Add files to reproduce plotly bug

Reproduction of plotly/plotly.js#4729

Author: AdamDorwart

appl_bug.pkl

@@ -0,0 +1,51 @@
+from datetime import datetime
+
+import pandas as pd
+
+import plotly.graph_objects as go
+import dash
+import dash_core_components as dcc
+import dash_html_components as html
+from dash.dependencies import Input, Output
+
+df = pd.read_pickle("./appl_bug.pkl")
+
+start_date = df.index.min()
+end_date = df.index.max()
+
+def get_figure(df, start_date, end_date):
+    mask = (df.index >= start_date) & (df.index <= end_date)
+    df_filt = df[mask]
+
+    data = go.Candlestick(x=df_filt.index,
+                    open=df_filt['Open'],
+                    high=df_filt['High'],
+                    low=df_filt['Low'],
+                    close=df_filt['Close'])
+    
+    return go.Figure(data=data)
+
+app = dash.Dash()
+app.layout = html.Div([
+    dcc.DatePickerRange(
+        id="ohlc-dates",
+        start_date=start_date,
+        end_date=end_date,
+        display_format='M-D-Y',
+    ),
+    dcc.Graph(
+        id="ohlc", 
+        figure=get_figure(df, start_date, end_date),
+    )
+])
+
+@app.callback(
+    Output("ohlc", "figure"),
+    [Input("ohlc-dates", "start_date"),
+    Input("ohlc-dates", "end_date")]
+)
+def update_dates(start_date, end_date):
+    global df
+    return get_figure(df, start_date, end_date)
+
+app.run_server(debug=True)