# scipy.constants.precision

scipy.constants.precision(key)

  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

  Examples

      >>> from scipy import constants
      >>> constants.precision(u'proton mass')
      5.1e-37

scipy.constants.unit scipy.constants.find