def __init__(self, frames=None):
    if (not frames):
        frames = []
    rows = [Frame(*frame) for frame in frames]
    self._rows = rows
    self.changed = False
def __init__(self, frames=None):
    if (not frames):
        frames = []
    rows = [Frame(*frame) for frame in frames]
    self._rows = rows
    self.changed = False