Hello Democles!

Where is your sword? ;)
Or was that Damocles?

I think it is a difficult question, how someone learns a programming language.
I (and the Somerville book) would say, there are...

You can use the observer pattern.


class Observed(object):
def register_observer(self,observer):
self.observer=observer
def notify(self):
self.observer.update(self)
...

Well. If you have 10**6 lines with the structure of:
number;number;characters;number

Then, if the 10**6+1 th line contains a data like:
1;2;asd;jkle;3

Then your program will most likely crash.

Well, if you want the hard part...

Coming from a financial background I can assure you, that saving entries into a csv file permanently is a a bad idea. Unless the only purpose for this file is to...

If the input is a "text" file and the replacement values are encoded the same way and has "reasonably" short lines, then the following will suffice.


params={'param1':1, 'param2':2}...

Maybe I was not clear enough.

instead of this:

for disk in alldisks:
distance=mag((vector(pnewx,pnewy))-disk.pos)


use this

Google is your friend.
http://www.google.hu/search?q=wxPySimpleApp(&ie=utf-8&oe=utf-8&aq=t&rls=com.ubuntu:hu-HU:unofficial&client=firefox-a

First url I get:...

You can use subprocess with shell on unix.

http://blog.doughellmann.com/2007/07/pymotw-subprocess.html
And
http://www.python.org/doc/current/lib/module-subprocess.html

Besides, that you do not have a "primary" module in the code...
Eval evaluates an expression in his own namespace and returns the result.
What you really want imho is to inject code.

Something...

Well.
There are two kind of problems in the snippet. Is the algorithm good (gives the right result in a reasonable time), the other is if the program implements this algorithm.

The algo would be...

THe line:

op = input(">")

Takes the input AND evaluates it. That means inputing "1" results in eval("1") which is int("1').
Putting in something like "a" results in the interpreter looking for...