带有变量的Python字符串

Question

我正在尝试做这样的事情：

class SomeEnum(str, Enum):
    STRING_A = 'This is a string A with variable ' + variable
    STRING_B = 'This is a string B with variable ' + variable

例如，将其像模板一样使用：

some_list.append(SomeEnum.STRING_A(variable))

这是否可以在枚举中进行，因为它违反了枚举的目的？还是您还建议枚举什么？多谢！

Answer 1

我会说定义A __调用__方法以及一些字符串格式化

class SomeEnum(str, Enum):
    STRING_A = 'This is a string A with variable %s %s '
    STRING_B = 'This is a string B with variable %s %s'

    def __call__(self, *args):
        return self % args

print(SomeEnum.STRING_A("a", "b"))  # This is a string A with variable a b
print(SomeEnum.STRING_B("c", "d"))  # This is a string B with variable c d

唯一规则：提供相同数量的paramater，因为字符串期望

---

动态格式

class SomeEnum(str, Enum):
    STRING_A = 'This is a string A with variable '
    STRING_B = 'This is a string B with variable '

    def __call__(self, *args):
        if len(args) == 1:
            return self + args[0]
        return self + ', '.join(args[:-1]) + " and " + args[-1]


print(SomeEnum.STRING_A("a"))            # This is a string A with variable a
print(SomeEnum.STRING_B("a", "b"))       # This is a string B with variable a and b
print(SomeEnum.STRING_B("a", "b", "c"))  # This is a string B with variable a, b and c

Answer 2

不！。你不能那样做。这是不切实际的。您正在编写的代码看不到Intellisense。如果您想在公共场合看到它，则可以使用self。

class SomeEnum:

    def __init__(self, enum):
        self.Enum = enum
        self.STRING_A = f'This is a string A with variable {enum}'
        self.STRING_B = f'This is a string B with variable {enum}'


num = 6

p1 = SomeEnum(num)

print(p1.STRING_A)
print(p1.STRING_B)