TypeError: ufunc ‘true_divide‘ output (typecode ‘d‘) could not be coerced to provided outp
深度学习中图片处理经常用到的预处理代码：
……if mode == 'tf':x /= 127.5x -= 1.if x.ndim == 3:x = np.expand_dims(x, 0)return xif mode == 'custom':x /= 255if x.ndim == 3:x = np.expand_dims(x, 0)return xif mode == 'torch':x /= 255.mean = [0.485, 0.456, 0.406]std = [0.229, 0.224, 0.225]
在之前要加一句类型转换，否则会报错：TypeError: ufunc ‘true_divide’ output (typecode ‘d’) could not be coerced to provided output parameter (typecode ‘B’) according to the casting rule ‘‘same_kind’’
x = x.astype(np.float32)
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