python - Ensuring minimum distance between choices -

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#!/usr/bin/env python # -*- coding: utf-8 -*-  import random, collections, time, os  # pseudo-randomly select element table  # ensuring minimum distance before same # element selected again  def choice_gen(choices, min_dist):     last_choices = collections.deque()     while 1:         choices = set(choices)         c = random.choice(list(choices - set(last_choices)))         new_min = int(len(choices)*6/10)         if min_dist == new_min:             last_choices.pop()         min_dist=new_min         last_choices.append(c)         choices = yield c

i've kind of edited generator, minimum distance follows proportion:

len(choices):min_dist = 10:6

when value given result of proportion new_min int(len(choices)*6/10) changes, deque goes increase in size of 1 element not popping. then, until new_min changes again, keeps popping, ensuring constant size of deque. @ least, that's should do. implementation right?

#!/usr/bin/env python # -*- coding: utf-8 -*-  import random, collections  # pseudo-randomly select element table  # ensuring minimum distance before same # element selected again  def choice_gen(choices, min_dist):     last_choices = collections.deque()     choices = set(choices)     while 1:         c = random.choice(list(choices))         choices.remove(c)         last_choices.append(c)         if len(last_choices) == min_dist:             choices.add(last_choices.popleft())         yield c

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