Dear Python community, I am a heavy python user in numerical simulation.
In python 3.8, we will have a new syntax `:=` that could assign values to variables as part of larger expression like, ``` if (n:=len(a)) > 10: .... ``` On the other hand, I also think that it would be useful if `:=` could be used in function argument, so that a local variable created inside a function could be returned **optionally**, for example, ``` def func(arg1, arg2, karg1=karg1_default, karg_return:=karg_return): ... karg_return = 3 ... return func_output # normal calling of func() without returning variable karg_return # in this way, karg_return:=karg_return is not used and karg_return is only simply a local variable in func() output = func(2,3,karg1=4) # calling func() with using the karg_return argument # in this way, value of the local variable karg_return in func() is created and "passed" to variable a output = func(2,3,karg1=4,a:=karg_return) print(a) # a = 3 ``` Is it possible to add this new feature? Thanks for your attention to this matter. Huang Y.W.
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