from scipy import constants
print(constants.gram)
print(constants.metric_ton)
print(constants.grain)
print(constants.lb)
print(constants.pound)
print(constants.oz)
print(constants.ounce)
print(constants.stone)
print(constants.long_ton)
print(constants.short_ton)
print(constants.troy_ounce)
print(constants.troy_pound)
print(constants.carat)
print(constants.atomic_mass)
print(constants.m_u)
print(constants.u)