Here is part of the data file in json format, containing 1 entry. I need to find the 20 compounds (key:pretty_formula) with the highest eij_max values. I appreciate the help, I apologise if this is a basic question, I am new to all this.
{
"num_results": 3402,
"valid_response": true,
"criteria": "{\"piezo\": {\"$ne\": null}}",
"properties": "[\"pretty_formula\", \"piezo\", \"eij_max\", \"band_gap\", \"energy\"]",
"response": [
{
"pretty_formula": "KMg(PO3)3",
"piezo": {
"eij_max": 0.09337344787836212,
"piezoelectric_tensor": [
[
0.0,
0.0,
0.0,
0.0,
0.0,
0.0660250018229951
],
[
0.06602500182299509,
-0.06602499453211871,
0.0,
0.0,
0.0,
0.0
],
[
0.0,
0.0,
0.0,
0.0,
0.0,
0.0
]
],
"v_max": [
-0.0,
1.0,
0.0
]
},
"eij_max": null,
"band_gap": 4.9474,
"energy": -193.18215352
},
{
"pretty_formula": "Sr2CuSi2O7",
You can easily do something like this to access the eij_max
:
import json
# Opening JSON file
f = open('data.json',)
# returns JSON object as
# a dictionary
data = json.load(f)
# Iterating through the json
# list
for i in data['response']['piezo']['eij_max']
print(i)
# Closing file
f.close()
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