Are there any list comparison optimizations in Python?
Jonathan P.
jbperez808 at yahoo.com
Mon Nov 12 19:36:32 EST 2001
>>> x=[1,2,3]
>>> y=x
>>> xlist=[x,1,2,3]
>>> ylist=[y,1,2,3]
>>> xlist==ylist
>>> xlist.remove(x) # these 2 statements not executed one after
>>> xlist.remove(y) # the other but representing different cases
>>> ylist.remove(x)
One of Python's most convenient high-level features is automatic list
comparison by value and recursively.
Does it know to optimize the compare if it has already been determined
that two items share a reference to the same object by not doing a
value compare on them anymore?
And will this apply to both the comparison and remove() calls above?
More information about the Python-list
mailing list