Initialize chart options

def _chart(self, x, y, chart_type, opts, style, label, options, **kwargs):
		"""
		Initialize chart options
		"""
		if opts is not None:
			self.chart_opts = opts
		if style is not None:
			self.chart_style = style
		if label is not None:
			self.label = label
		self.x = x
		self.y = y
		if chart_type is None:
			return
		try:
			chart_obj = self._get_chart(chart_type, x, y, style=style,
										opts=opts, label=label,
										options=options, **kwargs)
			return chart_obj
		except Exception as e:
			self.err(e)