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The cause of the problem is solved
problem
Run the following code to prompt for an error
rowsum = np.array([1,2,3])
r_inv = np.power(rowsum, -1)
ValueError: Integers to negative integer powers are not allowed.
reason
The data type of rowsum is integer, not floating-point number. Only floating-point number can perform power operation
solve
rowsum = np.array([1,2,3], dtype=np.float32)
r_inv = np.power(rowsum, -1)
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