from scipy import constants
print(constants.liter)
print(constants.litre)
print(constants.gallon)
print(constants.gallon_US)
print(constants.gallon_imp)
print(constants.fluid_ounce)
print(constants.fluid_ounce_US)
print(constants.fluid_ounce_imp)
print(constants.barrel)
print(constants.bbl)