Add source example files

source/plotting/plotly-barcolors.py

@@ -0,0 +1,10 @@
+import pandas as pd
+from plotly import express as px
+
+data = pd.DataFrame(data={
+    "product": ["pomme", "poire", "banane", "pêche"],
+    "price": [1.99, 2.49, 2.99, 3.49], "wpu": [200, 180, 140, 200]
+})
+figure = px.bar(data, y="price", x="product", title="Prix", color="price", color_continuous_scale=["red", "orange", "yellow", "#8F0"])
+figure.layout.update({"template": "seaborn", "title": "Prix au kilo", "font": {"family": "Cabin", "size": 13}})
+figure.show()