基础介绍：

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numpy.delete
numpy.delete(arr, obj, axis=None)[source]
 Return a new array with sub-arrays along an axis deleted. For a one dimensional array, this returns those entries not returned by arr[obj].
 Parameters:	
 arr : array_like
  Input array.
 obj : slice, int or array of ints
  Indicate which sub-arrays to remove.
 axis : int, optional
  The axis along which to delete the subarray defined by obj. If axis is None, obj is applied to the flattened array.
 Returns:	
 out : ndarray
  A copy of arr with the elements specified by obj removed. Note that delete does not occur in-place. If axis is None, out is a flattened array.

标题名称：numpy.delete删除一列或多列的方法-创新互联
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