What is the difference between images in 'P' and 'L' mode in PIL?

Question

According to https://pillow.readthedocs.io/en/3.1.x/handbook/concepts.html#concept-modes,

1. What are the difference between them?
2. Can we convert from on

Answer 1

"L" mode maps to black and white pixels (and in between). "P" mode maps with a color palette. You can convert image to one of these modes.

from PIL import Image

im = Image.open("im.jpg")
im_l = im.convert('L')
im_p = im.convert('P')

im.show()
im_l.show()
im_p.show()