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import uctypes

desc = {

"f32": uctypes.FLOAT32 | 0,

"f64": uctypes.FLOAT64 | 0,

"uf64": uctypes.FLOAT64 | 2, # unaligned

}

data = bytearray(10)

S = uctypes.struct(uctypes.addressof(data), desc, uctypes.LITTLE_ENDIAN)

S.f32 = 12.34

print('%.4f' % S.f32)

S.f64 = 12.34

print('%.4f' % S.f64)

S.uf64 = 12.34

print('%.4f' % S.uf64)