Help with function prototype

[Nadav Chernin]

Hi, all

 

In past I asked about module - inspect, that can't to get me prototype
of C-implemented functions ( usually all built-in functions ).

 

But, still I see that all Python Editors ( IDLE for example ) can to
show prototype of built-in functions - by tooltip. When you print for
example: sum(, you see what kind of parameters you must to enter.

 

So, how IDLE know it?

 

Thanks, Nadav

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