Explain Scopes in Python?

Every object in Python functions within a scope. A scope is a block of code where an object in Python remains relevant. Namespaces uniquely identify all the objects inside a program. However, these namespaces also have a scope defined for them where you could use their objects without any prefix. A few examples of scope created during code execution in Python are as follows:

Local Scope :

A variable created inside a function belongs to the local scope of that function, and can only be used inside that function

def func():
		 no = 100
		 print(no)

func() 
  
100

Global Scope

A global scope refers to the objects available throught the code execution since their inception.

no = 100

def func():
     print(x)

func()
print(x)

100
100

Function Inside Function

The local variable can be accessed from a function within the function

def func():
     no = 100
     def innerfunc():
            print(no)
     innerfunc()

func()
100

Naming Variables

Same variable name inside and outside of a function, Python will consider them as two separate variables, one available in the global scope (outside the function) and one available in the local scope (inside the function):

no = 100

def func():
   no = 200
   print(no)

func()
print(no)

200
100

Using Global Keyword

Use the global keyword, the variable belongs to the global scope

def func():
    global no
    no = 100
  
func()
  
print(no)

100