python 数据统计之pygal

python 数据统计之pygal

1，die.py定义骰子类，模拟每次掷出不同点数

from random import randint
class Die():
    def __init__(self, num_sides=6):
        self.num_sides = num_sides
    def roll(self):
        return randint(1, self.num_sides)

2，模拟同时掷出两个骰子时的点数统计信息，并统计不同点数出现的次数，然后绘制直方图

引用pygal包和Die类，将直方图保存到文件中。

from die import Die
import pygal
die_1 = Die()
die_2 = Die()
results = []
for roll_num in range(1000):
    result = die_1.roll() + die_2.roll()
    results.append(result)

print(results)
frequencies = []
max_result = die_1.num_sides + die_2.num_sides
for value in range(2, max_result+1):
    frequency = results.count(value)
    frequencies.append(frequency)

print(frequencies)
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 = "Result"
hist.y_title = "Frequency of Result"
hist.add('D6+D6', frequencies)
hist.render_to_file('dice_visual.svg')

来源：oschina

链接：https://my.oschina.net/donngchao/blog/3162915