《Python编程从入门到实践》项目2: 数据可视化15.4使用Pygal模拟掷骰子

from random import randint
import pygal


class Die():

    def __init__(self, num_sides=6):
        """骰子默认为6面"""
        self.num_sides = num_sides

    def roll(self):
        """返回一个位于1和骰子面数之间的随机值"""
        return randint(1, self.num_sides)


# 创建两个不同面得骰子
die_1 = Die()
die_2 = Die(10)

results = []
for roll_num in range(10000):
    result = die_1.roll() + die_2.roll()
    results.append(result)

# 分析结果, 计算每个结果出现的次数
frequencies = []
max_result = die_1.num_sides + die_2.num_sides
for value in range(1, max_result+1):
    frequency = results.count(value)
    frequencies.append(frequency)

hist = pygal.Bar()
hist.title = "Results of rolling a D6 and a D10 10000 times"
hist.x_labels = [result for result in range(2, max_result+1)]
hist.x_title = "Result"
hist.y_title = "Frequency of Result"

# 传递值得标签以及将出现在图表中得值得列表
hist.add("D6+D10", frequencies)

hist.render_to_file("die_visual.svg")