builtin functions for and and or?

[Michael Hartl]

I warmly recommend downloading Peter Norvig's Python utilities file
(http://aima.cs.berkeley.edu/python/utils.py) and putting it on your
Python path.  (E.g., in bash, put a line like

export PYTHONPATH="/path/to/utilities_directory"

in your .bashrc file.)  The utils.py file defines many useful
functions, including the ones you want:

# def every(predicate, seq):
#     """True if every element of seq satisfies predicate.
#     Ex: every(callable, [min, max]) ==> 1; every(callable, [min, 3])
==> 0
#     """
#     for x in seq:
#         if not predicate(x): return False
#     return True
#
# def some(predicate, seq):
#     """If some element x of seq satisfies predicate(x), return
predicate(x).
#     Ex: some(callable, [min, 3]) ==> 1; some(callable, [2, 3]) ==> 0
#     """
#     for x in seq:
#         px = predicate(x)
#         if px: return px
#     return False

Michael

--
Michael D. Hartl, Ph.D.
Chief Technology Officer
http://quarksports.com/