有没有更好的Pythonic / Object Oriented方式来选择在运行时执行哪个特定的类方法,具体取决于对象的类型,因为使用该type()
方法不被认为是优雅的(?)
我为我正在使用的三种数据类型编写了以下代码。它基本上将不同的函数作为值存储在字典中,并将其与其对应的对象类型作为键配对:
import pathlib
import _io
########################################
class choose_for :
def __init__(self, var):
func_dict = {str:self.func1, pathlib.WindowsPath:self.func2, _io.TextIOWrapper:self.func3}
self.func = func_dict[type(var)]
def func1(self) :
print("Because it is for STRING like \n")
def func2(self) :
print("Because it is for PATH like \n")
def func3(self) :
print("Because it is for FILE_POINTER like \n")
def execute(self):
print("This object will be executed by : ", self.func)
self.func()
########################################
var1 = str("something")
var2 = pathlib.Path()
var3 = _io.open("file.txt")
########################################
chosen1 = choose_for(var1)
chosen1.execute()
chosen2 = choose_for(var2)
chosen2.execute()
chosen3 = choose_for(var3)
chosen3.execute()
########################################
var3.close()
它给出以下输出:
This object will be executed by : <bound method choose_for.func1 of <__main__.choose_for object at 0x0000020A150A3088>>
Because it is for STRING like
This object will be executed by : <bound method choose_for.func2 of <__main__.choose_for object at 0x0000020A1509EFC8>>
Because it is for PATH like
This object will be executed by : <bound method choose_for.func3 of <__main__.choose_for object at 0x0000020A15276B48>>
Because it is for FILE_POINTER like
还有什么技术术语,我想在这里做什么?我认为这可能与单调度、函数重载或多态性有关,但我不确定。