def __init__(self, root_symbol=None, function='T', root_number=None):
"""
Either root_symbol or root_number must be given.
Will raise a ChordError if the root symbol can't be interpreted
as a root number.
@type root_symbol: string
@param root_symbol: symbol to interpret as the root of this
category. This will be converted to a root number.
@type function: string or list of strings
@param function: either a single function marker (usually
'T', 'D' and 'S') or a list of such function markers,
as in the case of a complex category's argument.
@type root_number: int
@param root_number: alternative to setting the root by a
symbol. This will be used in preferance to root_symbol if
given.
"""
if root_number is not None:
# This is already a numeric root
self.root = root_number
elif root_symbol is not None:
try:
# Try treating this as a chord root
self.root = chord_numeral_to_int(root_symbol, strict=True)
except ChordError, err:
raise ChordError, "could not treat '%s' as a root "\
"symbol: %s" % (root_symbol, err)
def __init__(self, root_symbol=None, function='T', root_number=None):
"""
Either root_symbol or root_number must be given.
Will raise a ChordError if the root symbol can't be interpreted
as a root number.
@type root_symbol: string
@param root_symbol: symbol to interpret as the root of this
category. This will be converted to a root number.
@type function: string or list of strings
@param function: either a single function marker (usually
'T', 'D' and 'S') or a list of such function markers,
as in the case of a complex category's argument.
@type root_number: int
@param root_number: alternative to setting the root by a
symbol. This will be used in preferance to root_symbol if
given.
"""
if root_number is not None:
# This is already a numeric root
self.root = root_number
elif root_symbol is not None:
try:
# Try treating this as a chord root
self.root = chord_numeral_to_int(root_symbol, strict=True)
except ChordError, err:
raise ChordError, "could not treat '%s' as a root "\
"symbol: %s" % (root_symbol, err)
def _set_root_numeral(self, value):
if self.roman:
self._root = chord_numeral_to_int(value)
else:
self._root = pitch_class_to_int(value)
