Question

如何在python中执行类似的操作

Mainstring:
     Sub1
     Sub2
     Sub3

然后通过定义Mainstring StringNumberOne来调用每个值和

StringNumberOne.Sub1 = ""

Answer 1

还有一个名为元组的方法：

from collections import namedtuple

Mainstring = namedtuple('Mainstring', 'sub1 sub2 sub3')

example = Mainstring("a", "b", "c")
print example.sub1  # "a"

Answer 2

我不确定我是否理解你的问题。你可以拥有这样的课程：

class ManySubs(object): # explicit inheritance not needed in 3.x
    def __init__(self, *subs):
        self._subs = subs
        # add sub1..subN fields, but only because you asked for it
        # I think a dynamic fields are an especially bad idea
        # plus, about everytime you have x1..xN, you actually want an array/list
        for i in range(len(subs)):
            setattr(self, 'sub'+str(i+1), subs[i])

    # wrapping code for sequencemethods (__len__, __getitem__, etc)

    def __str__(self):
        return ''.join(self._subs)

Answer 3

首先定义一个类MainString。在__init__方法（构造函数）中，您创建实例变量（Sub1等）：

class MainString(object):
    def __init__(self):
        self.Sub1 = ""
        self.Sub2 = ""
        self.Sub3 = ""

然后您创建该类的实例。您可以更改该实例的实例变量的值：

StringNumberOne = MainString()
StringNumberOne.Sub1 = "hello"

带子类型的变量（Struct？）Python

3 个答案: