Getting values from JSON using Python

While I am trying to retrieve values from JSON string, it gives me an error:

data = json.loads('{"lat":444, "lon":555}')
return data["lat"]

But, if I iterate over the data, it gives me the elements (lat and lon), but not the values:

data = json.loads('{"lat":444, "lon":555}')
    ret = ''
    for j in data:
        ret = ret + ' ' + j
return ret

Which returns: lat lon

What do I need to do to get the values of lat and lon? (444 and 555)

Answers:

Thank you for visiting the Q&A section on Magenaut. Please note that all the answers may not help you solve the issue immediately. So please treat them as advisements. If you found the post helpful (or not), leave a comment & I’ll get back to you as soon as possible.

Method 1

If you want to iterate over both keys and values of the dictionary, do this:

for key, value in data.items():
    print key, value

Method 2

What error is it giving you?

If you do exactly this:

data = json.loads('{"lat":444, "lon":555}')

Then:

data['lat']

SHOULD NOT give you any error at all.

Method 3

Using Python to extract a value from the provided Json

Working sample:-

import json
import sys

//load the data into an element
data={"test1" : "1", "test2" : "2", "test3" : "3"}

//dumps the json object into an element
json_str = json.dumps(data)

//load the json to a string
resp = json.loads(json_str)

//print the resp
print (resp)

//extract an element in the response
print (resp['test1'])

Method 4

There’s a Py library that has a module that facilitates access to Json-like dictionary key-values as attributes: https://github.com/asuiu/pyxtension
You can use it as:

j = Json('{"lat":444, "lon":555}')
j.lat + ' ' + j.lon

Method 5

Using your code, this is how I would do it. I know an answer was chosen, just giving additional options.

data = json.loads('{"lat":444, "lon":555}')
    ret = ''
    for j in data:
        ret = ret+" "+data[j]
return ret

When you use “for” in this manner you get the key of the object, not the value, so you can get the value by using the key as an index.

All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0