eric-switzer/physical_constants

library of physical constants (json/python)

Physical constants in JSON/python

Available constants:

• NIST_constants_Feb2013.json: full set of CODATA, mks units
• NIST_constants_Feb2013_cgs.json: a reduced version of the above in cgs units
• astrophysical.json: astrophysical constants (mostly cgs)

Model:

• Several groups of constants can be combined into a common library that functions use
• Tasks with loading/saving/combining of groups are managed by a class
• This class can produce a python dictionary of just the constants (leaving out descriptions and units) that is fast to use in functions.
• Alternately, the constants can be registered as variables in a module that is imported.
• Functions can derive new constants based on fundamental ones and save these in the same structure
• For a particular code, one can combine and then save a useful set of constants/paramters.