def __setitem__(self, i, expr):
'''Sets chord note head `i` to `expr`.
Returns none.
'''
from abjad.tools.notetools.NoteHead import NoteHead
if isinstance(i, slice) and expr == []:
note_head = []
elif isinstance(expr, NoteHead):
note_head = expr
note_head._client = self
else:
note_head = NoteHead(expr)
note_head._client = self
#note_head._client = self
self._note_heads[i] = note_head
self._note_heads.sort()
def append(self, note_head):
r'''Appends `note_head` to chord.
.. container:: example
**Example.**
::
>>> chord = Chord("<e' cs'' f''>4")
>>> show(chord) # doctest: +SKIP
::
>>> chord.append("g''")
>>> show(chord) # doctest: +SKIP
.. doctest::
>>> f(chord)
<e' cs'' f'' g''>4
Set `note_head` to a pitch, pitch name, pitch number or note head.
Sorts note heads automatically.
Returns none.
'''
from abjad.tools.notetools.NoteHead import NoteHead
if isinstance(note_head, NoteHead):
note_head = note_head
else:
note_head = NoteHead(written_pitch=note_head)
note_head._client = self
self._note_heads.append(note_head)
self._note_heads.sort()