title: Plot multiple time series from a dataframe
body: <p><em>I want to plot sales in Y axe and time in X axe. One line per each car model. I managed to plot one line for the total sales. Any suggestions to get lines for each car model?</em></p>
  <pre><code>cars = {&quot;Date&quot; : [&quot;2020-01-29&quot;, &quot;2020-01-02&quot;, &quot;2020-01-24&quot;, &quot;2020-05-21&quot;, &quot;2020-12-31&quot;, &quot;2020-12-01&quot;, &quot;2020-12-01&quot;],
      &quot;Brand&quot;: [&quot;Honda Civic&quot;,&quot;Toyota Corolla&quot;,&quot;Honda Civic&quot;, &quot;Ford Focus&quot;,&quot;Audi A4&quot;, &quot;Ford Focus&quot;, &quot;Ford Focus&quot;],
      &quot;Price&quot;: [22000,25000,22000,27000,35000,27000,27000]
      }
  df2 = pd.DataFrame(cars, columns = [&quot;Date&quot;, &quot;Brand&quot;, &quot;Price&quot;])
  df2[&quot;Date&quot;] =  pd.to_datetime(df2[&quot;Date&quot;])
  df2=df2.sort_values(by=&quot;Date&quot;)
  df2.index = df2[&quot;Date&quot;]
  gb2=df2.groupby([df2.index.year.values,df2.index.month.values,df2.index.day.values]).sum()
  gb2.plot.line()
  plt.show()
  </code></pre>