<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def dimensions(self, dims):
 """Sets the dataset dimensions. Pass a length three tuple of integers"""

        nx, ny, nz = dims[0], dims[1], dims[2]
        self.SetDimensions(nx, ny, nz)
        self.Modified()