Dict of variables less verbose

Hi,
why’s there no a native option in py to declare shortly a dict of variables with the name as key.
So
for example, instead of doing this

a = 1
dict(a=a,b=2)

have the option to do something like

a=1
dict(a:=,b=2)

'Cause for me the implicit/explicit argument doesn’t apply; doing a=a seems just verbose.