a = tf.random.normal([4, 35, 8])
b = tf.expand_dims(a, axis=0)
print(b.shape)
c = tf.expand_dims(a, axis=3)
print(c.shape)
d = tf.expand_dims(a, axis=-1)
print(d.shape)
e = tf.expand_dims(a, axis=-4)
print(e.shape)a = tf.random.normal([4, 35, 8])
b = tf.expand_
阅读背景：
tensorflow中expand_dim()与squeeze()_每日提升一点点
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