Python interview questions: List expressions

[Process () forItem1inchIterable1ifCondition1 forItem2inchIterable2ifCondition2 for Item3inchIterable3ifCondition3] equivalent to: Res= [] forItem1inchIterable1:ifCondition1: forItem2inchIterable2:ifCondition2: forItem3inchIterable3:ifCondition3:res.append (Process ())returnRes

>>> L = [18,'ABC', 20,'Yliu','Liu']>>> [[S.lower (), S.upper ()] forSinchLifisinstance (S, str)] [['ABC','ABC'], ['Yliu','Yliu'], ['Liu','LIU']]>>>Res=[] forSinchL:ifisinstance (S, str): A=[S.lower (), S.upper ()] Res.append (A) Return Res

if Else  for inch  = in L:    ifelse -x    res.append (A) Return Res 

Python interview questions: List expressions