how to build arbitrarily-sized lists in one fell swoop?
Samuel Scarano
srs25 at cornell.edu
Tue Jul 25 10:19:12 EDT 2000
There's a simple thing I want to do in python but I can't find a way that is
obvious to the reader and efficient for the interpreter. I want to make a
list with n copies of x.
This is the way that's most obvious to me:
l = []
for i in range(n):
l.append(x)
But that looks awfully verbose for Python, and I'm sure there's a more
efficient way.
Then there's:
l = map(lambda y: x, range(n))
That's briefer, but it still involves a lot of function calls, and the
wasteful construction of a range.
So what's the right way?
--
Samuel R. Scarano "Due to circumstances beyond my
Cornell University undergraduate control, I am master of my fate
<srs25 at cornell.edu> and captain of my soul."
http://people.cornell.edu/pages/srs25/ -- Ashleigh Brilliant
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