Re: [Python-Dev] Adding any() and all()

[Phillip J. Eby]

At 06:38 PM 3/10/05 -0800, Bill Janssen wrote:
Guido,
I think there should be a PEP.  For instance, I think I'd want them to be:
def any(S):
  for x in S:
    if x:
      return x
  return S[-1]
def all(S):
  for x in S:
    if not x:
      return x
  return S[-1]
Or perhaps these should be called "first" and "last".
More precisely (since "S" might be an iterator, or empty):
def any(S):
    x = False
    for x in S:
        if x: break
    return x
def all(S):
    x = True
    for x in S:
        if not x: break
    return x
However, "first" and "last" don't make sense to me as names.  First 
what?   Last what?  Actually, "any" and "all" don't make that much sense to 
me either.  I find myself wanting to call them "or" and "and", or maybe 
"or_iter" and "and_iter".  Or perhaps "until_false" or "until_true".  Nah, 
the and/or names make more sense, as they exactly match the behavior of the 
corresponding logical operators, if you could call them as a function.  At 
least, if they took *args anyway.

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