def from_std( class_, value ):
# Convert standard to m/s
mps = MPS.from_std( value )
# Convert m/s to Beaufort scale
b = (mps/0.836)**(2/3)
return b
def to_std( class_, value ):
# Convert Beaufort scale to m/s
mps = 0.836*value**(3/2)
# Standardize m/s value
s= MPS.to_std( mps )
return s