import matplotlib.pyplot as plt

class Graph:
	def __init__(self, **kwargs):
		self.f = plt.figure()
		self.ax = self.f.add_subplot(111)
		self.line = None

	def draw_variable(self, x, y):
		self.x = x
		self.y = y
		self.ax.scatter(x, y)
		plt.ion()
		plt.show()

	def draw_line(self, x, y):
		if self.line is not None:
			self.line.remove()
		self.line = plt.Line2D(x, y, color='r')
		self.ax.add_line(self.line)
		plt.draw()
		plt.pause(0.000000001)