Compare two json dictionary in Python

Question

I want to compare two dictionaries. One is a template, and one is stored in a specific file.

The code is this:

#!/usr/bin/env python

import json

template = {"giorno": 21, "mese": "aprile", "ora": "21"}
newww = "palestra.json"


g_temp = template['giorno']

with open(newww, 'r') as f:
        n_temp = json.load(f)
        print n_temp
        n_temp_new = json.dumps(n_temp, ensure_ascii=False)
        print(n_temp_new)

if g_temp == n_temp_new['giorno']:
        print("no")
else:
        print("yes")

palestra.json :

{"giorno": 21, "mese": "aprile", "ora": "21"}

output:

{u'giorno': 21, u'mese': u'aprile', u'ora': u'21'}
{"giorno": 21, "mese": "aprile", "ora": "21"}
Traceback (most recent call last):
  File "./prova.py", line 25, in <module>
    if g_temp == n_temp_new['giorno']:
TypeError: string indices must be integers

How can I compare these two dictionaries?

n_temp_new is a string, not a dict, because json.dumps returns a string representation of a dict. You probably wanted to compare g_temp with n_temp['giorno']. — stasdeep
– stasdeep, Commented May 10, 2018 at 9:05
yes! now it works! sorry but i'm new with promgramming. thanks ;) — Luca Deila
– Luca Deila, Commented May 10, 2018 at 9:07
In fact, you don't need the n_temp_new = json.dumps(n_temp, ensure_ascii=False) at all. — Benares
– Benares, Commented May 10, 2018 at 11:56

Benares · Accepted Answer · 2018-05-10 12:56:57Z

1

The error occurs because n_temp_new is a string, not a dict and thus does not allow string indexing. Note that json.dumps returns a string representation of a dict but not a dict itself.

You probably wanted to compare g_temp with n_temp['giorno'] like this:

if g_temp == n_temp['giorno']:
    print('no')
else:
    print('yes')

edited May 10, 2018 at 12:56

Benares

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answered May 10, 2018 at 9:19

stasdeep

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