Why True/False is capitalized in Python?

Question

All members are camel case, right? Why True/False but not true/false, which is more relaxed?

Answer 1

From Pep 285 :

Should the constants be called 'True' and 'False' (similar to None) or 'true' and 'false' (as in C++, Java and C99)?

=> True and False.

Most reviewers agree that consistency within Python is more important than consistency with other languages.

This, as Andrew points out, is probably because all (most)? built-in constants are capitalized .

Answer 2

所有 python 的内置常量都大写或 [upper] CamelCase：

Answer 3

Here's a possible explaination :

I see that naming conventions are such that classes usually get named CamelCase. So why are the built-in types named all lowercase (like list, dict, set, bool, etc.)?

Because most of them originally were types and factory functions, not
classes - and a naming convention is not a strong reason to make backwards incompatible changes. A different example: the new builtin type set is based on (altough not exactly equal to) the Set class from the sets module

Answer 4

In python only the 3 keywords True ,False and None are started with capital letters. I think This is to differentiate these 3 keywords from others. These 3 keywords can be used as literals or values where as other keywords not. For example

a=True is correct but a=for is wrong