[Tutor] Re: c to python

[Alan Gauld]

> What if we have a statement like
> 
> #define ABC 0x0001            in my c struct.

First thing to remember is that #define is really an 
instruction to the C preprocessor to textually 
substitute 0x0001 everytime you type ABC in a source 
file. Its not really a language issue.

In particular since ANSI C introduced the const statement
these kind of #defines should be considered deprecated.

So looking at the issue of how we would represent

const int ABC=0x0001;

in Python, the most common technique is simply to define
a variable:

ABC = 0x0001

or just

ABC = 1

Then use it as usual (The uppercase name is just a convention 
originating in C's similar convention for #defines)

In a bigger program you might like to put all such constants 
in a module, in which case you can then do:

import consts

print consts.ABC

> I m following like this in python.
> 
> class AB:
>       def __init__(self):
>                 self.a = None
>                 self.b = None
>                 #statement here ?

Or yes, you could put the constants in a class.
Inwhich case you just add a line 

                   self.ABC = 1

And access it as:

ab = AB()
print ab.ABC

HTH,

Alan G.