Python编程-从入门到实践第15章课后习题详解

第15章

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使用Plotly模拟掷骰子——课后习题答案

练习15-6

#掷两个D8
from plotly.graph_objs import Bar,Layout
from plotly import offline
from Die import Die
die_1 = Die(8)
die_2 = Die(8)
results = []
for roll_num in range(50000):
    result = die_1.roll() + die_2.roll()
    results.append(result)
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)
x_values = list(range(2,max_result+1))
data = [Bar(x=x_values,y=frequencies)]
x_axis_config = {'title':'结果','dtick':1}#dtick键指定x轴显示的刻度间距
y_axis_config = {'title':'结果的频率'}
my_layout = Layout(title = '掷两个D8的结果',xaxis=x_axis_config,yaxis=y_axis_config)
offline.plot({'data':data,'layout':my_layout},filename = 'd8_d8.html')

练习15-7

#掷三个D6
from plotly.graph_objs import Bar,Layout
from plotly import offline
from Die import Die
die_1 = Die()
die_2 = Die()
die_3 = Die()
results = []
for roll_num in range(5000):
    result = die_1.roll() + die_2.roll() + die_3.roll()
    results.append(result)
frequencies = []
max_result = die_1.num_sides + die_2.num_sides + die_3.num_sides
for value in range(3,max_result+1):
    frequency = results.count(value)
    frequencies.append(frequency)
x_values = list(range(3,max_result+1))
data = [Bar(x=x_values,y=frequencies)]
x_axis_config = {'title':'结果','dtick':1}#dtick键指定x轴显示的刻度间距
y_axis_config = {'title':'结果的频率'}
my_layout = Layout(title = '掷三个D6的结果',xaxis=x_axis_config,yaxis=y_axis_config)
offline.plot({'data':data,'layout':my_layout},filename = 'd6_d6_d6.html')

练习15-8

#将两个骰子点数相乘
from plotly.graph_objs import Bar,Layout
from plotly import offline
from Die import Die
die_1 = Die()
die_2 = Die()
results = []
for roll_num in range(5000):
    result = die_1.roll() * die_2.roll()
    results.append(result)
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)
x_values = list(range(1,max_result+1))
data = [Bar(x=x_values,y=frequencies)]
x_axis_config = {'title':'结果','dtick':1}#dtick键指定x轴显示的刻度间距
y_axis_config = {'title':'结果的频率'}
my_layout = Layout(title = '掷两个D6的结果',xaxis=x_axis_config,yaxis=y_axis_config)
offline.plot({'data':data,'layout':my_layout},filename = 'd6_d6.html')

练习15-9

#列表解析
#掷两个D8
from plotly.graph_objs import Bar,Layout
from plotly import offline
from Die import Die
die_1 = Die(8)
die_2 = Die(8)
results = []
for roll_num in range(50000):
    result = die_1.roll() + die_2.roll()
    results.append(result)
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)

results_count = [results.count(value) for value in range(2,max_result+1)]
frequencies = [frequency for frequency in results_count]

x_values = list(range(2,max_result+1))
data = [Bar(x=x_values,y=frequencies)]
x_axis_config = {'title':'结果','dtick':1}#dtick键指定x轴显示的刻度间距
y_axis_config = {'title':'结果的频率'}
my_layout = Layout(title = '掷两个D8的结果',xaxis=x_axis_config,yaxis=y_axis_config)
offline.plot({'data':data,'layout':my_layout},filename = 'd8_d8.html')