Python JSON Append to JSON file using Python [Updating a JSON file.]
Append to JSON file using Python [Updating a JSON file.]
Functions Used:
- json.loads(): json.loads() function is present in python built-in json module. This function is used to parse the JSON string.
Syntax: json.loads(json_string)
Parameter: It takes JSON string as the parameter.
Return type: It returns the python dictionary object.
- json.dumps(): json.dumps() function is present in python built-in json module. This function is used to convert Python object into JSON string.
Syntax: json.dumps(object)
Parameter: It takes Python Object as the parameter.
Return type: It returns the JSON string.
- update(): This method update the dictionary with elements from another dictionary object or from an iterable key/value pair.
Syntax: dict.update([other])
Parameters: Takes another dicitonary or an iterable key/value pair.
Return type: Returns None.
Updating a JSON file.
Suppose the json file looks like this:
{
"emp_details":[
{"name": "Bob",
"languages": "English"}
]
}
We want to add another json data after emp_details. Below is the implementation.
Python code:
import json
# function to add to JSON
def write_json(data, filename='emp.json'):
with open(filename,'w') as f:
json.dump(data, f, indent=2)
with open('emp.json') as json_file:
data = json.load(json_file)
temp = data['emp_details']
# python object to be appended
y = '{"name": "madhu", "languages": "Hindi"}'
# appending data to emp_details
temp.append(y)
write_json(data)
output:
{
"emp_details": [
{
"name": "Bob",
"languages": "English"
},
{"name":"madhu",
"languages": "Hindi"}
]
}
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