python - 根据 PEP8 : uppercase or lowercase? 的常量类属性样式

Question

我真的很喜欢遵循标准编码风格，但找不到答案。

class Card:
    """Card class representing a playing card."""
    RANKS = (None, 'Ace', '2', '3', '4', '5', '6', '7', '8', '9', '10',
             'Jack', 'Queen', 'King')
    SUITS = ('Clubs', 'Spades', 'Diamonds', 'Hearts')

    def __init__(self, rank, suit):
        self.rank = rank
        self.suit = suit

    def __str__(self):
        return f"{Card.RANKS[self.rank]} of {Card.SUITS[self.suit]}"


c = Card(1, 1)
print(c)

我应该在类属性中写常量 all_lower_case 还是 ALL_UPPER_CASE？PEP8 只是说常量在模块级别应该是 ALL_UPPER_CASE。类(class)呢？

Answer 1

PEP8明确指出常量应该是大写的:

Constants

Constants are usually defined on a module level and written in all capital letters with underscores separating words. Examples include MAX_OVERFLOW and TOTAL.

请注意，它只是说这些通常是在模块级别上定义的。但是，如果您的值应被视为常量，那么将它们设为大写 ​​- 即使它们是在类级别上定义的。