05_17selfcheck.py

# Section 5.17.2 Self Check snippets

# Exercise 5
plt.cla()

%recall 5

rolls = [random.randrange(1, 7) for i in range(6000000)]

%recall 6-13

values, frequencies = np.unique(rolls, return_counts=True)
title = f'Rolling a Six-Sided Die {len(rolls):,} Times'
sns.set_style('whitegrid')
axes = sns.barplot(values, frequencies, palette='bright')
axes.set_title(title)
axes.set(xlabel='Die Value', ylabel='Frequency')  
axes.set_ylim(top=max(frequencies) * 1.10)
for bar, frequency in zip(axes.patches, frequencies):
    text_x = bar.get_x() + bar.get_width() / 2.0  
    text_y = bar.get_height() 
    text = f'{frequency:,}\n{frequency / len(rolls):.3%}'
    axes.text(text_x, text_y, text, 
              fontsize=11, ha='center', va='bottom')
              

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