Creating values

import sf

sf.sf16(0.5)        # sf16(0.5)
sf.sf16(0.1)        # sf16(0.100006103515625)
sf.sf8(0.1)         # sf8(0.1015625)
sf.sf4(0.3)         # sf4(0.25)
sf.sf16()           # sf16(0.0)

sf.dtype("sf8")     # <class 'sf.sf8'>
sf.dtype(16)        # <class 'sf.sf16'>

sf.sf16("0.1")               # sf16(0.100006103515625), same code as the float here
sf.sf16(sf.sf8(0.5))         # sf16(0.5)
sf.sf8(sf.sf16(0.5))
# SFTypeError: cannot store sf16 into sf8 implicitly; use sf.cast(x, sf.sf8)

sf.sf16(1)
# SFOverflowError: 1 is not representable in sf16 (max 0.999969482421875)

sf.sf16(0.99999)
# SFOverflowError: 0.99999 is not representable in sf16 (max 0.999969482421875)

sf.sf16(1e-6)
# sf16(0.0)   SFUnderflowWarning: 1e-06 underflows to 0 in sf16

sf.sf16(float("nan"))
# SFInvalidError: nan is not a valid sf16 input

sf.from_code(16384, sf.sf16)            # sf16(0.5)
sf.from_bits(0x8000 | 16384, sf.sf16)   # sf16(-0.5): sign bit plus magnitude

top = sf.sf16(sf.info(sf.sf16).max)     # sf16(0.999969482421875)