Compute their Cartesian product, AxB of two lists. Each list has no more than 10 numbers. For example, given the two input lists:
A = [1,2]
B = [3,4]

then the Cartesian product output should be:
AxB = [(1,3),(1,4),(2,3),(2,4)]

The program written in Python is as follows: (See Attachments for source file and output)

def cartesian(AB):

     if not AB:

           yield ()

     else:

           for newlist in AB[0]:

                 for product in cartesian(AB[1:]):

                       yield (newlist,)+product  

A = []

B = []

alist = int(input("Number of items in list A (10 max): "))

while(alist>10):

     alist = int(input("Number of items in list A (10 max): "))

blist = int(input("Number of items in list B (10 max): "))

while(blist>10):

     blist = int(input("Number of items in list B (10 max): "))

print("Input for List A")

for i in range(alist):

     userinput = int(input(": "))

     A.append(userinput)

print("Input for List B")  

for i in range(blist):

     userinput = int(input(": "))

     B.append(userinput)  

print(list(cartesian([A,B])))

Explanation:

The function to print the Cartesian product is defined here

def cartesian(AB):

This following if condition returns the function while without destroying lists A and B

    if not AB:

         yield ()

If otherwise

    else:

The following iteration generates and prints the Cartesian products

         for newlist in AB[0]:

              for product in cartesian(AB[1:]):

                   yield (newlist,)+product

The main method starts here

The next two lines creates two empty lists A and B

A = []

B = []

The next line prompts user for length of list A

alist = int(input("Number of items in list A (10 max): "))

The following iteration ensures that length of list A is no more than 10

while(alist>10):

    alist = int(input("Number of items in list A (10 max): "))

The next line prompts user for length of list B

blist = int(input("Number of items in list B (10 max): "))

The following iteration ensures that length of list B is no more than 10

while(blist>10):

    blist = int(input("Number of items in list B (10 max): "))

The next 4 lines prompts user for input and gets the input for List A

print("Input for List A")

for i in range(alist):

    userinput = int(input(": "))

    A.append(userinput)

The next 4 lines prompts user for input and gets the input for List B

print("Input for List B")  

for i in range(blist):

    userinput = int(input(": "))

    B.append(userinput)

This line calls the function to print the Cartesian product

print(list(cartesian([A,B])))

this seems to be in the wrong category. but i'll take some free points my dude

posting this in wrong category will result in people seeing it who won't know the answer.