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Get Started with NumPy

Get Started​

We need to import first the numpy library:

import numpy as np

Numpy - 1D array​

list = [4,5,6,7,8,9]

# Creating a 1D array
np_array = np.array(list)

print(np_array) # Output: array([4,5,6,7,8,9])
# Example - Multiply per element
multiply_per_elelement = np_array * 2

print(multiply_per_elelement) #Output: [8 10 12 14 16 18]

Checking the data type using type() function​

Let's check what is the data type

type(np_array)

#output: numpy.ndarray

NumPy - 2D array​

python_lists = [[1,2,3], [4,5,6], [7,8,9]]

print(np.array(python_lists)) # Output: array([[1,2,3], [4,5,6], [7,8,9]])