🔒 How to type a type?

[torpid hedge]

So I have a Figure class which has a dict of properties. These properties are defined by Rules which have a name, type, and an optional default value.
Rule types would either be Figure, str, bool, or int. So, a str rule foo applied to a Figure would then let you do Figure.properties["foo"] to get a str back.
So how do I type that property_type argument of the Rule.init method?
I was considering using an enum but I'd like to just use the types directly (unless this is not a good idea, what do you think I should do?)

Thanks

[wind lark]

@torpid hedge

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[stoic marsh]

type[<class name>]

oh wait hold on lemme read the rest of the post

[stoic marsh]

sooo ```py
class Figure:
properties: dict[str, Rule]

type Rule = Figure | str | bool | int

that's correct?

[torpid hedge]

Not quite what I meant

one sec

[stoic marsh]

ok no problem

[torpid hedge]

class Figure:
  properties: dict[str, Figure | str | bool | int]

class Rule:
  name: str
  rule_type: ??? # what do I put here?

test_rule = Rule('test', ???)
test_fig.apply_rule('test', value of type rule_type)
test_fig.properties['test'] # This will be type rule_type

When I prompt the user for the value it would accept a str, an int, a bool, etc.

depending on that rules type

[misty copper]

Maybe Literal?

an enum may help too

!d enum.Enum

[wind lark]

enum.Enum

class enum.Enum```
*Enum* is the base class for all *enum* enumerations.

[torpid hedge]

I was thinking of using an enum but IDK if its the best option

is it what you would do?

[torpid silo]

What is enum

!d enum

[wind lark]

enum

Added in version 3.4.

Source code: Lib/enum.py...

[torpid silo]

Hmm

No description

Sad

[torpid hedge]

https://docs.python.org/3/library/enum.html

theres an example there

they are pretty cool

[torpid silo]

Ty

[stoic marsh]

oh just use type

either rule_type: type OR ```py
type RuleType = Figure | ...

class Rule:
name: str
type: RuleType

[torpid hedge]

I already starting using this

class RuleType(Enum):
    """
    Enum for rule types.
    """
    FIGURE = 1  # Reference to another figure (or a sub-figure)
    STRING = 2  # String value
    INTEGER = 3  # Integer value
    FLOAT = 4  # Float value
    BOOLEAN = 5  # Boolean value


class Rule:
    rule_type: RuleType

Do you think I should switch it? Is that type union more preferable?

[stoic marsh]

depends. i'd probably just use type tbh. lets see what killjoy says tho

[misty copper]

It might be better to use a tagged union or even generics

[stoic marsh]

the type union would probably be either

because you can reuse it in your dict[str, <rule type here>]

[torpid hedge]

okay, thanks a lot!

[stoic marsh]

no problem

!close to close the post

[torpid hedge]

!close

[wind lark]

Python help channel closed with !close

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