如何使用装饰器来定义函数的默认参数?

def my_function(name, age=25):
    # Some function logic
    return "Hello, {}!".format(name)

# Without decorator
print(my_function("John"))

# With decorator
@decorator
def my_function(name, age=25):
    return "Hello, {}!".format(name)

# Output:
# Hello, John!

Explanation:

• The @decorator decorator is used to wrap the my_function function.
• The age parameter is set to a default value of 25.
• When the function is called without any arguments, the age parameter will automatically be set to 25.
• The decorator allows you to define custom behavior for the decorated function, such as logging or modifying the function signature.

Benefits of using a decorator:

• Code reusability: You can define the default parameter values once and use them in multiple functions.
• Flexibility: You can customize the behavior of the function without modifying the function itself.
• Logging: You can easily add logging statements to the decorated function.

Note:

• Decorators are called before the function is executed.
• The default parameter value can be any Python data type, including functions.
• You can use multiple decorators on the same function.