16.4. SightNotes.addPara(): Add a paragraph
of notes
The instance's .notes attribute is
initially None. If any notes are added,
we create a Narrative instance, which is a
container for Paragraph objects, and add
the new paragraph to it. See Section 18.1, “Narrative.__init__(): Constructor”
and Section 18.2, “Narrative.addPara(): Add a
paragraph”.
birdnotes.py
# - - - S i g h t N o t e s . a d d P a r a
def addPara(self, para):
"""Add a paragraph of notes.
"""
#-- 1 --
# [ if self.notes is None ->
# self.notes := a new, empty Narrative instance
# else -> I ]
if self.notes is None:
self.notes = Narrative()
#-- 2 --
# [ self.notes := self.notes with para added as its new
# last element ]
self.notes.addPara(para)
