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Just a couple very simple "shortcutting" functions that
I find myself needing quite frequently.
"reduce(operator.or_, foo, False)" is all right, but
potentially does a lot more work.
def any(i):
 """Returns true if any element from i is true."""
 for element in i:
 if i:
 return True
 return False
all() would also be nice:
def all(i):
 """Returns true if all elements from i are true."""
 for element in i:
 if not i:
 return False
 return True
..although it /could/ simply be built on any() as "not
any(imap(operator.not_, i))".