Python pandas plot is a no-show
Question: When I run this code

    
    
    import pandas as pd
    import numpy as np
    def add_prop(group):
        births = group.births.astype(float)
        group['prop'] = births/births.sum()
        return group
    
    pieces = []
    columns = ['name', 'sex', 'births']
    
    for year in range(1880, 2012):
        path = 'yob%d.txt' % year
        frame = pd.read_csv(path, names = columns)
        frame['year'] = year
        pieces.append(frame)
        names = pd.concat(pieces, ignore_index = True)
    
    total_births = names.pivot_table('births', rows = 'year', cols = 'sex', aggfunc = sum)
    total_births.plot(title = 'Total Births by sex and year')
    

I get no plot. This is from Wes McKinney's book on using Python for data
analysis. Can anyone point me in the right direction?


Answer: Put

    
    
    import matplotlib.pyplot as plt
    

at the top, and

    
    
    plt.show()
    

at the end.

