I'm new to python and json files and I have a json file which has only one attribute and I want to update each object in the file by adding a new attribute, my json file looks like:
[
{"marka": "تويوتا"},
{"marka": "شيفروليه"},
{"marka": "نيسان"}
]
and I want it to be something like:
[
{"marka": "تويوتا" , "tag" : "MANF"},
{"marka": "شيفروليه" , "tag" : "MANF"},
{"marka": "نيسان" , "tag" : "MANF"}
]
I tried this code but it gives me an error:
with open["haraj_marka_arabic.json", "r"] as jsonFile:
data = json.load[jsonFile]
tmp = data["tag"]
data["tag"] = "MANF"
with open["haraj_marka_arabic.json", "w"] as jsonFile:
json.dump[data, jsonFile]
The error I had is:
TypeError: list indices must be integers, not str
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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: