Inconsistency in dictionary behaviour: dict(dict) not calling__setitem__

[Terry Reedy]

"Almad" <bugs at almad.net> wrote in message 
news:1165948261.745137.88540 at j72g2000cwa.googlegroups.com...
> Hello,
>
> I discovered this behaviour in dictionary which I find confusing
...
> However, when constructing dictionary with dictionary in constructor
> like d = RegisterMap({'k':'v'}), __setitem__ is not called,

d.__setitem__(k,v) is the internal translation of d[k] = v (when such is 
explicitly written in this code).  d.__init__(otherdict) need not go thru 
that interface if a more direct means is available.

>so workaround is needed:

Your 'workaround' seems to be the proper solution.

> Am I doing something wrong

Denigrating a solution because it does not meet your expectation.

Your are not the first to do this ;-).

tjr