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Is it possible to add a static typing in a class?

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[开发(python) 所属分类 开发(python) | 发布者 店小二05 | 时间 2018 | 作者 红领巾 ] 0人收藏点击收藏

I am trying to make it so that when i am setting a variable, I get a compile-type error when I misspell it. in all my attempts so far, the variable just gets created.

I don't mind to put the variables in a class, a module, a dictionary or any combination. I just want to have a compile time error on misspeling

here is an example:

class Foo: bar="" def __init__(self,bar_value): self.barr=bar_value # want syntax error here the_foo=Foo("hellow")

edit: I had my terminology wrong: I meant static typing

python is strongly typed - the closest you could get using a class is to restrict attribute creation using __slots__ eg:

class Foo(object): __slots__ = ['bar'] def __init__(self, bar_value): self.barr = bar_value the_foo = Foo('bar value') # AttributeError: 'Foo' object has no attribute 'barr'

More info about slots in the Python Data model

TL;DR: This class variable can be assigned a string, iterable, or sequence of strings with variable names used by instances. If defined in a new-style class, __slots__ reserves space for the declared variables and prevents the automatic creation of __dict__ and __weakref__ for each instance.

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