how to convert image in grayscale image using python code example

Example 1: cv2 grayscale

gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

Example 2: convert an image to grayscale python using numpy array

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import numpy as np
from PIL import Image

im = np.array(Image.open('kolala.jpeg').convert('L')) #you can pass multiple arguments in single line
print(type(im))

gr_im= Image.fromarray(im).save('gr_kolala.png')