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
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