24) }
25) yield person

26)

27) '''''t1 = time.clock()
28) people = people_list(10000000)
29) t2 = time.clock()'''

30)

31) t1 = time.clock()
32) people = people_generator(10000000)
33) t2 = time.clock()

34)

35) print('Took {}'.format(t2-t1))

Note: In the above program observe the differnce wrt execution time by using list and generators

Generators vs Normal Collections wrt Memory Utilization:

Normal Collection:

l=[x*x for x in range(10000000000000000)]

print(l[0])

We will get MemoryError in this case because all these values are required to store in the memory.

Generators:

g=(x*x for x in range(10000000000000000))

We won't get any MemoryError because the values won't be stored at the beginning

ModulesA group of functions, variables and classes saved to a file, which is nothing but module.

Every Python file (.py) acts as a module.

Eg: durgamath.py

2)

3) def add(a,b):
4) print("The Sum:",a+b)

5)

6) def product(a,b):
7) print("The Product:",a*b)

durgamath module contains one variable and 2 functions.

If we want to use members of module in our program then we should import that module.

import modulename

We can access members by using module name.

modulename.variable

modulename.function()

test.py: