Human: 3 how to set a dictionary item to a value or a default. Assistant: 
Here is a Python code to 3 set a dictionary item to a value or a default value

import random

def set_value(dictionary, key, value):
    """Set a dictionary item to a value or a default."""
    if key in dictionary:
        dictionary[key] = value
    else:
        dictionary[key] = DEFAULT_VALUE

# Enter the dictionary
dictionary = {"key1": "value1", "key2": "value2"}

# Enter the key
key = "key1"

# Enter the value
value = "value3"

# Calling the function
print((set_value(dictionary, key, value)))

# Printing the dictionary
print(dictionary)

#Example Output
# None
# {'key1': 'value3', 'key2': 'value2'}

#Remember to inspect code for bugs.