This Python package is used to classify young stellar objects using the
standard classification scheme originally devised by Lada et al. (1984).
It determines the infrared spectral index $\alpha_{IR}$ in the range
from $2,\mu\mathrm{m}$ to $20,\mu\mathrm{m}$, estimating the slope
of the spectral energy distribution. Based on the measured slope, the
YSOs are divided into 5 distinct classes (0/I, flat spectrum, II,
III with debris disk, III no disk/MS star).
