从同一类的另一个函数访问变量

Question

from folder_exp import my_tcommands as t
class Gravity(EarthG):
    def __init__(self):
        super(Gravity, self).__init__()

    def check(self):
        original = t.get_gravity()
        print "Original gravity from the function:", original
        my_gravity = 9.888
        t.set_gravity(my_gravity)


    def verify(self):

I have to load original gravity here in verify using t.set_gravity(original) but I have already re-written the gravity using t.set_gravity(my_gravity) in check function hence if I do t.get_gravity again, it gives me 9.888 and not the original one .

What is the way to access original from check so that I can do the following operation in verify method.

def verify(self):
    t.set_gravity(original)

Answer 1

The name original and, potentially, the object to which it refers disappear once the enclosing function returns. If you want to access it later, you have to create a new name which will not go out of scope so soon.

A convenient place to store it is in the object itself:

def check(self):
    self.original = t.get_gravity()
    print "Original gravity from the function:", self.original
    my_gravity = 9.888
    t.set_gravity(my_gravity)

A subsequent invocation will see that object:

def verify(self):
    t.set_gravity(self.original)