xlwt_Exception: Unexpected data type class 'numpy.int32'

for r in range(data.shape[0]):
    for c in range(data.shape[1]):
        ws_1.write(r,c,data[r,c])

solution:

for r in range(data.shape[0]):
    for c in range(data.shape[1]):
        ws_1.write(r,c,str(data[r,c]))