  
          print('Test: Push on a capacity stack to create a new one')
          stacks.push('a')
  
          print('Test: Pop on a one element stack to destroy it')
          assert_equal(stacks.pop(), 'a')
  
          print('Test: Pop general case')
          assert_equal(stacks.pop(), 5)
          assert_equal(stacks.pop(), 3)
 
</s> remove     "        print('Test: Pop on a one element stack to destroy it')\n",
 </s> add     "        print('Test: Pop on a stack to destroy it')\n", </s> remove       "Test: Pop on a one element stack to destroy it\n",
 </s> add       "Test: Pop on a stack to destroy it\n", </s> remove     "* Pop on a one element stack to destroy it"
 </s> add     "* Pop on a stack to destroy it" </s> remove         capacity = 2
        stacks = SetOfStacks(capacity)
 </s> add         stacks = SetOfStacks(capacity=2) </s> remove     "        capacity = 2\n",
    "        stacks = SetOfStacks(capacity)\n",
 </s> add     "        stacks = SetOfStacks(capacity=2)\n",
        print('Test: Pop on a stack to destroy it')
  
          print('Test: Push on a capacity stack to create a new one')
          stacks.push('a')
  
        print('Test: Pop on a stack to destroy it')
          assert_equal(stacks.pop(), 'a')
  
          print('Test: Pop general case')
          assert_equal(stacks.pop(), 5)
          assert_equal(stacks.pop(), 3)
keep keep keep keep replace keep keep keep keep keep
 Polish set of stacks solution 
stacks_queues/set_of_stacks/test_set_of_stacks.py