[New-bugs-announce] [issue42610] Get the type of from a var

[dimitri.wei]

New submission from dimitri.wei <dimitri.wei.lingfeng at gmail.com>:

**Feature**
A similar feature in typescript
```ts
const foo: number = 1
type Foo = typeof foo  // type Foo = number

function bar(x: string): void {

}

type Bar = typeof bar // type Bar = (x: string) => void
```

**Pitch**
The expected way in future python.
```py
from typing import Type
foo: int = 1
Foo = Type[foo]  # equivalent to Foo = int

def bar(x: string) -> None :
    ...
Bar = Type[bar]  # equivalent to Bar = Callable[[str], None]
```

----------
components: Demos and Tools
messages: 382792
nosy: wlf100220
priority: normal
severity: normal
status: open
title: Get the type of from a var
type: enhancement
versions: Python 3.10

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue42610>
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