55 def determine_move(history, stats, diffs, memfree):  argument
88     for sid, slab in diffs.items():
152         slab = diffs[youngest[0]]
177     diffs = {}
199         diffs[slabid] = slab
200     return (diffs, totals)
246 def show_detail(diffs, totals):  argument
251     for sid, slab in diffs.items():
261 def memfree_check(s, diffs, totals):  argument
264     for sid, slab in diffs.items():
294                 (diffs, totals) = diff_stats(stats_pre, stats_post)
299                         memfree = memfree_check(s, diffs, totals)
302                     decision = determine_move(history, stats, diffs, memfree)