label.leaf_pcs

abjad.tools.label.leaf_pcs(expr, number=True, color=False)

Iterate expr and label all leaf pitch classes.

When number = True add markup below leaves.

abjad> t = Staff(construct.scale(4))
abjad> label.leaf_pcs(t)
abjad> print t.format
\new Staff {
   c'8 _ \markup { \small 0 }
   d'8 _ \markup { \small 2 }
   e'8 _ \markup { \small 4 }
   f'8 _ \markup { \small 5 }
}

When color = True call color_by_pc().

abjad> t = Staff(construct.scale(4))
abjad> label.leaf_pcs(t)
abjad> print t.format
\new Staff {
   \once \override NoteHead #'color = #(x11-color 'red)
   c'8
   \once \override NoteHead #'color = #(x11-color 'orange)
   d'8
   \once \override NoteHead #'color = #(x11-color 'ForestGreen)
   e'8
   \once \override NoteHead #'color = #(x11-color 'MediumOrchid)
   f'8
}

You can of course set number and color at the same time.

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