Move getmethparlist function from turtle to inspect module

Feature or enhancement

Proposal:

The getmethpartlist turtle module function does work which seems to be supposed to be done by the inspect module.

In fact, getmethpartlist calls inspect.signature and then iterates over it to produce a call to the callable. Perhaps this second part could also be implemented in the inspect module.

In an issue, @terryjreedy said, “For calls that just want the call signature, I wonder if calling getmethodparlist could be replaced by calling signature.”

So, my suggestion is to add two new methods to Signature class, which:

1. Returns the call:

class Signature():
    def as_call(self) -> string : ...

2. Returns a new Signature without the first parameter if ob is a method:

class Signature():
    def as_function(self): ...

Then, getmethpartlist could be:

def getmethpartlist(ob):
    defs = inspect.signature(ob).as_function()
    call = defs.as_call()
   return str(defs), call

Thoughts?

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

https://discuss.python.org/t/move-getmethparlist-function-from-turtle-to-inspect-module/97172

先檢視 Lib/turtle.py 中的 getmethpartlist 以及現有的 inspect.Signature API。閱讀連結的討論和先前的 issue 留言，以判斷呼叫產生和方法參數處理是否應歸屬於 inspect。在能夠確定實作範圍之前，必須先對 API 和行為達成共識，才算完成。