where is best place for import statements?

[Matthew Wilson]

Hi-


I'm writing a bunch of classes, several of which need functions and
variables defined in the math module.  In some instances, I'm going to
import my module like this:

import myshapes

and then in others, I'll do:

from myshapes import Circle

or even:

from myshapes import *

How do I make sure that no matter how I import stuff from myshapes.py, I
always also import the math module?  Should I write all of my functions
like so:

def foo1():
    import math
    return math.pi

def foo2():
    import math
    return 2*math.pi

and all my classes like this:

class Circle:
    def __init__(self,x, y, r):
        import math
        self.circumference = 2*r*math.pi

Is this the way to solve the problem?


Thanks for the help.