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[英]In Python, make a variable act like a function, call a function without parentheses, alias a function as a variable, etc?
[英]How to make parameter of function act like variable string methods
我想制作獲取參數的 function 並將其用作其中的方法。 這是我試圖用 string.upper().lower() 方法做的事情。
def caps_lock(case, string):
print(string.case())
string = 'Hello World'
caps_lock(upper, string)
caps_lock(lower, string)
預期結果
>HELLO WORLD
>hello world
你可以這樣做:
def caps_lock(func, string):
print(func(string))
string = 'Hello World'
caps_lock(str.upper, string)
caps_lock(str.lower, string)
從技術上講,這也是一種選擇,但我不推薦它:
def caps_lock(func_name, string):
print(getattr(string, func_name)())
string = 'Hello World'
caps_lock("upper", string)
caps_lock("lower", string)
def do(obj,method,*params):
getattr(obj,method)(*params)
class Testobj:
def bla(self,*args):
print("bla")
print(args)
do(Testobj(),"bla",1,2,3,4)
#prints: bla (1, 2, 3, 4)
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