python入门-直方图

使用的是pygal函数库 因此须要先安装

1 安装库文件

pip install pygal=1.7

 

2 建立骰子类

from random import randint

class Die():
    #表示一个骰子的类
    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数
        return randint(1, self.num_sides)

3 2个不一样面的骰子成的直方图

import pygal
from die import Die

#建立1个D6和一个D10
die_1 = Die()
die_2 = Die(10)

#投掷几回骰子，把结果存储在列表中
results = []
for roll_num in range(50000):
    result=die_1.roll() + die_2.roll()
    results.append(result)

#结果分析
frequencies = []
max_result = die_1.num_sides + die_2.num_sides
for value in range(2, max_result):
    frequencie = results.count(value)
    frequencies.append(frequencie)

#对结果进行可视化
hist = pygal.Bar()

hist.title = "Results of rolling one D6 and one D10 50000 times"
hist.x_labels = ['2','3','4','5','6','7','8','9','10','11','12','13','14','15','16']
hist.x_title = "Result"
hist.y_title = "Frequency of Result"

hist.add("D6 + D10", frequencies)
hist.render_to_file('different_visual.svg')

 

4 结果实例