Circular array indices in Python

Question

I\'m looking to get an array (or matrix) that is circular, such that

Let:

 a = [1,2,3]

Then I would like

a[0] = 1
a         


        

Answer 1

Having such functionality is not good for your code. Instead write a generator function which generates you round robin values.

numbers = [1, 2, 3]

def returnNumber():
    """
    A circular array for yielding list members repeatedly 
    """
    index = -1
    while True:
        index += 1
        yield slangWords[index % len(numbers)]

# Now you can use this generator
numberGenerator = returnNumber()
numberGenerator.next() # returns 1 
numberGenerator.next() # returns 2
numberGenerator.next() # returns 3
numberGenerator.next() # returns 1
numberGenerator.next() # returns 2