Python json.JSONDecoder.__repr__ Method

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The Python json.JSONDecoder.__repr__ method returns a string representation of the JSONDecoder instance.

This method is useful for debugging and logging when working with JSON decoding operations.

Syntax

Following is the syntax of the Python json.JSONDecoder.__repr__ method −

JSONDecoder.__repr__()

Parameters

This method does not accept any parameters.

Return Value

This method returns a string representation of the JSONDecoder instance.

Example: Basic Usage

In this example, we use the json.JSONDecoder.__repr__() method to get the string representation of a JSONDecoder instance −

import json

# Create JSONDecoder instance
decoder = json.JSONDecoder()

# Get string representation
repr_string = decoder.__repr__()

print("JSONDecoder Representation:", repr_string)

Following is the output obtained −

JSONDecoder Representation: <json.decoder.JSONDecoder object at 0x7f91f4806030>

Example: Usage in Logging

The __repr__ method can be used for logging to inspect decoder instances −

import json
import logging

# Configure logging
logging.basicConfig(level=logging.INFO)

# Create JSONDecoder instance
decoder = json.JSONDecoder()

# Log the string representation
logging.info("Decoder Instance: %s", decoder.__repr__())

Following is the output logged −

INFO:root:Decoder Instance: <json.decoder.JSONDecoder object at 0x7f6c59daf7a0>

Example: Storing JSONDecoder.__repr__() Output

We can store the representation of a JSONDecoder instance for later inspection −

import json

# Create JSONDecoder instance
decoder = json.JSONDecoder()

# Store representation in a variable
decoder_info = repr(decoder)

print("Stored Decoder Info:", decoder_info)

We get the output as shown below −

Stored Decoder Info: <json.decoder.JSONDecoder object at 0x7fbfb14c6090>

Example: Comparing JSONDecoder Instances

Using __repr__, we can compare different instances of JSONDecoder −

import json

# Create two JSONDecoder instances
decoder1 = json.JSONDecoder()
decoder2 = json.JSONDecoder()

# Compare their representations
print("Decoder 1:", repr(decoder1))
print("Decoder 2:", repr(decoder2))
print("Are they the same?:", repr(decoder1) == repr(decoder2))

Following is the output of the above code −

Decoder 1: <json.decoder.JSONDecoder object at 0x7efd0264e990>
Decoder 2: <json.decoder.JSONDecoder object at 0x7efd0264ecc0>
Are they the same?: False