Point-Line Distance 3-Dimensional

[emanuelef]

Hi,
I'm trying to understand if with pyproj I can get the minimum distance between one 3D point(lat, lon, alt) and the line segment generated by two other 3D points.
This is better explained here:
Point-Line Distance--3-Dimensional

In my case I'm trying to find the minimum distance in meters from a point on the ground (but considering elevation) and a flying object passing by two points.

Thanks