ax = df_13_14_target[['month', '2014_target_val']].plot(x='month',
    linestyle='-', marker='o')
df_13_14_target[['month', '2013_val', '2014_val']].plot(x='month', kind=
    'bar', ax=ax)
plt.show()
Plot Pandas DataFrame as Bar and Line on the same one chart