spotify#80 resolution

I fixed the issue users were having of not being able to display column totals onto bar stacked graphs I did this in a very non-intrusive way by using different charting functions and various panda library calls to slice the data frame add each individual fruit together then add it back into the datagram and set the totals into a subtitle

examples/barStackedTest.py

@@ -0,0 +1,69 @@
+import numpy as np
+import pandas as pd
+import chartify
+
+data = chartify.examples.example_data()
+
+quantity_by_fruit_and_country = (data.groupby(
+    ['fruit', 'country'])['quantity'].sum().reset_index())
+
+country_order = (
+    quantity_by_fruit_and_country.groupby('country')['quantity'].sum()
+        .sort_values(ascending=False).index)
+
+quantity_by_fruit_and_country['label'] = np.where(
+    quantity_by_fruit_and_country['fruit'].isin(['Banana', 'Orange', 'Grape', 'Apple']),
+    quantity_by_fruit_and_country['quantity'],
+    None)
+
+# apple total=608
+apples = quantity_by_fruit_and_country[quantity_by_fruit_and_country['fruit'] == "Apple"]
+appleQuantity = apples['quantity']
+appleTotal = appleQuantity.sum()
+
+banana = quantity_by_fruit_and_country[quantity_by_fruit_and_country['fruit'] == "Banana"]
+bananaQuantity = banana['quantity']
+bananaTotal = bananaQuantity.sum()
+
+grape = quantity_by_fruit_and_country[quantity_by_fruit_and_country['fruit'] == "Grape"]
+grapeQuantity = grape['quantity']
+grapeTotal = grapeQuantity.sum()
+
+orange = quantity_by_fruit_and_country[quantity_by_fruit_and_country['fruit'] == "Orange"]
+orangeQuantity = orange['quantity']
+orangeTotal = orangeQuantity.sum()
+
+# print(quantity_by_fruit_and_country)
+quantity_by_fruit_and_country.insert(4, "fruit total", [appleTotal, None, None, None, None,
+                                                        bananaTotal, None, None, None, None,
+                                                        grapeTotal, None, None, None, None,
+                                                        orangeTotal, None, None, None, None], False)
+
+ch = chartify.Chart(blank_labels=True, x_axis_type='categorical')
+ch.set_title("Grouped bar chart - Ordered stack")
+ch.set_subtitle("Banana Total: " + str(bananaTotal) +
+                " Orange Total: " + str(orangeTotal) +
+                " Apple Total: " + str(appleTotal) +
+                " Grape Total: " + str(grapeTotal))
+ch.plot.bar_stacked(
+    data_frame=quantity_by_fruit_and_country,
+    categorical_columns=['fruit'],
+    numeric_column='quantity',
+    stack_column='country',
+    normalize=False,
+    stack_order=country_order)
+
+ch.plot.text_stacked(
+    data_frame=quantity_by_fruit_and_country,
+    categorical_columns=['fruit'],
+    numeric_column='quantity',
+    stack_column='country',
+    text_column='label',
+    normalize=False,
+    stack_order=country_order,
+    # Set the text color otherwise it will take
+    # The next color in the color palette.
+    text_color='white'
+)
+
+ch.show('html')