Le Wed, 09 Mar 2005 09:45:41 -0800, Dave Opstad a écrit :Is there a "short-circuit" version of get that doesn't evaluate the second argument if the first is a valid key? For now I'll code around it, but this behavior surprised me a bit...
def scary(): print "scary called" return 22
d = dict(x=1) d.get('x', lambda *a : scary()) # print 1 d.get('z', (lambda *a : scary())()) scary called 22
So you have to change the code at the point of call depending on whether the requested value is in the dict? ;)
If you can get this to work I'm sure we can find other applications for such 'smart code' :-)
Kent -- http://mail.python.org/mailman/listinfo/python-list
