10.1 Iterators&Generators.pdf

(1043 KB) Pobierz

Iterators and Generators

•

Iterators allow us to iterate through a sequence of element I.e, visiting each

element once in a sequence

dictionary

•

We can pass any sequence to the iterator like

list , string , tuple , set and

•

In python there is a built in function called

iter

for iteration

#next(itr) give next element in sequence

•

We can write our own iterators which are called

“GENERATORS”

they work just

like iterators

•

Lets see this with an example which displays days of a week and once the

sequence is completed and called again it should return the ﬁrst value and so

on…

# For a loop to remain in same

state we use

yield

it’ll not stop

the function but keep function on

hold and return value