Status of PEP's?
Samuele Pedroni
pedronis at bluewin.ch
Wed Feb 27 20:47:35 EST 2002
Maybe this is a useful insight:
in mathematetics it is not uncommon to
identify the natural numbers with the set
of their predecessors
0 = {}
1 = {0} = {{}}
2 = {0, 1} {{},{{}}}
etc
e.g. in the notation for power-sets
powerset(X) = 2^X where 2 stands for
the set {0,1}
so having
for i in 5
iterating over 0,1,2,3,4
is natural in mathematical sense
(which does not mean automatically that it is newbie friendly <wink>)
because 5 as an ordered set is the sequence (0,1,2,3,4)
so also the notation 1 in 5 is natural.
regards, Samuele Pedroni.
More information about the Python-list
mailing list