namespace question

[jm.suresh]

Hi ,

class Test:
a = 1
b = 2
c = 1+2

Now, all a,b and c would be directly visible to the user from the
instance of Test. I am looking for a way to make only c directly
visible from the instance.

 

[Marc 'BlackJack' Rintsch]

In <[email protected]>,

class Test:
a = 1
b = 2
c = 1+2

Now, all a,b and c would be directly visible to the user from the
instance of Test. I am looking for a way to make only c directly
visible from the instance.

Simplest way:

class Test:
c = 3



You know that `a`, `b` and `c` are class variables and not instance
variables!?

Ciao,
Marc 'BlackJack' Rintsch

 

[jm.suresh]

In <[email protected]>,


Simplest way:

class Test:
c = 3




You know that `a`, `b` and `c` are class variables and not instance
variables!?

Yes. I want to have only one class variable called c and a and b are
required as temporary variables to calculate the value for c.

I just found one way:
class Test:
a = 1
b = 2
c = a + b
del a,b

This one works. But I suppose there must be a way to artificially
create a new block of code, some thing like this,

class Test:
c = None
<<howToCreateANewNameSpace>>:
# Objects created here are local to this scope
a = 1
b = 2
global c
c = a + b

 

[Fredrik Lundh]

This one works. But I suppose there must be a way to artificially
create a new block of code, some thing like this,

class Test:
c = None
<<howToCreateANewNameSpace>>:
# Objects created here are local to this scope
a = 1
b = 2
global c
c = a + b

if you want a local scope, use a function:

class Test:
c = do_calculation(1, 2)

</F>

 

[Piet van Oostrum]

jssgc> This one works. But I suppose there must be a way to artificially
jssgc> create a new block of code, some thing like this,

jssgc> class Test:
jssgc> c = None
jssgc> <<howToCreateANewNameSpace>>:
jssgc> # Objects created here are local to this scope
jssgc> a = 1
jssgc> b = 2
jssgc> global c
jssgc> c = a + b

As you want c to be an *instance* variable, the normal idiom would be:

class Test:
def __init__(self):
a = 1
b = 2
self.c = a+b

x = Test()
print x.c

 

[Paul Boddie]

Yes. I want to have only one class variable called c and a and b are
required as temporary variables to calculate the value for c.

I just found one way:
class Test:
a = 1
b = 2
c = a + b
del a,b

Or even...

a = 1
b = 2
class Test:
c = a + b

Or even the apparently nonsensical...

a = 1
b = 2
c = a + b
class Test:
c = c

Insert del statements to remove module globals where appropriate.

Paul