"Robert Kern" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > T. Crane wrote: >> Hi, >> >> If I define a class like so: >> >> class myClass: >> import numpy >> a = 1 >> b = 2 >> c = 3 >> >> def myFun(self): >> print a,b,c >> return numpy.sin(a) >> >> >> I get the error that the global names a,b,c,numpy are not defined. >> Fairly >> straightforward. But if I am going to be writing several methods that >> keep >> calling the same variables or using the same functions/classes from >> numpy, >> for example, do I have to declare and import those things in each method >> definition? Is there a better way of doing this? > > Put your imports at the module level. I'm not sure what you intended with > a, b, > c so let's also put them at the top level.
If you put them at the top level, and suppose you saved it all in a file called test.py, then when you type ln [1]: from test import myClass does it still load a,b,c and numpy into the namespace? > > import numpy > a = 1 > b = 2 > c = 4 > > class myClass: > def myFun(self): > print a, b, c > return numpy.sin(a) > > > OTOH, if a, b, c were supposed to be attached to the class so they could > be > overridden in subclasses, or be default values for instances, you can > leave them > in the class definition, but access them through "self" or "myClass" > directly. Yeah, they don't need to be accessed anywhere other than within the class itself and I won't need to overwrite them, so I'll try just putting them in the top level. thanks, trevis > > > import numpy > > class myClass: > a = 1 > b = 2 > c = 4 > > def myFun(self): > print self.a, self.b, myClass.c > return numpy.sin(self.a) > > -- > Robert Kern > > "I have come to believe that the whole world is an enigma, a harmless > enigma > that is made terrible by our own mad attempt to interpret it as though it > had > an underlying truth." > -- Umberto Eco > -- http://mail.python.org/mailman/listinfo/python-list
