Seymore4Head <Seymore4Head@Hotmail.invalid> writes: > I am trying to learn classes. > I am currently using Python 2.7 at the command line.
(I think you mean “the interactive Python interpreter”, or just “the Python shell”.) Since you are learning Python, I will strongly recommend you ignore Python 2 unless it becomes unavoidable. Instead, learn Python 3 primarily; it is much better because it omits a bunch of legacy behaviour you don't need. > If you try to type commands at the [interactive shell] and make the > slightest mistake you have to start over. Right. There is line-by-line history, and editing enabled with the “readline” plug-in. (This is an advantage of using a programmer-friendly operating system, which MS Windows sadly is not.) > I was trying to copy and paste these instructions into the > [interactive Python shell]. > > http://en.wikibooks.org/wiki/Python_Programming/Classes > >>> class Foo: > ... def setx(self, x): > ... self.x = x > ... def bar(self): > ... print self.x > > There is really no way to do that without pasting line by line is > there and adding deleting spaces? And if you use spaces and tabs, > they are not the same. Right on all counts. The interactive Python shell is good for very quickly experimenting and demonstrating how Python actually behaves, statement by statement. But as you point out, it is not a good choice for anything more complex. It is a good learning and debugging tool. When you start to write larger units of code, like a class or a function, you can trade immediacy for flexibility: write your code into a text editor, save it to a file ‘foo.py’, then run that code at a separate OS command prompt by invoking ‘python foo.py’ in the terminal. That way, you can continue to adjust and tweak the code as you learn how your changes affect the code. You do need to keep invoking the actions separately – edit the file, save the file, run the file with Python – but this is what's needed when you want to run a program more than once anyway, so it's a good step to take. Find a good, *general-purpose* programmer's editor. Preferably licensed under free software terms, with a strong community supporting it, and available on all major platforms for when you switch to a decent programmer-friendly operating system. -- \ “When you go in for a job interview, I think a good thing to | `\ ask is if they ever press charges.” —Jack Handey | _o__) | Ben Finney -- https://mail.python.org/mailman/listinfo/python-list
