Constants

CIE

colour.constants

CONSTANT_K_M	Rounded maximum photopic luminous efficiency \(K_m\) value in \(lm\cdot W^{-1}\).
CONSTANT_KP_M	Rounded maximum scotopic luminous efficiency \(K^{\prime}_m\) value in \(lm\cdot W^{-1}\).

CODATA

colour.constants

CONSTANT_AVOGADRO	Avogadro constant.
CONSTANT_BOLTZMANN	Boltzmann constant.
CONSTANT_LIGHT_SPEED	Speed of light in vacuum.
CONSTANT_PLANCK	Planck constant.

Common

colour.constants

PATTERN_FLOATING_POINT_NUMBER	str(object='') -> str str(bytes_or_buffer[, encoding[, errors]]) -> str
THRESHOLD_INTEGER	Integer threshold value when checking if a float point number is almost an int.
EPSILON	Double-precision floating-point number type, compatible with Python float and C double.
DTYPE_INT_DEFAULT	alias of int64
DTYPE_FLOAT_DEFAULT	alias of float64
TOLERANCE_ABSOLUTE_DEFAULT	Convert a string or number to a floating point number, if possible.
TOLERANCE_RELATIVE_DEFAULT	Convert a string or number to a floating point number, if possible.
TOLERANCE_ABSOLUTE_TESTS	Convert a string or number to a floating point number, if possible.
TOLERANCE_RELATIVE_TESTS	Convert a string or number to a floating point number, if possible.