def appendGuideline(self, position, angle, name=None, color=None):
"""
Append a new guideline to the font.
>>> guideline = font.appendGuideline((50, 0), 90)
>>> guideline = font.appendGuideline((0, 540), 0, name="overshoot",
>>> color=(0, 0, 0, 0.2))
**position** must be a :ref:`type-coordinate`
indicating the position of the guideline.
**angle** indicates the :ref:`type-angle` of
the guideline. **name** indicates the name
for the guideline. This must be a :ref:`type-string`
or ``None``. **color** indicates the color for
the guideline. This must be a :ref:`type-color`
or ``None``. This will return the newly created
:class:`BaseGuidline` object.
"""
position = normalizers.normalizeCoordinateTuple(position)
angle = normalizers.normalizeGuidelineAngle(angle)
if name is not None:
name = normalizers.normalizeGuidelineName(name)
if color is not None:
color = normalizers.normalizeColor(color)
return self._appendGuideline(position, angle, name=name, color=color)
def _set_base_name(self, value):
if value is not None:
value = normalizers.normalizeGuidelineName(value)
self._set_value(value)
def _get_base_name(self):
value = self._get_name()
if value is not None:
value = normalizers.normalizeGuidelineName(value)
return value