On Monday, October 27, 2014 8:00:04 AM UTC+5:30, Seymore4Head wrote: > I am trying to learn classes. > I am currently using Python 2.7 at the command line.
Why not idle? And if in general you are at python 3, why 2.7 here? There are enough factor to learn ( and get confused)! Please dont add new ones gratuitously! > If you try to type commands at the command line and make the slightest > mistake you have to start over. > I was trying to copy and paste these instructions into the command > prompt. > > 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. > > http://imgur.com/a/XTkAm Let me repeat and elaborate what I have already told you -- - you should write mostly expressions at the interpreter prompt - you should write definitions in the file Rough distinctions: 1. Things like 1+2, lst.append(3) etc are expressions 2. Things like assignment, if, while are statements 3. class and def statements are special; and called definitions Notes a. theres an inclusion 1 'sits inside' 2 'sits inside' 3 b. Its easiest if you try 1 in the interpreter; 3 in the python file c. 2 is a bit clumsy. Short ones can be tried at the interpreter Longer than 3 (max 4) lines should go into files. May require a bit of thought how to package a statement into a definition to try out d. 2 is clumsy in files for a different reason; you will need to write prints judiciously e. Since def itself goes into class, if youve not yet worked out a comfortable 'tryin-out' model, stay with defs for now In short: For a while people here have been advising you "Use the Interpreter" Now I will add slightly to that: Use the interpreter in idle, along with a python file -- https://mail.python.org/mailman/listinfo/python-list
