Lesson 5.6 · Trace it

Trace: list changes

Python code4 rows to fill4 marks

Complete the trace table for this Python code. append adds a value at the end. pop(1) removes the value at index 1 and gives it back. [4]

Line 1: nums = [5, 3, 8]1nums = [5, 3, 8]
Line 2: nums[0] = 62nums[0] = 6
Line 3: nums.append(4)3nums.append(4)
Line 4: x = nums.pop(1)4x = nums.pop(1)
Line 5: y = nums[1]5y = nums[1]
Line 6: n = len(nums)6n = len(nums)
Line 7: print(x + y + n)7print(x + y + n)

Fill in one row each time a line changes x, y or n, or prints something. The table already has the right number of rows. In each row, write only what that line changes; you can leave the other cells empty or copy their values down. Write values the way Python shows them: 3 and 3.0 are different, and text goes in quotes. In the output column, write exactly what appears on screen, with no quotes around it.

Row	x	y	n	output
1
2
3
4