英文:
Is it possible to pass a function argument into a decorator?
问题
Here is the translated code portion:
def my_decorator(func):
def inner():
"""do stuff with arg"""
func()
return func
return inner
@my_decorator
def my_func(arg):
pass
If you have any further questions or need additional translations, please let me know.
英文:
def my_decorator(func):
def inner():
"""do stuff with arg"""
func()
return func
return inner
@my_decorator
def my_func(arg):
pass
I wish to make the argument passed to the function my_function() to be passed to the decorator my_decorator(). I know it is possible to pass a variable to the decorator by putting it in a call like this: @my_decorator("arg"), but I am using the pycord library, which passes arguments directly to the function.
Is there any way to do it in Python, or will I have to find another way?
I could put this code in the function itself, but if the code is expanded later, it could cause problems, and it's way easier to maintain and update a single decorator/wrapper than change multiple places in code.
答案1
得分: 3
是的，您的 def inner(): 应该改为 def inner(arg):；毕竟，您从装饰器返回的函数有效地替换了原始函数。以下是代码的翻译部分：
def my_decorator(func):
def inner(arg):
print(f"将 {arg} 增加 1 后再传递给 func 前的操作！")
return func(arg + 1)
return inner
@my_decorator
def my_func(arg):
print(f"my_func: {arg}")
my_func(9)
输出结果为：
将 9 增加 1 后再传递给 func 前的操作！
my_func: 10
英文:
Yes – your def inner(): should be def inner(arg):; after all, the function you return from the decorator effectively replaces the original function.
def my_decorator(func):
def inner(arg):
print(f"Going to increase {arg} by 1 before passing it to func!")
return func(arg + 1)
return inner
@my_decorator
def my_func(arg):
print(f"my_func: {arg}")
my_func(9)
prints out
Going to increase 9 by 1 before passing it to func!
my_func: 10
答案2
得分: 0
是的，这是可能的，可以使用 *args 和 **kwargs 来实现。
def my_decorator(func):
def inner(*args, **kwargs):
"""处理参数的操作"""
func(*args, **kwargs)
return inner
@my_decorator
def my_func(arg):
pass
请注意，我已经将HTML实体编码 " 替换为正常的双引号。
英文:
Yes, that is possible and could be achieved using *args amd **kwargs
def my_decorator(func):
def inner(*args, **kwargs):
"""do stuff with arg"""
func(*args, **kwargs)
return func
return inner
@my_decorator
def my_func(arg):
pass
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