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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def getcolnp(self, columnname, nparray, startrow=0, nrow=-1, rowincr=1):
 """Get the contents of a column or part of it into the given numpy array. The numpy array has to be C-contiguous with a shape matching the shape of the column (part). Data type coercion will be done as needed. If the column contains arrays, they should all have the same shape. An exception is thrown if they differ in shape. In that case the method :func:`getvarcol` should be used instead. The column can be sliced by giving a start row (default 0), number of rows (default all), and row stride (default 1). """

        if (not nparray.flags.c_contiguous) or nparray.size == 0:
            raise ValueError("Argument 'nparray' has to be a contiguous " +
                             "numpy array")
        return self._getcolvh(columnname, startrow, nrow, rowincr, nparray)