from random import randint
import pygal


class Die():

	def __init__(self, num_sides=6):
		self.num_sides = num_sides
		#如果不传入参数就是6面

	def roll(self):
		return randint(1,self.num_sides)#1-num_sides

die_1 = Die()
die_2 = Die()



results = []
for roll_num in range(1000):#0-999一共1000个
	result = die_1.roll() + die_2.roll()
	results.append(result)

#分析结果
frequencies = []
max_result = die_1.num_sides + die_2.num_sides
for value in range(2, max_result + 1):
	#从1到max_result
	frequency = results.count(value)
	#直接统计元素数量
	frequencies.append(frequency)
#创建一个pygal.Bar实例
hist = pygal.Bar()

hist.title = "Results of rolling two D6 dice 1000 times"

hist.x_labels = ['2','3','4','5','6','7','8','9','10','11','12']
hist.x_title = "Results"
hist.y_title = "Frequency of Result"

hist.add('D6 + D6', frequencies)
#渲染成svg文件
hist.render_to_file('dice_visual.svg')