nums = [5, 4, 7, 6, 8, 1, 3]
nums.pop()
Out[3]: 3

print nums
[5, 4, 7, 6, 8, 1]

returnValue = nums.pop()
print returnValue
1

print nums
[5, 4, 7, 6, 8]

nums = [8, 3, 5, 4, 1]
evennums = [v*v for v in nums]
print nums
[8, 3, 5, 4, 1]

print evennums
[64, 9, 25, 16, 1]

[v for v in nums]
Out[12]: [8, 3, 5, 4, 1]

a = [v for v in nums]
print a
[8, 3, 5, 4, 1]

print nums
[8, 3, 5, 4, 1]

a = [2 for v in nums]
print a
[2 2 2 2 2]
a = [v*2 for v in nums]
print a
[16, 6, 10, 8, 2]

[j+1 for j in range(20) if (j%3) == 0]
Out[21]: [1, 4, 7, 10, 13, 16, 19]

[i*2 for i in [j+1 for j in range(20) 
             if (j%3) == 0] if i*i > 19]

Out[22]: [14, 20, 26, 32, 38]