Create a data page display, enter the page number you want to view, display the specified data, 10 data per page

# Write code page display, a for loop, creating 300 data, the data type is not limited, such as: alex-1alex1 @ live.com1, alex -2alex2 @ live.com2, alex-3alex3 @ live.com3, alex- 4alex4 @ live.com4, alex-5alex5 @ live.com5 
page # prompt the user to view (from a start), when the user input designated page number, then display the specified data, 10 data per page, if the user enters page non-decimal numbers, you are prompted to format the content of an error, re-enter

page_roll DEF (): 
    LIS = [] 
    for I in Range (. 1, 301): 
        product_res = 'alex-' + STR (I) + 'Alex' + STR (I) + '@ Live.com' + STR (I ) 
        lis.append (product_res) 
    The page_num = int (len (LIS) / 10) 
    the try: 
        J = int (iNPUT ( 'enter a page:') Strip ()). 
        IF J> 30 J or <. 1: 
            Print ( 'input page is not valid, the display is empty. Please reenter!') 
        elif J> =. 1 and J <= The page_num: 
            page_content_div LIS = [(J -. 1) 10:10 * J * -. 1] 
            Print ( '% of shows a content d:% S '% (J, page_content_div)) 
    the except Exception AS E: 
        Print (' content format error, re-enter, the error is:% S '% E) 


page_roll ()