In Python, Itertools is the inbuilt module that allows us to handle the iterators in an efficient way. They make iterating through the iterables like lists and strings very easily. One such itertools function is islice(). Note: For more information, refer to Python Itertools
islice() function
This iterator selectively prints the values mentioned in its iterable container passed as an argument. Syntax:
islice(iterable, start, stop, step)
Example 1:
Python3
# Python program to demonstrate# the working of islicefrom itertools import islice# Slicing the range functionfor i in islice(range(20), 5): print(i) li = [2, 4, 5, 7, 8, 10, 20]# Slicing the listprint(list(islice(li, 1, 6, 2))) |
Output:
0 1 2 3 4 [4, 7, 10]
Example 2:
Python3
from itertools import islicefor i in islice(range(20), 1, 5): print(i) |
Output:
1 2 3 4
Here we have provide the three-parameter that is range(), 1 and 5. So the first parameter that is iterable as range and second parameter 1 will be considered as start value and 5 will be considered as stop value. Example 3:
Python3
from itertools import islicefor i in islice(range(20), 1, 5, 2): print(i) |
Output:
1 3
Here we provide the four-parameter that is range() as iterable, 1, 5 and 2 as stop value. So the first parameter that is iterable as range and second parameter 1 will be considered as start value and 5 will be considered as stop value and 2 will be considered as step value of how many steps to skip while iterating values.
