Converting dictionary to JSON

ghz 3months ago ⋅ 137 views 
r = {'is_claimed': 'True', 'rating': 3.5}
r = json.dumps(r)
file.write(str(r['rating']))

I am not able to access my data in the JSON. What am I doing wrong?

TypeError: string indices must be integers, not str

Answers

The error you’re encountering is due to the fact that after you call json.dumps(r), r becomes a JSON-formatted string, not a dictionary. When you then try to access r['rating'], it raises a TypeError because strings can only be indexed using integers.

To fix this, you should first deserialize the JSON string back into a dictionary using json.loads(), or directly access the original dictionary before converting it to JSON. Here are two ways to do it:

Option 1: Accessing the Original Dictionary

If you still have access to the original dictionary, you can write the rating directly without converting it to JSON:

import json

r = {'is_claimed': 'True', 'rating': 3.5}
file.write(str(r['rating']))  # Access the rating directly

Option 2: Deserialize the JSON String

If you need to work with the JSON string for other reasons, deserialize it back into a dictionary:

import json

r = {'is_claimed': 'True', 'rating': 3.5}
r_json = json.dumps(r)  # Convert to JSON string

# Deserialize back to a dictionary
r_dict = json.loads(r_json)

# Now you can access the 'rating'
file.write(str(r_dict['rating']))  # Access the rating from the dictionary

Summary

  • Option 1 is simpler if you don’t need the JSON format afterward.
  • Option 2 allows you to keep the JSON representation but requires you to convert it back to a dictionary to access individual fields.
#python