Convert Generator Object To JSON In Python

JSON (JavaScript Object Notation) is a widely used data interchange format, and Python provides excellent support for working with JSON data. However, when it comes to converting generator objects to JSON, there are several methods to consider. In this article, we’ll explore some commonly used methods.

Convert Generator Object To JSON In Python

Below, are the ways To Convert Generator objects to JSON In Python.

• Using json.dumps() Method
• Using the yield Keyword
• Converting to a Dictionary First

Convert Generator Object To JSON Using json.dumps() Method

In this example, the below code involves the creation of a generator object using a generator expression, followed by its conversion to a list. The list is then serialized to a JSON-formatted string using `json.dumps()`. The resulting JSON data is printed, along with its data type, illustrating the transformation of the generator data into a JSON string.

Python3

import json

# Sample generator object
generator_obj = (x for x in range(5))
print(type(generator_obj))

# Convert the generator object to a list before JSON serialization
result_list = list(generator_obj)
json_data = json.dumps(result_list)

print(json_data)
print(type(json_data))

Output

<class 'generator'>
[0, 1, 2, 3, 4]
<class 'str'>

Convert Generator Object To JSON Using the yield Keyword

In this example, below code defines a generator function `generator_to_list`, which incrementally converts a generator object into a list using the `yield` keyword. The generator object is then instantiated, and the method is applied to convert it into a JSON-formatted string using `json.dumps()`.

Python3

import json

def generator_to_list(generator_obj):
    result_list = []
    for item in generator_obj:
        result_list.append(item)
        yield item

generator_obj = (x for x in range(5))
print(type(generator_obj))

# Method 5: Using yield
result_generator = generator_to_list(generator_obj)
json_data = json.dumps(list(result_generator))

print(json_data)
print(type(json_data))

Output

<class 'generator'>
[0, 1, 2, 3, 4]
<class 'str'>

Convert Generator Object To JSON Convert to a Dictionary First

In this example, below code create a generator object using a generator expression, then converts it to a dictionary format with the key “data” and a list of values. This dictionary is subsequently serialized into a JSON-formatted string using `json.dumps()`. The resulting JSON data is printed along with its data type.

Python3

import json

generator_obj = (x for x in range(5))
print(type(generator_obj))

# Convert to Dictionary
result_dict = {"data": list(generator_obj)}
json_data = json.dumps(result_dict)

print(json_data)
print(type(json_data))

Output

<class 'generator'>
{"data": [0, 1, 2, 3, 4]}
<class 'str'>