在 2022年9月1日星期四 UTC+2 18:16:03，<Chris Angelico> 写道： > On Fri, 2 Sept 2022 at 02:10, James Tsai <james...@gmail.com> wrote: > > > > Hello, > > > > I find it very useful if I am allowed to define new local variables in a > > list comprehension. For example, I wish to have something like > > [(x, y) for x in range(10) for y := x ** 2 if x + y < 80], or > > [(x, y) for x in range(10) with y := x ** 2 if x + y < 80]. > > > > For now this functionality can be achieved by writing > > [(x, y) for x in range(10) for y in [x ** 2] if x + y < 80]. > > > > Is it worthwhile to add a new feature like this in Python? If so, how can I > > propose this to PEP? > Not everything has to be a one-liner. > > ChrisA
No but very often when I have written a neat list/dict/set comprehension, I find it very necessary to define local variable(s) to make it more clear and concise. Otherwise I have to break it down to several incrementally indented lines of for loops, if statements, and variable assignments, which I think look less nice. -- https://mail.python.org/mailman/listinfo/python-list
