print is giving namespace information?

[TMS]

At least I think thats what it is doing. Here is the code:

class Particle:
    def __init__(self, symbol, charge, number):
        self.symbol = symbol
        self.charge = charge
        self.number = number
class Nuclear:
def __repr__(self):
        return self.symbol
class Nuclear(Particle):
    def __repr__(self):
        return "(%d)%s" % (self.number, self.symbol)
 
if __name__ == '__main__':
    em = Particle("e-", -1, 0)
    print em
 

This is what I get when I run it:
<__main__.Parti cle instance at 0x00C42468> which is the address of where this is located in the namespace I think.

What I'm after is for print em to give me e-

The code was written by the teacher (whom I should be asking, I know) but I want to get an early start on this assignment because when this is figured out I have to write a 'nuclear reactor' program (yipes). So, I'm hoping one of you crazy smart python programmers out there will see what I've done wrong, because I've tried many many things and I can't figure it out. Thank you for your help!

[TMS]

I think I just figured it out... I've defined Nuclear twice.


nvm

[bvdet]

At least I think thats what it is doing. Here is the code:

class Particle:
    def __init__(self, symbol, charge, number):
        self.symbol = symbol
        self.charge = charge
        self.number = number
class Nuclear:
def __repr__(self):
        return self.symbol
class Nuclear(Particle):
    def __repr__(self):
        return "(%d)%s" % (self.number, self.symbol)
 
if __name__ == '__main__':
    em = Particle("e-", -1, 0)
    print em
 

This is what I get when I run it:
<__main__.Parti cle instance at 0x00C42468> which is the address of where this is located in the namespace I think.

What I'm after is for print em to give me e-

The code was written by the teacher (whom I should be asking, I know) but I want to get an early start on this assignment because when this is figured out I have to write a 'nuclear reactor' program (yipes). So, I'm hoping one of you crazy smart python programmers out there will see what I've done wrong, because I've tried many many things and I can't figure it out. Thank you for your help!

TMS,

It looks like you are coming along very well. Let us know if you need some help, or show us some of your stuff when you get further along.

One thing:

if __name__ == '__main__':
    em = Nuclear("e-", -1, 0)
    print em
 

[TMS]

Well... we've been going through Python at breakneck speed. I feel as though my face is in a permanent G6 (you know, pressed back lips, cheeks, hair pulling out the back of my head from the speed), yet I think I'm getting to understand Python a little better each day.

Right now we are building a Nuclear Reactor - Or sort of. The first part works fine. There are 3 more parts of it that I have to accomplish and I'm already stuck!

The first of the 3 parts includs a new class which is created with a left hand side and a right hand side, both specified by tuples containing particles. The reaction will transform the particles on the left hand side to the particles on the right hand side. (lhs = left hand side, rhs = right hand side).

The problem I'm having is I can't get it to print out the way I need it to. I see that the new class inherits from the Particle class and I think it goes like this:

class Nucleus(Particle):
    def __repr__(self):
        return "(%d)%s" % (self.number, self.symbol)
 
class UnbalancedCharge:
    pass #worry about this later
 
class UnbalancedNumber:
    pass #worry about this later
 
class react(Nucleus):     #this is the new class
    def __init__(self, lhs, rhs):
        self.lhs = lhs
        self.rhs = rhs
    def __repr__(self):
        return Nucleus(lhs, lhs), "->" , Nucleus(rhs, rhs) #this can't be right
 

What should happen is when requested to
print react((li6, d), (he4, he4))

it should return this:
(6)Li + (2)H -> (4)He + (4)He

The class Nucleus prints the (6)Li and (2)H as well as the (4)He parts. BUT, when inheriting from that class, I should be able to use the format from Nucleus class to print out the new format right?

Should I use the init from the Nucleus class or do it like I have it? Eventually the lhs will be compared to the rhs to see if they are equal.

I'm hoping for a nudge in the right direction...
TMS

[bvdet]

This will not work, but it may be closer:

class react(Nucleus):     #this is the new class
    def __init__(self, lhs, rhs):
        self.lhs = lhs
        self.rhs = rhs
    def __repr__(self):
        return '%s->%s' % (repr(Nucleus(lhs, lhs)),  repr(Nucleus(rhs, rhs)))    

[TMS]

OK, maybe I'm thinking about this all wrong. Do I really need another __init__? Couldn't I write some functions defining the rhs and lhs? I've been trying some other things, but I can't figure it out. Time to go to a different class.