Open and show an image in a Python notebook, using `IPython`, `PIL`, and `numpy`.

show_img.py

def open_image(path):
    from PIL import Image
    import numpy as np

    img = Image.open(path)
    return np.asarray(img)


# Using PIL and IPython
def show_img(img):
    import IPython
    from PIL import Image
    from io import BytesIO

    img = Image.fromarray(img)
    with BytesIO() as f:
        img.save(f, format="png")
        data = f.getvalue()

    i = IPython.display.Image(data=data)
    IPython.display.display(i)
    
    
# Implementation using matplotlib
def show_img(img):
    """image should be in (channel, height, width)"""
    assert len(img.shape) == 3
    assert img.shape[0] == 3

    img = img.permute(1, 2, 0)
    
    %matplotlib inline
    import matplotlib.pyplot as plt
    from IPython import display

    display.clear_output(wait=True)
    plt.imshow(img)
    plt.show()