具有子类型（Struct？）Python的变量

在python中如何执行类似的操作

Mainstring:
     Sub1
     Sub2
     Sub3

然后通过定义

主字符串StringNumberOne

及

---

我不确定我是否理解你的问题。您可以有这样一个类：

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)

---

首先定义一个类

MainString

。在

\uuuu init\uuuu

方法（构造函数）中，创建实例变量（

Sub1

等）：

然后创建该类的一个实例。您可以更改该实例的实例变量值：

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

---

还有命名元组方法：

from collections import namedtuple

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

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

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

from collections import namedtuple

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

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