3.2.2.1.3. scipy.constants.precision¶

scipy.constants.precision(key)[source]¶

Relative precision in physical_constants indexed by key

Parameters:	key : Python string or unicode Key in dictionary physical_constants
Returns:	prec : float Relative precision in physical_constants corresponding to key

See also

codata

Contains the description of physical_constants, which, as a dictionary literal object, does not itself possess a docstring.

Examples

>>> from scipy import constants
>>> constants.precision(u'proton mass')
1.2555138746605121e-08