On 5 March 2014 12:42, Chris Angelico firstname.lastname@example.org wrote:
On Wed, Mar 5, 2014 at 11:30 PM, Oscar Benjamin
I just though that 3F looks sufficiently distinct from the way it's typically done in C.
3F would be about -16C wouldn't it?
(Not painting any bike sheds when it's that cold, thanks!)
I'm not sure I like the idea of tagging the end of the expression. Currently, the nearest Python has to that is the complex notation:
And that works just fine when considered to be addition:
a=1 b=2j a+b (1+2j)
So really, what Python has is a notation for a j-suffixed float, meaning a complex number with no real part. You can't do that with Fraction:
a=2 b=3F a/b
From a syntactic perspective Python doesn't have syntax for general complex literals. There is only syntax for creating imaginary literals and it is trivial to create a complex number by adding a real and an imaginary one.
3F could create a Fraction with the integer value 3 so that a/b gives a rational number:
from fractions import Fraction as F a = 2 b = F(3) a/b Fraction(2, 3)
I don't understand why you say that can't be done.