Interpreting Left to right?

[Chetan Harjani]

x=y="some string"
And we know that python interprets from left to right. so why it doesnt
raise a name error here saying name 'y' is not defined?

another example:
(1,2) + 3,
here, python raises a  TypeError "can only concatenate tuple(not int) to
tuple" but we know (3,) is a tuple as seen by following:
t=3,
type(t)
<type 'tuple'>
Arent both of this contradicting?

-- 
Chetan H Harjani
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