Helper Classes¶

Quality

Quality ¶

class chordparser.Quality(quality_str, ext_str=None, flat_ext=False)¶

A class representing the quality of a Chord.

The Quality class composes of its base Chord quality, extensions to the Chord, and optional flats on the extended Note.

Parameters:	quality_str (str) – The Quality’s notation. ext_str (str, Optional) – The extended Chord’s notation. flat_ext (boolean, Optional) – Selector for the flat of the extended Note. Default False when optional.

value¶

The Quality’s notation.

Type:	str

ext¶

The extended Chord’s notation.

Type:	str, Optional

flat_ext¶

Selector for the flat of the extended Note. Default False when optional.

Type:	boolean, Optional

base_intervals¶

The intervals of the triad of a Chord with this Quality.

Type:	tuple of int

base_degrees¶

The scale degrees of the triad of a Chord with this Quality.

Type:	tuple of int

base_symbols¶

The accidentals of the triad of a Chord with this Quality.

Type:	tuple of str

intervals¶

The intervals of a Chord with this Quality.

Type:	tuple of int

degrees¶

The scale degrees of a Chord with this Quality.

Type:	tuple of int

symbols¶

The accidentals of a Chord with this Quality.

Type:	tuple of str

Raises:	`ValueError` – If a dominant chord has a value of ‘major’ (value should be ‘dominant’) `ValueError` – If a diminished extended chord does not have a ext of ‘diminished seventh’ `ValueError` – If a ‘seventh’ extended chord has a flat extension (should be reflected in ext and not in flat_ext)

__eq__(other)¶

Compare between other Qualitys.

Checks if the other Quality has the same value, ext and flat_ext.

Parameters:	other – The object to be compared with.
Returns:	The outcome of the value comparison.
Return type:	boolean

Examples

>>> QE = QualityEditor()
>>> q = QE.create_quality("maj9")
>>> q2 = QE.create_quality("maj9")
>>> q == q2
True
>>> q3 = QE.create_quality("majb9")
>>> q == q3
False

Helper Classes¶

Quality¶

Quality ¶