Question

Write a python function alt which takes a list of strings myList as a parameter. alt then returns two strings s1 and s2 as a tuple (s1, s2). Here s1 is the concatenation of the strings in myList in even index positions, and s2 is the concatenation of the strings in myList in odd index positions. (List starts at index 0) For example, if

myList = [‘My’, ‘kingdom’, ‘for’, ‘a’ , ‘horse’],

then s1 = ‘Myforhorse’ and s2 = ‘kingdoma’.

Answer 1

Python Function:

def alt(myList):
   """
       Python function that takes a list of strings and returns a tuple consisting of two strings
       String s1: is the concatenation of the strings in myList in even index positions
       String s2: is the concatenation of the strings in myList in odd index positions.
   """
   # Finding length of the list
   listSize = len(myList);
  
   # Initializing two strings s1, s2 to 0
   s1 = "";
   s2 = "";
  
   # Iterating over list elements
   for i in range(0, listSize):
       # Joining Strings at even index position
       if i%2 == 0:
           s1 += myList[i];
       # Joining Strings at odd index position
       else:
           s2 += myList[i];
          
   # Returning two strings placed in a tuple      
   return (s1, s2);
  
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Sample Output:

Python 3.5.2 Shell File Edit Shel Debug Options Window Help >def alt (myList): Python function that takes a list of strings and returns a tuple consisting of two strings String sl: is the concatenation of the strings in myList in even index positions String s2 is the concatenation of the strings in myList in odd index positions # Finding length of the list listSizelen (myList) # Initializing two strings s1, s2 to 0 # Iterating over list elements Eor i in range (0, listSize) # Joining Strings at even index position s1 += myList [1]; # Joining Strings at odd index position else: s2 +=myList [i]; # Returning two strings placed in a tuple return (sl, s2) 377 >>>myList= ['My', 'kingdom ' , 'for ' , 'a' 'horse ' ] , >alt (myList) ('Myforhorse','kingdoma 73 377