Assign expression / walrus operator is 3.8+ #9820
Description
Current problem
if (x := f()): ... was introduced in Python 3.8.
Desired solution
If py-version < 3.8, flag it.
Additional context
No response
{{ message }}
if (x := f()): ... was introduced in Python 3.8.
If py-version < 3.8, flag it.
No response