how to import json in python code example

Example 1: python import json into pymongo

import json
from pymongo import MongoClient

client = MongoClient('localhost', 27017)
db = client['countries_db']
collection_currency = db['currency']

with open('currencies.json') as f:
    file_data = json.load(f)

# if pymongo < 3.0, use insert()
collection_currency.insert(file_data)
# if pymongo >= 3.0 use insert_one() for inserting one document
collection_currency.insert_one(file_data)
# if pymongo >= 3.0 use insert_many() for inserting many documents
collection_currency.insert_many(file_data)

client.close()

Example 2: python json string to object

import json

x =  '{ "name":"John", "age":30, "city":"New York"}'
y = json.loads(x)

print(y["age"])

Example 3: python to json

# a Python object (dict):
x = {
  "name": "John",
  "age": 30,
  "city": "New York"
}

# convert into JSON:
y = json.dumps(x)

Example 4: python import json data

# Basic syntax:
import ast
# Create function to import JSON-formatted data:
def import_json(filename):
  for line in open(filename):
    yield ast.literal_eval(line)
# Where ast.literal_eval allows you to safely evaluate the json data.
# 	See the following link for more on this:
# 	https://stackoverflow.com/questions/15197673/using-pythons-eval-vs-ast-literal-eval
        
# Import json data
data = list(import_json("/path/to/filename.json"))

# (Optional) convert json data to pandas dataframe:
dataframe = pd.DataFrame.from_dict(data)
# Where keys become column names