CODEWITHSUNDEEP
pythonjson
cSharma
cSharma

Reputation: 645

Appending JSON file through python code

I'm trying to create a function that would append data into json file follow with same indentation which is already exist. I created json file as given below.

{
    "TableA":
        [
            {"ID": "10001", "Name": "Chandan","Age": "29"},
            {"ID": "10002", "Name": "Rajesh", "Age": "24"},
            {"ID": "10003", "Name": "Raju", "Age": "25"}
        ]
}

Python Code:

import json

# Write Data on Json file
a_dict = {"ID": "10005", "Name": "Manoj","Age": "31"}
try:
    with open('TableA.json', 'a') as f:
        json_obj = json.dump(a_dict, json.load(f),ensure_ascii=False)
        f.write(json_obj)
        f.close()
except IOError as io:
    print "ERROR: ", io


# Read data from Json File
with open('TableA.json') as data_file:    
    data = json.load(data_file)

for i in data["TableA"]:
    print "ID: \t", i["ID"]
    print "Name: \t", i["Name"]
    print "Age: \t", i["Age"]

Upvotes: 2

Views: 2790

Answers (2)

cSharma
cSharma

Reputation: 645

I made some changes for get proper output. If someone help me to optimize the code then please help for this.

import json

# Write Data
a_dict = {}
try:
    with open('TableA.json') as data_file:    
        data = json.load(data_file)
        temp_list = []
        for dicObj in data["TableA"]:
            temp_list.append(dicObj)
        temp_list.append({"ID": "10006", "Name": "Ritesh","Age": "21"})
        data["TableA"] = temp_list
        a_dict["TableA"] = data["TableA"]
        with open('TableA.json','w') as f:
            f.write(json.dumps(a_dict, indent=4, sort_keys=True, encoding="utf-8"))
except IOError as io:
    print "ERROR: ", io

# Read data from Json File
with open('TableA.json') as data_file:    
    data = json.load(data_file)

for i in data["TableA"]:
    print "ID: \t", i["ID"]
    print "Name: \t", i["Name"]
    print "Age: \t", i["Age"]

Output:

 {
    "TableA": [
        {
            "Age": "29", 
            "ID": "10001", 
            "Name": "Chandan"
        }, 
        {
            "Age": "24", 
            "ID": "10002", 
            "Name": "Rajesh"
        }, 
        {
            "Age": "25", 
            "ID": "10003", 
            "Name": "Raju"
        }, 
        {
            "Age": "31", 
            "ID": "10005", 
            "Name": "Manoj"
        }, 
        {
            "Age": "21", 
            "ID": "10004", 
            "Name": "Ritesh"
        }, 
        {
            "Age": "21", 
            "ID": "10006", 
            "Name": "Ritesh"
        }
    ]
}

Upvotes: 2

iamkhush
iamkhush

Reputation: 2592

Instead of appending only one line, you can also choose to write the whole json again.

with open('TableA.json') as data_file:    
    data = json.load(data_file)
a_dict = {"ID": "10005", "Name": "Manoj","Age": "31"}
new_data = data["TableA"].append(a_dict)
with open('TableA.json','w') as f:
    f.write(json.dumps(new_data, indent=4, sort_keys=True))

Upvotes: 1

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