append(gt)

edited Aug 15, 2020 at 18:00

Henry Yik

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answered Aug 15, 2020 at 17:17

chirag aggarwal

937 bronze badges

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