How to complete a task in two seperate 'else' statements while maintaining DRY

Question

What is the best way to implement the following code without having the same code duplicated in two different blocks, but while maintaining efficiency and readability?

if (expression1):
    if (expression2 that can only be checked if expression1):
        doSomething()
    else:
        doSomethingElse()
else:
    doSomethingElse()

Answer 1

if( expression1 and expression2):
 doSomething()
else:
 doSomethingElse()

Since Python supports short-circuit evaluation, Expression2 will only be evaluated if expression1 is true.

Answer 2

I like the AND answer, but you could also use early return.

if exp1 :
    if exp2 :
        doSomething()
        return

doSomethingElse()