message: Update random-pick-index.py
diff: @@ -43,7 +43,7 @@ class Solution(object):
  for i in xrange(len(self.__nums)):
  if self.__nums[i] != target:
  continue
  - reservoir = i if n == 0 or randint(1, n+1) == 1 else reservoir
  + reservoir = i if randint(1, n+1) == 1 else reservoir
  n += 1
  return reservoir
  