Bokeh simple histogram

gistfile1.py

from __future__ import print_function

import uuid
import time
from datetime import datetime
fts = datetime.fromtimestamp
from webbrowser import open_new_tab
from random import randint

from requests.exceptions import ConnectionError

from bokeh.document import Document
from bokeh.session import Session
from bokeh.widgetobjects import *
from bokeh.objects import  DataRange1d, ColumnDataSource, Plot, LinearAxis, Glyph, Grid, DatetimeAxis
from bokeh.glyphs import Quad

document = Document()
session = Session(load_from_config=False)
docname = str(uuid.uuid4())
session.use_doc(docname)
session.load_document(document)

data = {
    'l': range(0,1000),
    'r': range(1,1001),
    'b': [0]*1000,
    'y': [randint(0,1000) for i in range(1000)]
}

cols = ['l', 'r', 'b', 'y']
source = ColumnDataSource(
    data=data,
    column_names=cols
)

def update_data():
    source.data = data
    session.store_document(document)

def _plot():
    xdr = DataRange1d(sources=[source.columns(c) for c in ['l','r']])
    ydr = DataRange1d(sources=[source.columns('y')])

    plot = Plot(data_sources=[source],
		x_range=xdr,
		y_range=ydr,
		title=None,
		min_border=0,
		plot_width=2000,
		plot_height=1000)

    quad_renderer = Glyph(data_source=source,
                          xdata_range=xdr,
                          ydata_range=ydr,
                          glyph=quad)
    plot.renderers.append(quad_renderer)

    '''
    xaxis = LinearAxis(plot=plot,
                       location='bottom',
		       dimension=0)
    xgrid = Grid(plot=plot,
                 dimension=0,
                 axis=xaxis)
    yaxis = LinearAxis(plot=plot,
                       location='left',
                       dimension=1)
    ygrid = Grid(plot=plot,
                 dimension=1,
                 axis=yaxis)
    '''
    return plot

def layout():
    return _plot()

document.add(layout())
update_data()

if __name__ == "__main__":
    link = session.object_link(document._plotcontext)
    open_new_tab(link)
    try:
        while True:
            session.load_document(document)
            time.sleep(0.5)
    except KeyboardInterrupt:
        print()
    except ConnectionError:
	print("Connection to bokeh-server was terminated")