PYTHON NAMESPACE AND SCOPE

 

PYTHON NAMESPACE AND SCOPE

Namespaces

a=2

b=2

print("a=",id(a))

print("b=",id(b))

#The above print statement print both id is same

#Even you try to print

print(id(2))    #it is also the same id of a & b

#python interpreter dynamically map the name space

c="hai"

d="xyz"

e="hai"

#the above assignment c and e refer the same   name space but d is different

print("id(c)=",id(c))

print("id(e)=",id(e))

print("id(d)=",id(d))

output:

a=505910976

b=505910976

505910976

id(c)=36027328

id(e)=36027328

id(d)=36012960

 

#Note :you may get different value of id

a=2

print('id(2)=',id(2))   

#output:

id(2)=10919424

print('id(a)=',id(a))

#output:

id(a)=10919424

#Here ,both refer to the same object. Let's make things #a little more interesting.

 #Note :you may get different value of id

a=2

print('id(a)=',id(a))

#output:

id(a)=10919424   

a=a+1

print ('id(a)=',id(a))

  #output:

id(a=10919456)

print('id(3)=',id(3))

#output:

id(3)=10919456

b=2

print('id(2)=',id(2))

#output:

id(2)=10919424

Python Namespace

Namespace is a Collection of names.

python variable scope 

Program1

def outer_function():

         b=20

         def inner_func():

             c=30

a=10

 

Program2

def outer_function():

       a=20

        def inner_function():

               a=30

               print('a=',a)

        inner_function()

        print('a=',a)

a=10

outer_function()

print('a=',a)

 

output:

a=30

a=20

a=10

Program 3

we declare a as global the variable will be set in globally and prints all function in that global variable 30

def outer_function():

       global a

       a=20

       def inner_function():

             global a

             a=30

             print('a=',a)

       inner_function()

       print('a=',a)

a=10

outer_function()

print('a=',a)

output:

a=30

a=30

a=30