This JSON output is from a MongoDB aggregate query. I essentially need to parse the nested data JSON down to the following to the ' total'
and '_id'
values.
{
'ok': 1.0,
'result': [
{
'total': 142250.0,
'_id': 'BC'
},
{
'total': 210.88999999999996,
'_id': 'USD'
},
{
'total': 1065600.0,
'_id': 'TK'
}
]
}
I've tried 5 different techniques to get what I need from it, however I've run into issues using the json
and simplejson
modules.
Ideally, the output will be something like this:
142250.0, BC
210.88999999999996, USD
1065600.0, TK
NOTE: Your JSON response from MongoDB is not actually valid. JSON requires double-quotes ( "
), not single-quotes ( '
).
I'm not sure why your response has single-quotes instead of double-quotes but from the looks of it you can replace them and then just use the built-in json
module:
from __future__ import print_function
import json
response = """{
'ok': 1.0,
'result': [
{
'total': 142250.0,
'_id': 'BC'
},
{
'total': 210.88999999999996,
'_id': 'USD'
},
{
'total': 1065600.0,
'_id': 'TK'
}
]
}"""
# JSON requires double-quotes, not single-quotes.
response = response.replace("'", '"')
response = json.loads(response)
for doc in response['result']:
print(doc['_id'], doc['total'])
Your example text is not valid JSON text . JSON string must start with a "
quotation mark , not '
; but it seems a valid Python literal that you can parse with ast.literal_eval()
function :
import ast
data = ast.literal_eval(input_string)
for item in data["result"]:
print("{total}, {_id}".format(**item))
142250.0, BC
210.89, USD
1065600.0, TK
A better way might be to fix the querying process to get valid JSON and use json
module to parse it.
The response you are getting from the mongodb seems to be the compatible to put for the dictionary type object. as
{
'ok': 1.0, 'result': [
{
'total': 142250.0,
'_id': 'BC'
},
{
'total': 210.88999999999996,
'_id': 'USD'
},
{
'total': 1065600.0,
'_id': 'TK'
}
]
}
Instead of putting it into multiline string and replacing single quotes in double quotes, can't we directly assign it to the dict type object. and perform further operation on it like:
json_data = {
'ok': 1.0,
'result':
[
{
'total': 142250.0,
'_id': 'BC'
},
{
'total': 210.88999999999996,
'_id': 'USD'
},
{
'total': 1065600.0,
'_id': 'TK'
}
]
}
And:
for data in json_data['result']:
print(data['total'], data['_id'])
import json
data = json.loads(mongo_db_json)
result = data['result']
for value_dict in result:
print '{0}, {1}'.format(value['total'], value['_id'])
This should work
This should do.
import json
def parse_json(your_json):
to_dict = json.loads(your_json)
for item in to_dict['results']:
print item['total']
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