numpy.delete删除列的方法

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.