pip install skyfield
#!/usr/bin/env python3
from skyfield.api import load
planets = load('de421.bsp')
earth = planets['earth' ]
mars = planets['mars' ]
t_now = load.timescale().now()
ra, dec, distance = earth.at(t_now).observe(mars).radec()
print(ra, dec, distance)
load('de421.bsp') creates a local file with this name.