On Feb 10, 10:26 am, Robert Kern <robert.k...@gmail.com> wrote: > On 2009-02-09 17:10, cptn.spoon wrote: > > > > > On Feb 9, 6:48 pm, "Hendrik van Rooyen"<m...@microcorp.co.za> wrote: > >> "cptn.spoon"<cp......@gmail.com> wrote: > > >> On Feb 9, 3:58 pm, Paul Rubin<http://phr...@nospam.invalid> wrote: > > >>> Thanks Paul! I thought this might be the case. So how would I get the > >>> StockMarket class instance to contain many Stock class instances and > >>> then be able to iterate through them? I'm guessing the basic structure > >>> would be as follows...but I think I'm wrong: > >>> class StockMarket: > >>> pass > >> No. > >> At this level, just use a list of instances of your Stock class. > > >> - Hendrik > > > How do I get a list of instances of a particular class? Is there a way > > to do this dynamically? > > You *can*, but I highly recommend that you don't. Instead, just keep your own > list of instances. When you make a new instance, just append it to the list > (see > below). > > all_stocks = [] > > > Also, what would be the way of dynamically creating an instance of a > > class based on user input (ie a user wants to create a new instance of > > the Stock class via shell input)? > > Define an __init__ method on your class to initialize it from given values. > Use > raw_input() to query the user for information. Convert the text input to > whatever objects your class needs (e.g. if the user entered "10" on the > prompt, > x=raw_input() will return the string '10', so you would do int(x) to get the > integer 10). Now, instantiate your class with the arguments: > > the_stock = Stock(name, risk, initial_price) > > And append it to your list of stocks. > > all_stocks.append(the_stock) > > -- > Robert Kern > > "I have come to believe that the whole world is an enigma, a harmless enigma > that is made terrible by our own mad attempt to interpret it as though it > had > an underlying truth." > -- Umberto Eco
That's exactly what I was after. Thanks Robert! -- http://mail.python.org/mailman/listinfo/python-list
