[Python-Dev] Why is nb_inplace_power ternary? (original) (raw)

Jim Jewett jimjjewett at gmail.com
Fri Feb 9 16:42:22 CET 2007


Greg Ewing schrieb:

Might we want to add an in-place version of the 3-arg pow() function one day? If so, leaving the third argument there could be useful.

"Martin v. Löwis" martin at v.loewis.de replied:

What could the syntax for that be?

Instead of writing

x = pow(x, n, 10)

Either

x**= n % 10 # The **= changes the parse context, so that % is no longer # immediately evaluated or

x**= (n, 10) # exponentiation to a tuple isn't currently defined, and it # does show that both arguments are part of the power # expression -- but I'm not sure it needs a 3-argument form # instead of just unpacking the tuple itself.

-jJ



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