any() and all() on empty list?

[Ron Adam]

Steve R. Hastings wrote:

if True in talley(S): do_somthing()

Works for me... ;-)


Cheers,
Ron

Actulley talley isn't needed for this...

if True in S: do_domething()


That's what I get for staying up way too late last night.

Cheers, Ron

 

[Piet van Oostrum]

SRH> vowels = frozenset("aeiouAEIOU")
SRH> f = open("a_file.txt") # note that f is an iterator

SRH> counts = tally(line[0] in vowels for line in f)

tally([line[0] in vowels for line in f])

SRH> # counts is a dict; counts.keys() == [False, True]

No guarantee about the order. It could be [True, False].

SRH> count_nonvowels, count_vowels = counts.values()

So you must use counts[False] and counts[True].