ringbuffer exercise #1

#! /usr/bin/env python3
#-*- coding: utf-8 -*-

""" This is a test script.
"""

# #################  class definition  ######################################

class ringBuf:
    def __init__(self, items):
        self.maxItems = items
        self.items = 0
        self.newItems = 0
        self.ringData = [0 for i in range (items)]
        self.readP = 0
        self.writeP = 0

    def readItem(self):
        if self.newItems == 0:
            raise StopIteration
        else:
            thisItem = self.ringData[self.readP]
            self.newItems -= 1
            self.readP = (self.readP + 1) % self.maxItems
            return thisItem

    def writeItem(self, item):
        self.ringData[self.writeP] = item
        self.writeP = (self.writeP + 1) % self.maxItems
        if self.newItems < self.maxItems:
            self.newItems += 1
        else:
            self.readP = (self.readP + 1) % self.maxItems
        if self.items < self.maxItems:
            self.items += 1

    def getList(self):
        thisList = [self.ringData[self.writeP]]
        thisList.clear()
        thisReadP = (self.maxItems + self.writeP - self.items) % self.maxItems
        for i in range(self.items):
            thisList.append(self.ringData[thisReadP])
            thisReadP = (thisReadP + 1) % self.maxItems
        return thisList

    def readPos(self):
        return self.readP

    def writePos(self):
        return self.writeP

    def itemCount(self):
        return self.items

    def maxItems(self):
        return self.maxItems

    def newItems(self):
        return self.newItems


# #################  here comes the main code  ##############################

ringInst = ringBuf(7)

while True:
    for i in range(3):
        print(str(i + 1) + ". Ganzzahl: ", end = "")
        number = int(input())
        ringInst.writeItem(number)
    print("Whole ring listed: ", str(ringInst.getList()))