The double_args decorator is a decorator that takes a function as an argument and returns a new function that doubles the arguments of the original function. Here's an example implementation of the double_args decorator:
def double_args(func): def wrapper(*args, **kwargs): # Double the positional arguments new_args = [2 * arg for arg in args] # Double the keyword arguments new_kwargs = {k: 2 * v for k, v in kwargs.items()} # Call the original function with the doubled arguments return func(*new_args, **new_kwargs) return wrapper |
The double_args decorator takes a function as an argument and returns a new function wrapper. The wrapper function takes any number of positional and keyword arguments using the *args and **kwargs syntax, respectively. It doubles the positional arguments and keyword arguments by creating new lists and dictionaries using a list comprehension and dictionary comprehension, respectively. Finally, it calls the original function with the doubled arguments using the func(*new_args, **new_kwargs) syntax.
Here's an example of using the double_args decorator to double the arguments of a function:
@double_argsdef add_numbers(a, b, c=0): return a + b + cresult = add_numbers(1, 2, c=3)print(result) # Output: 12 (doubled arguments: 2, 4, 6) |
In the above example, the add_numbers function is decorated with the double_args decorator using the @ syntax. When add_numbers is called with arguments 1, 2, and c=3, the double_args decorator doubles the arguments and calls the original add_numbers function with the doubled arguments. The result is 12, which is the sum of the doubled arguments.
Note that the double_args decorator is just one example of a decorator, and decorators can be used to implement a wide variety of functionality beyond just doubling arguments.