view.py 文件源码

def __init__(self, width, height, box, aperture=pi / 3):
        """Create the view with a width an height and a box bounds"""
        super(PolarThetaLogView, self).__init__(width, height, box)
        self.aperture = aperture
        if not hasattr(box, '_tmin') or not hasattr(box, '_tmax'):
            raise Exception(
                'Box must be set with set_polar_box for polar charts')
        self.log10_tmax = log10(self.box._tmax) if self.box._tmax > 0 else 0
        self.log10_tmin = log10(self.box._tmin) if self.box._tmin > 0 else 0
        if self.log10_tmin == self.log10_tmax:
            self.log10_tmax = self.log10_tmin + 1