<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _interpret_angle(name, angle_object, angle_float, unit='degrees'):
 """Return an angle in radians from one of two arguments. It is common for Skyfield routines to accept both an argument like `alt` that takes an Angle object as well as an `alt_degrees` that can be given a bare float or a sexagesimal tuple. A pair of such arguments can be passed to this routine for interpretation. """

    if angle_object is not None:
        if isinstance(angle_object, Angle):
            return angle_object.radians
    elif angle_float is not None:
        return _unsexagesimalize(angle_float) * _from_degrees
    raise ValueError('you must either provide the {0}= parameter with'
                     ' an Angle argument or supply the {0}_{1}= parameter'
                     ' with a numeric argument'.format(name, unit))