try this script:
with open["data.json"] as f:
data = json.load[f]
data["id"] = 134
json.dump[data, open["data.json", "w"], indent = 4]
the result is:
{
"name":"mynamme",
"id":134
}
Just the arrangement is different, You can solve the problem by converting the "data" type to a list, then arranging it as you wish, then returning it and saving the file, like that:
index_add = 0
with open["data.json"] as f:
data = json.load[f]
data_li = [[k, v] for k, v in data.items[]]
data_li.insert[index_add, ["id", 134]]
data = {data_li[i][0]:data_li[i][1] for i in range[0, len[data_li]]}
json.dump[data, open["data.json", "w"], indent = 4]
the result is:
{
"id":134,
"name":"myname"
}
you can add if condition in order not to repeat the key, just change it, like that:
index_add = 0
n_k = "id"
n_v = 134
with open["data.json"] as f:
data = json.load[f]
if n_k in data:
data[n_k] = n_v
else:
data_li = [[k, v] for k, v in data.items[]]
data_li.insert[index_add, [n_k, n_v]]
data = {data_li[i][0]:data_li[i][1] for i in range[0, len[data_li]]}
json.dump[data, open["data.json", "w"], indent = 4]
View Discussion
Improve Article
Save Article
View Discussion
Improve Article
Save Article
The full form of JSON is JavaScript Object Notation. It means that a script [executable] file which is made of text in a programming language, is
used to store and transfer the data. Python supports JSON through a built-in package called JSON. To use this feature, we import the JSON package in Python script. The text in JSON is done through quoted-string which contains the value in key-value mapping within { }.
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 updates the dictionary with elements from another dictionary object or from an iterable key/value pair.
Syntax: dict.update[[other]]
Parameters: Takes another dictionary or an iterable key/value pair.
Return type: Returns None.
Example 1: Updating a JSON string.
Python3
import json
x = '{ "organization":"GeeksForGeeks",
"city":"Noida",
"country":"India"}'
y = {"pin":110096}
z = json.loads[x]
z.update[y]
print[json.dumps[z]]
Output:
{“pin”: 110096, “organization”: “GeeksForGeeks”, “country”: “India”, “city”: “Noida”}
Example 2: Updating a JSON file. Suppose the JSON file looks like this.
We want to add another JSON data after emp_details. Below is the implementation.
Python3
import json
def write_json[new_data, filename='data.json']:
with open[filename,'r+'] as file:
file_data = json.load[file]
file_data["emp_details"].append[new_data]
file.seek[0]
json.dump[file_data, file, indent = 4]
y =
{"emp_name":"Nikhil",
"email": "",
"job_profile": "Full Time"
}
write_json[y]
Output: