Script to show how to use a decorator maker to pass arguments to a decorator

arguments_to_decorators.py

# To show how we can pass arguments to decorators. We will use the decorator maker pattern
# that we saw in the previous example

def decorator_maker_with_args(decorator_arg1, decorator_arg2):

    print 'I make decorators. And I accept arguments: %s, %s' %(decorator_arg1, 
	    decorator_arg2)

    def my_decorator(func):
	# This is the decorator. The ability to pass arguments here is because of closure
	print 'I am the decorator. You passed me arguments: %s, %s' %(decorator_arg1,
		decorator_arg2)
	
	# Do not confuse between decorator arguments with function arguments
	def wrapper(function_arg1, function_arg2):
	    print 'I am the wrapper function. Decorator arguments: (%s, %s). Function arguments: (%s, %s)' \
		    %(decorator_arg1, decorator_arg2, function_arg1, function_arg2)
	    return func(function_arg1, function_arg2)

	return wrapper

    return my_decorator

arg1 = 'Ron Weasley'

@decorator_maker_with_args(arg1, 'Harry Potter')
def decorated_function_with_arguments(func_arg1, func_arg2):
    print 'I am the decorated function. Args: %s, %s' %(func_arg1, func_arg2)


print '\n\n\n'
decorated_function_with_arguments('Hermione Granger', 'Ginny Weasley')
print '\n\n\n'
decorated_function_with_arguments('Hermione Granger', 'Ginny Weasley')