Pixel pitch calculator (for Android)

pixelpitch.py

#!/usr/bin/python
from math import trunc
import sys

if len(sys.argv) <= 1:
    print('pixelpitch.py <width> <height> <size in inch>')
    quit()

width = float(sys.argv[1])
height = float(sys.argv[2])
size = float(sys.argv[3])

diagonal_pixel = (width**2 + height**2)**(1/2)
pitch = (size/diagonal_pixel) * 25.4
pitch_truncated = trunc(pitch * 1000 * 100) / 100

print(f'''Pixel pitch: {pitch}

<item name="pixel_pitch" format="float" type="dimen">{pitch_truncated}</item>''')