为什么“列表"不是 Python 中的保留字? [英] Why isn't 'list' a reserved word in Python?

问题描述

我刚刚发现了一个错误，如果 list 是 Python 中的保留字，该错误本可以避免.(可以肯定的是，我是 Dumbery.)

I just got bit by a bug that would have been prevented if list were a reserved word in Python. (Dumbery on my part, to be sure.)

那么为什么 list(或 dict 或 float 或任何类型)不是保留字?添加解释器错误似乎比尝试记住规则更容易.

So why isn't list (or dict or float or any of the types) a reserved word? It seems easier to add an interpreter error than to try and remember a rule.

(我也知道 Eclipse/PyDev 有一个设置会提醒你这个规则，这很有用.)

(I also know Eclipse/PyDev has a setting that will remind you of this rule, which can be useful.)

推荐答案

Only keywords 保留.

list 不是关键字而是内置类型，str、set、dict 也是、unicode、int、float 等

list is not a keyword but a built-in type, as are str, set, dict, unicode, int, float, etc.

保留每一种可能的内置类型是没有意义的；python 是一种动态语言，如果你想用一个隐藏它的本地名称替换内置类型，你应该可以.

There is no point in reserving each and every possible built-in type; python is a dynamic language and if you want to replace the built-in types with a local name that shadows it, you should be able to.

将 list 和其他类型视为预先导入的对象类型库；您不希望 collections 中的 defaultdict 也被保留吗?

Think of list and the other types as a pre-imported library of object types; you wouldn't expect defaultdict from collections to be reserved either?

使用静态代码分析器 捕捉这样的错误；大多数 IDE 可让您轻松集成其中一个.

Use a static code analyzer to catch errors like these; most IDEs let you integrate one with ease.

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