input type- can't convert np.ndarray of type numpy.object

[shimasadri]

I keep getting the following error.
TypeError: can't convert np.ndarray of type numpy.object_. The only supported types are: float64, float32, float16, complex64, complex128, int64, int32, int16, int8, uint8, and bool.

with another input I get TypeError: can't multiply sequence by non-int of type 'float'

what should be the type of input file?