how to define global variable python?

Question

How do i use a global var in python?

class CompareRectangles(object):

    debugging = True

    def globals():
        global debugging
        debugging = True

    def __init__(self,r1,r2):
        # globals()
        self.r1 = r1
        self.r2 = r2
        self.initialise_boundary_tests()

    def method(self):
        if debugging:
            print("hello debugger")

compare_rects = CompareRectangles(r1,r2) NameError: global name 'debugging' is not defined

Answer 1

That's not a global, that's a class variable. You can access it by self.debugging . I don't understand why you need the globals() method.

class CompareRectangles(object):

    debugging = True

    def __init__(self,r1,r2):
        self.r1 = r1
        self.r2 = r2
        self.initialise_boundary_tests()

    def method(self):
        if self.debugging:
            print("hello debugger")

Answer 2

Really close. You need to add self

Change

def method(self):
    if debugging:
        print 'hello debugger'

to

def method(self):
    if self.debugging:    <-- notice the self
        print 'hello debugger'

Code to explain your example :)