def fractional(points, fi, LatLon=None, **LatLon_kwds):
'''Return the point at a given I{fractional} index.
@arg points: The points (C{LatLon}[], L{Numpy2LatLon}[],
L{Tuple2LatLon}[] or C{other}[]).
@arg fi: The fractional index (C{float} or C{int}).
@kwarg LatLon: Optional class to return the I{intermediate},
I{fractional} point (C{LatLon}) or C{None}.
@kwarg LatLon_kwds: Optional B{C{LatLon}} keyword arguments,
ignored of B{C{LatLon=None}}.
@return: A B{C{LatLon}} or if B{C{LatLon}} is C{None}, a
L{LatLon2Tuple}C{(lat, lon)} for B{C{points[fi]}} if
I{fractional} index B{C{fi}} is C{int}, otherwise the
intermediate point between B{C{points[int(fi)]}} and
B{C{points[int(fi) + 1]}} for C{float} I{fractional}
index B{C{fi}}.
@raise IndexError: Fractional index B{C{fi}} invalid or
B{C{points}} not subscriptable.
'''
try:
if not (isscalar(fi) and 0 <= fi < len(points)):
raise IndexError
p = _fractional(points, fi)
except (IndexError, TypeError):
raise _IndexError(fractional.__name__, fi)
if LatLon and isinstance(p, LatLon2Tuple):
p = LatLon(*p, **LatLon_kwds)
return p
def __getattr__(self, name):
try:
return tuple.__getitem__(self, self._Names_.index(name))
except IndexError:
raise _IndexError(_dot_(self.classname, '<name>'), name)
except ValueError:
return tuple.__getattribute__(self, name)
def __getattr__(self, name):
'''Get the value of an attribute or item by B{C{name}}.
'''
try:
return tuple.__getitem__(self, self._Names_.index(name))
except IndexError:
raise _IndexError(_DOT_(self.classname, Fmt.ANGLE(_name_)), name)
except ValueError:
return tuple.__getattribute__(self, name)