Abit shift is a procedure whereby the bits in a bit string are moved to the left or to the right. for example, we can shift the bits in the string 1011 two places to the left to produce the string 1110. note that the leftmost two bits are wrapped around to the right side of the string in this operation. define two scripts, shiftleft. py and shiftright. py, that expect a bit string as an input. the script shiftleft shifts the bits in its input one place to the left, wrapping the leftmost bit to the rightmost position. the script shiftright performs the inverse operation. each script prints the resulting string.

7.23 main lab 7 - online shopping cart background this main lab extends the earlier prep lab "online shopping cart part 1". (you should save this as a separate project from the earlier prep lab). you will create an on-line shopping cart like you might use for your on-line purchases. the goal is to become comfortable with setting up classes and using objects. requirements this lab can be done individually or as pair programming. expanded itemtopurchase class (15 points) extend the itemtopurchase class as follows. we will not do unit testing in this lab so we will not be giving you the names of the member functions. create good ones on your own. create a parameterized constructor to assign item name, item description, item price, and item quantity (default values of "none" for name and description, and 0 for price and quantity). additional public member functions set an item description get an item description print the cost of an item - outputs the item name followed by the quantity, price, and subtotal (see example) print the description of an item - outputs the item name and description (see example) additional private data members a string for the description of the item. example output of the function which prints the cost of an item: bottled water 10 @ $1.50 = $15.00 example output of the function which prints the item description: