axis = 1表示按列的方向遍历
axis = 0表示按行的方向遍历
Usually axis=0 is said to be "column-wise" (and axis=1 "row-wise"),
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axis = 1表示按列的方向遍历
axis = 0表示按行的方向遍历
Usually axis=0 is said to be "column-wise" (and axis=1 "row-wise"),
相关文章：