human
custom json serialize tuple.
assistant
Here is a Python program to custom json serialize tuple

import json

def custom_json_serialize_tuple(tup):
    """Custom json serialize tuple

    Args:
        tup (tuple): Tuple to be serialized

    Returns:
        json.dumps(tup)
    """
    return json.dumps(tup)

# Enter the tuple
tup = (1, 2, 3)

# Calling the function
print((custom_json_serialize_tuple(tup)))

#Example Output
# [1, 2, 3]

#Remember to inspect code for bugs.