On Wed, Jun 2, 2021 at 1:17 PM Julia Schmidt <accountearnstar@gmail.com> wrote:
From https://docs.python.org/3.10/whatsnew/3.10.html:
def http_error(status): match status: case 400: return "Bad request" case 404: return "Not found" case 418: return "I'm a teapot" case _: return "Something's wrong with the Internet"
The wildcard idea looks just wrong and confusing. What if I want to use it as a variable and match against it like _ = 504? This is how it should be done:
def http_error(status): _ = 504 match status: case 400: return "Bad request" case 404: return "Not found" case 418: return "I'm a teapot" case _: return "Gateway Timeout" else: return "Something's wrong with the Internet"
What you're suggesting wouldn't work anyway. The underscore is only very minorly special in a match statement. *Any* simple name will function as a catch-all; the only thing that's special about the underscore is that it won't bind to that name. match status: case 400: ... case 404: ... case 418: ... case other: return "HTTP error %d" % other The same is true inside any sort of nested match. You can "case [x, y]:" and it'll take any two values and bind to x and y, or you can "case [x, _]:" to take any two values, bind the first to x, and ignore the second. To match against non-constants, normally you'd want to use an enumeration or somesuch. You can read more about pattern matching in PEP 636: https://www.python.org/dev/peps/pep-0636/ ChrisA