+- Python Forum (https://python-forum.io)
+-- Forum: General (https://python-forum.io/forum-1.html)
+--- Forum: News and Discussions (https://python-forum.io/forum-31.html)
+--- Thread: Is that possible to have a new feature: dynamic return with using function argument (/thread-20695.html)
Is that possible to have a new feature: dynamic return with using function argument - kouui - Aug-26-2019
In python 3.8, we will have a new syntax
:= that could assign values to variables as part of larger expression, for example,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 = 3Is that possible to have this new feature in new python version?
RE: Is that possible to have a new feature: dynamic return with using function argument - ThomasL - Aug-26-2019
I don´t know, as this is not our decision to make.
If you think this would be a nice feature in future python you can propose this
to Python developers https://www.python.org/dev/peps/
If your idea is good they will think about it.
RE: Is that possible to have a new feature: dynamic return with using function argument - kouui - Aug-26-2019
@ThomasL
Thanks a lot. I will post my proposal to PEPs.