andmap and ormap
wkehowski at cox.net
wkehowski at cox.net
Tue Mar 14 13:23:55 CET 2006
Hello,
Does python have andmap and ormap:
andmap((lambda t: boolean(t)),L)
gives True if boolean(t) is True for all t in L and False otherwise?
And
ormap((lambda t: boolean(t)),L)
gives True if boolean(t) is True for some t in L and False otherwise?
One can use a list comprehension like
[x for x in L if not(False in map((lambda t: boolean(t)),L))]
as an example of selection by andmap, and
[x for x in L if (True in map((lambda t: boolean(t)),L))]
as an example of selection by ormap.
How does one define andmap/ormap so its first argument is a boolean
procedure or lambda?
def andmap(b,L):
if False in map(b,L): return False
else: return True
def ormap(b,L):
if True in map(b,L): return True
else: return False
Is this good enough?
Walter Kehowski
More information about the Python-list
mailing list