[] Bokeh, Flask Python 3 |
python digest Flask+Bokeh. , Python HTML. Ubuntu 16.04, Windows .
Bokeh , -, javascript. d3.js , Python, .
Bokeh , .
, Flask Bokeh -.
, , Python 2, Python 3, , Python 3 . Python 3.6.1 . Python, :
. , venvs, .
python3 -m venv barchart.
source barchart/bin/activate :
, , .
Bokeh Flask . , Bokeh Flask .
pip install bokeh==0.12.5 flask==0.12.2 pandas==0.20.1. , , .
Installing collected packages: six, requests, PyYAML, python-dateutil, MarkupSafe, Jinja2, numpy, tornado, bokeh, Werkzeug, itsdangerous, click, flask, pytz, pandas
Running setup.py install for PyYAML ... done
Running setup.py install for MarkupSafe ... done
Running setup.py install for tornado ... done
Running setup.py install for bokeh ... done
Running setup.py install for itsdangerous ... done
Successfully installed Jinja2-2.9.6 MarkupSafe-1.0 PyYAML-3.12 Werkzeug-0.12.2 bokeh-0.12.5 click-6.7 flask-0.12.2 itsdangerous-0.24 numpy-1.12.1 pandas-0.20.1 python-dateutil-2.6.0 pytz-2017.2 requests-2.14.2 six-1.10.0 tornado-4.5.1.
Flask- .
app.py :
from flask import Flask, render_template
app = Flask(__name__)
@app.route("//")
def chart(bars_count):
if bars_count <= 0:
bars_count = 1
return render_template("chart.html", bars_count=bars_count)
if __name__ == "__main__":
app.run(debug=True) Flask-, chart. chart , . render_template chart Jinja2 HTML.
2 5000 . , WSGI- Gunicorn.
templates . chart.html. chart app.py, . chart.html Jinja2-.
Bugs found over the past {{ bars_count }} days
chart.html , chart URL.
h1 . , .
.
, app.py. app.py python.
$(barchart) python app.py localhost:5000/16/. , , URL.
, . .
, Bokeh.
app.py .
import random
from bokeh.models import (HoverTool, FactorRange, Plot, LinearAxis, Grid,
Range1d)
from bokeh.models.glyphs import VBar
from bokeh.plotting import figure
from bokeh.charts import Bar
from bokeh.embed import components
from bokeh.models.sources import ColumnDataSource
from flask import Flask, render_template Bokeh random .
. !
app.py. .
app = Flask(__name__)
@app.route("//")
def chart(bars_count):
if bars_count <= 0:
bars_count = 1
data = {"days": [], "bugs": [], "costs": []}
for i in range(1, bars_count + 1):
data['days'].append(i)
data['bugs'].append(random.randint(1,100))
data['costs'].append(random.uniform(1.00, 1000.00))
hover = create_hover_tool()
plot = create_bar_chart(data, "Bugs found per day", "days",
"bugs", hover)
script, div = components(plot)
return render_template("chart.html", bars_count=bars_count,
the_div=div, the_script=script) chart random.
chart 2 : create_hover_tool create_bar_chart. , chart:
def create_hover_tool():
#
return None
def create_bar_chart(data, title, x_name, y_name, hover_tool=None,
width=1200, height=300):
""" .
, ,
.
"""
source = ColumnDataSource(data)
xdr = FactorRange(factors=data[x_name])
ydr = Range1d(start=0,end=max(data[y_name])*1.5)
tools = []
if hover_tool:
tools = [hover_tool,]
plot = figure(title=title, x_range=xdr, y_range=ydr, plot_width=width,
plot_height=height, h_symmetry=False, v_symmetry=False,
min_border=0, toolbar_location="above", tools=tools,
responsive=True, outline_line_color="#666666")
glyph = VBar(x=x_name, top=y_name, bottom=0, width=.8,
fill_color="#e12127")
plot.add_glyph(source, glyph)
xaxis = LinearAxis()
yaxis = LinearAxis()
plot.add_layout(Grid(dimension=0, ticker=xaxis.ticker))
plot.add_layout(Grid(dimension=1, ticker=yaxis.ticker))
plot.toolbar.logo = None
plot.min_border_top = 0
plot.xgrid.grid_line_color = None
plot.ygrid.grid_line_color = "#999999"
plot.yaxis.axis_label = "Bugs found"
plot.ygrid.grid_line_alpha = 0.1
plot.xaxis.axis_label = "Days after app deployment"
plot.xaxis.major_label_orientation = 1
return plot , . create_hover_tool None, .
create_bar_chart ColumnDataSource, Bokeh . x y.
, tools . figure. : , , , .
VBar add_glyph, , .
2 . Bokeh plot.toolbar.logo = None . bokeh.plotting , , .
templates/chart.html, . .
Bugs found over the past {{ bars_count }} days
{{ the_div|safe }}
{{ the_script|safe }}
2 6 CSS- Bokeh, 2 , 2 .
, . Flask , app.py. -, python app.py.
localhost:5000/4/.
, 16, /localhost:5000/16/.
4 ...
. , , ? , create_hover_tool.
app.py create_hover_tool
def create_hover_tool():
"""Generates the HTML for the Bokeh's hover data tool on our graph."""
hover_html = """
$x
@bugs bugs
$@costs{0.00}
"""
return HoverTool(tooltips=hover_html) HTML Python , . $x, x- , @bugs, "bugs" $@costs{0.00}, "costs" 2 .
, return None return HoverTool(tooltips=hover_html).
localhost:5000/128/.
! URL .
100 , . 50,000 :
, , -, .
Bokeh. , , , .
Bokeh , , GitHub, Bokeh Full Stack Python.
? GitHub Twitter @fullstackpython @mattmakai.
