[Tutor] Multiples python files
chris.klaitos at gmail.com
Tue Mar 1 09:49:56 CET 2011
Thank you all for answers. Again.
2011/2/28 Alan Gauld <alan.gauld at btinternet.com>
> "Christopher Brookes" <chris.klaitos at gmail.com> wrote
> I don't understand
>> def DisplayAll(cls, herosAll):
>> What is cls ?
> This is one of the advanced techniques I referred to a few days ago.
> Basically the "best"(?) solution to your problem is to store the list of
> characters inside the Character class as what is known as a class variable.
> Then everytime you create a new Character you can add it to the list by
> the init method. And when a character is deleted you remove it via the del
> You can then define class methods to read/print the list, find out how many
> characters exist etc.
> This is much cleaner than keeping a separate global variable since the code
> for managing characters is all in one place with the classs definition. But
> it does introduce a bunch of new syntax features which I didn't think you
> were ready for yet! :-)
> One thing you will need to be very careful about as you go forward is
> namespaces. Remember that everytime you import a module you need to precede
> any names in that module with the module name. And names inside a class need
> to be preceded by the class name. And names inside objects need to be
> preceded by the object (variable) name.
> If the class is inside a module you need to use both module and class. Thus
> if the Character class is defined inside character.py you would have
> something like this in main.py:
> import character
> myObj = character.Character(....)
> print myObj.display()
> print character.Character.displayAll()
> You can simplify it by using the "from m import v" style:
> from character import Character
> myObj = Character(....)
> Alan Gauld
> Author of the Learn to Program web site
> Tutor maillist - Tutor at python.org
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