Python で浮動小数点数 float のメモリ上のバイト列を確認してみる - Qiita

>>> import ctypes >>> f = ctypes.c_float(0.5) >>> f c_float(0.5) >>> memoryview(f).tobytes() b'\x00\x00\x00?' >>> memoryview(f).cast('B', shape=(4,))[3] = 0x3e >>> f c_float(0.125) >>> memoryview(f).cast('B', shape=(4,))[3] = 0x40 >>> f c_float(2.0) >>> memoryview(f).cast('B', shape=(4,))[:] = bytes([0x3a, 0xcd, 0x13, 0xbf]) >>> f c_float(-0.5773502588272095) >>> import ctypes >>> a = ctypes.c_flo