In Python, array or list can be modified or accessed using Slicing Method. It is constructed by giving input parameter such as start, stop, and step to the built-in slice function. It is passed to the array to extract a part of array. Slicing means taking elements from one index to another given index.
Syntax:
slice_1 = array_name[start:end]
slice_2 = array_name[start:end:step]Example:
import numpy as np
a=np.array([1,2,3,4,5,6,7,8])
b=np.array([[1,2,3,4,5],[6,7,8,9,10]])
print(a[1:3:2])
print(a[-3:-1])
print(a[:5])
print(a[1:2])
print(b[0:2, 2:4])
print(b[0:3, 4])
print(b[0:2, 1:3])Output:
[2] [6 7] [1 2 3 4 5] [2] [[3 4] [8 9]] [ 5 10] [[2 3] [7 8]]