import collections
from math import log10
import itertools
+import sys
+sys.setrecursionlimit(1000000)
def memo(f):
"Memoize function f."
"""
return -log10((N * 10**(len(key) - 2)))
-# N = 1024908267229 ## Number of tokens
-
Pw = Pdist(datafile('count_1w.txt'), avoid_long_words)