7. Bokeh

7.1. Installation

$ pip install bokeh

7.2. Download Sample Data

import bokeh
bokeh.sampledata.download()

7.3. Charts

7.3.1. Box Chart

Code Listing 7.13. Box Chart
from math import pi

import pandas as pd

from bokeh.plotting import figure, show, output_file
from bokeh.sampledata.stocks import MSFT

df = pd.DataFrame(MSFT)[:50]
df["date"] = pd.to_datetime(df["date"])

inc = df.close > df.open
dec = df.open > df.close
w = 12 * 60 * 60 * 1000  # half day in ms

TOOLS = "pan,wheel_zoom,box_zoom,reset,save"

p = figure(x_axis_type="datetime", tools=TOOLS, plot_width=1000, title="MSFT Candlestick")
p.xaxis.major_label_orientation = pi / 4
p.grid.grid_line_alpha = 0.3

p.segment(df.date, df.high, df.date, df.low, color="black")
p.vbar(df.date[inc], w, df.open[inc], df.close[inc], fill_color="#D5E1DD", line_color="black")
p.vbar(df.date[dec], w, df.open[dec], df.close[dec], fill_color="#F2583E", line_color="black")

output_file("candlestick.html", title="candlestick.py example")

show(p)  # open a browser