pyabc2.Key¶

class pyabc2.Key(name=None, *, tonic=None, mode=None)¶

Key, including mode.

Pass either name (key spec with tonic and mode combined, used in ABC notation) or tonic and mode.

Parameters:

name (str | None) – Key name (e.g., D, Amaj, Em, Ador, Bbmin, …). (Major assumed if mode not specified.)
tonic (str | None) – Tonic of the key (e.g., C, D, …).
mode (str | None) – Mode specification, (e.g., maj, min, dor, …).

Examples

>>> from pyabc2 import Key
>>> Key('C')
Key(tonic=C, mode='Major')

>>> Key('Ador')
Key(tonic=A, mode='Dorian')
>>> Key('Em')
Key(tonic=E, mode='Minor')

>>> Key(tonic='Bb', mode='Locrian')
Key(tonic=Bb, mode='Locrian')

__init__(name=None, *, tonic=None, mode=None)¶

Parameters:

Methods

`__init__`([name, tonic, mode])
`parse_key`(key)	Parse a key spec string (e.g., `D`, `Amin`) and return the tonic and mode (3-char abbreviation).
`print_chromatic_scale_degrees`(**kwargs)
`print_intervals`(*[, fmt])
`print_scale`()
`print_scale_chromatic_values`()
`print_scale_degrees_wrt_major`(**kwargs)
`relative`(mode, *[, match_acc])	Compute a relative key by specifying the target mode.

Attributes

`accidentals`	A dictionary of accidentals in the key signature, mapping natural note names to the accidental applied.
`intervals`	List of the intervals that compose the scale.
`key_signature`	List of accidentals that should be displayed in the key signature for the given key description.
`mode`	Full mode name (e.g., `Major`).
`relative_major`
`relative_minor`
`scale`	Notes (pitch classes) of the scale.
`scale_chromatic_values`	Integer chromatic values that make up the scale, relative to the tonic.
`scale_degrees_wrt_major`	Scale degrees of the mode's scale, with #/b as compared to the major scale with the same tonic.
`tonic`	The tonic of the key.