Add titles to charts

candlestick_chart.py

@@ -5,12 +5,21 @@ from typing import List
 
 class CandlestickChart(Chart):
 
-    def __init__(self, x: Series, opens: Series, highs: Series, lows: Series, closes: Series):
+    def __init__(
+            self, 
+            x: Series, 
+            opens: Series, 
+            highs: Series, 
+            lows: Series, 
+            closes: Series,
+            title: str = ''
+        ):
         self.x = x
         self.opens = opens
         self.highs = highs
         self.lows = lows
         self.closes = closes
+        self.title = title
 
     def traces(self) -> List[Candlestick]:
         return [Candlestick(

candlestick_chart_example.py

@@ -13,6 +13,7 @@ candlestick_chart = CandlestickChart(
     opens = data['Open'], 
     highs = data['High'], 
     lows = data['Low'], 
-    closes = data['Close']
+    closes = data['Close'],
+    title = 'SPX'
 )
 plot(candlestick_chart)

chart.py

@@ -5,6 +5,7 @@ from typing import List
 class Chart:
 
     x: Series = None
+    title: str = None
 
     def traces(self) -> List[BaseTraceType]:
         pass

line_chart.py

@@ -5,9 +5,10 @@ from typing import List
 
 class LineChart(Chart):
 
-    def __init__(self, x: Series, values: List[Series]):
+    def __init__(self, x: Series, values: List[Series], title: str = ''):
         self.x = x
         self.values = values
+        self.title = title
 
     def traces(self) -> List[Scatter]:
         traces = []

line_chart_example.py

@@ -10,6 +10,7 @@ data = ohlc('SPX.XO', '1d', start_date = start_date, end_date = end_date)
 
 line_chart = LineChart(
     x = data['Timestamp'], 
-    values = [data['Close']]
+    values = [data['Close']],
+    title = 'SPX (Close)'
 )
 plot(line_chart)

multi_line_chart_example.py

@@ -10,6 +10,7 @@ data = ohlc('SPX.XO', '1d', start_date = start_date, end_date = end_date)
 
 line_chart = LineChart(
     x = data['Timestamp'], 
-    values = [data['High'], data['Low']]
+    values = [data['High'], data['Low']],
+    title = 'SPX (High, Low)'
 )
 plot(line_chart)

plot.py

@@ -3,11 +3,18 @@ from plotly.graph_objects import Figure
 from plotly.subplots import make_subplots
 from typing import List
 
+def subplot_titles(subplots: List[List[Chart]]) -> List[str]:
+    subplot_titles = []
+    for row in subplots:
+        for chart in row:
+            subplot_titles.append(chart.title)
+    return subplot_titles
+
 def figure_with_subplots(subplots: List[List[Chart]]) -> Figure:
     num_rows = len(subplots)
     num_columns = len(subplots[0])
     
-    figure = make_subplots(rows = num_rows, cols = num_columns)
+    figure = make_subplots(rows = num_rows, cols = num_columns, subplot_titles = subplot_titles(subplots))
 
     for i, row in enumerate(subplots, start = 1):
         for j, chart in enumerate(row, start = 1):