added an example from v3

“mahdis-z” · “mahdis-z” · commit 1e623717e676 · 2019-11-01T13:25:21.000-04:00
diff --git a/python/hover-text-and-formatting.md b/python/hover-text-and-formatting.md
@@ -110,6 +110,33 @@ To customize the tooltip on your graph you can use [hovertemplate](https://plot.
 This template string can include `variables` in %{variable} format, `numbers` in [d3-format's syntax](https://github.com/d3/d3-3.x-api-reference/blob/master/Formatting.md#d3_forma), and `date` in [d3-time-fomrat's syntax](https://github.com/d3/d3-3.x-api-reference/blob/master/Time-Formatting.md#format).
 Hovertemplate customize the tooltip text vs. [texttemplate](https://plot.ly/python/reference/#pie-texttemplate) which customizes the text that appears on your chart. 
 
+```python
+import plotly.graph_objs as go
+import plotly.io as pio
+
+fig = go.Figure(go.Scatter(
+    x = [1,2,3,4,5],
+    y = [2.02825,1.63728,6.83839,4.8485,4.73463],
+    hovertemplate = 
+    '<i>Price</i>: $%{y:.2f}'+
+    '<br><b>X</b>: %{x}<br>'+
+    '<b>%{text}</b>',
+    text = ['Custom text {}'.format(i + 1) for i in range(5)],
+    showlegend = False))
+
+fig.add_trace(go.Scatter(
+    x = [1,2,3,4,5],
+    y = [3.02825,2.63728,4.83839,3.8485,1.73463],
+    hovertemplate = 'Price: %{y:$.2f}<extra></extra>',
+    showlegend = False))
+
+fig.update_layout(
+    title = "Set hover text with hovertemplate",
+    template = pio.templates['plotly'])
+
+fig.show()
+```
+
 ```python
 import plotly.graph_objects as go
 
@@ -124,7 +151,9 @@ fig = go.Figure(go.Pie(
 fig.show()
 ```
 
-### Format Hover Template
+### Advanced Hover Template
+### Advanced Hover Template
+The following example shows how to format hover template. [Here](https://plot.ly/python/v3/hover-text-and-formatting/#dash-example) is an example to see how to format hovetemplate in Dash.
 
 ```python
 import plotly.graph_objects as go
