check_rays

salsa.utils.check_rays(ray_dir, n_rays, fields, parallel=True)

Check if a directory already contains a given number of trident lrays and contains necessary fields

Parameters:

• ray_dir (str) – The path to the directory where rays are held

• n_rays (int) – The number of lrays that should be in the directory

• fields (list, str) – List of the fields needed in each light ray

Returns:

ray_bool – True if there are n_rays in the ray_dir and each one contains necessary fields. If no rays are found then returns False. Otherwise if the rays found don’t match requirements an error is raised (see below).

Return type:

bool

Raises:

RuntimeError – This is raised if there are a non-zero number of rays but they don’t match the specified number of rays, don’t contain the specified fields, or simply can’t be opened.