python scope

1#Every one can use this varible
2x = 9
3def num_returner():
4    return x
5print(num_returner())
6
7#--------------------------------------
8x = 90
9def private_var():
10  num = 20
11  return x + num
12print(private_var())
13#it will give an error because it is not the public variable on the function 
14print(num)
15

1a = 5
2
3def f1():
4  a = 2
5  print(a)
6  
7print(a)   # Will print 5
8f1()       # Will print 2

1a = 5
2b = 3
3
4def f1():
5  a = 2
6  print(a)
7  print(b)
8  
9print(a)   # Will print 5
10f1()       # Will print 2 and 3