a=5
b=6
a=b+=6
The above statements when executed in python show syntax error. Why is it so? Are multiple compound assignments not possible in python?
Is multiple compound assignments possible in python
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The short answer:
No, this is not possible in Python.
The long answer:
This is because Python doesn't support assignment as expression (i.e. assignment in Python does not return a value).
So while you may have been used to this working in C, due to common pitfalls with it, it was never a part of the Python language
...until last year when Python 3.8 introduced the Walrus operator (see docs here: https://docs.python.org/3/whatsnew/3.8.html).
However, even with this operator, the closest you can do is:
a = (b := 6)- i.e. without the increment.