I want to create an efficient circular buffer in python (with the goal of taking averages of the integer values in the buffer).
Is this an efficient way to use a list to collect values?
def add_to_buffer( self, num ):
self.mylist.pop( 0 )
self.mylist.append( num )
What would be more efficient (and why)?
I would use collections.deque
with a maxlen
arg
>>> import collections
>>> d = collections.deque(maxlen=10)
>>> d
deque([], maxlen=10)
>>> for i in xrange(20):
... d.append(i)
...
>>> d
deque([10, 11, 12, 13, 14, 15, 16, 17, 18, 19], maxlen=10)
There is a recipe in the docs for deque
that is similar to what you want. My assertion that it's the most efficient rests entirely on the fact that it's implemented in C by an incredibly skilled crew that is in the habit of cranking out top notch code.