human
Write me a the Python code you requested given the following:
I am working on the file "Chapter 07 - Adding Variables to SCalc.ipynb".
The first task is:
So, how many variables are there?
Closures
To explore more complex variable bindings, we introduce the idea of a closure. A closure is a fuction that captures the bindings of variables.
Can you write Python code for it?
assistant
#Here is the Python code you requested.

x = 1
y = 2
def make_closure():
    x = 3
    y = 4
    def f():
        print(x, y)
    return f

c = make_closure()
c()

x, y

c()

x = 5
y = 13
def make_closure():
    x = 42
    y = 911
    def func():
        global x # sees the global value
        print(x, y)
        x += 1

    return func

def make_closure():
    value = 0
    def get_next_value():
        nonlocal value
        value += 1
        return value
    return get_next_value