On 18/04/2017 01:23, Paul Rubin wrote:
Ben Bacarisse <ben.use...@bsb.me.uk> writes:
c = sys.stdin.read(1)
while c == ' ':
c = sys.stdin.read(1)
c = itertools.dropwhile(
lambda c: c==' ',
iter(lambda: sys.stdin.read(1),None)
).next()
I tried this but it doesn't like the .next.
I wanted to see if it was any faster or slower than the more obvious loop.
(With the original loop, changing:
c=sys.stdin.read(1)
while c==' ':
c=sys.stdin.read(1)
to:
r=sys.stdin.read
c=r(1)
while c==' ':
c=r(1)
made it 75% faster (reading 10M spaces). Those 3 extra lookups per loop
I guess (this was run inside a function otherwise the dynamics are
different).
--
bartc
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