import time
from numpy import exp, linspace, pi, sin
from bokeh.document import Document
from bokeh.embed import file_html
from bokeh.models import (ColumnDataSource, DatetimeAxis,
PanTool, Plot, Scatter, WheelZoomTool)
from bokeh.util.browser import view
N = 200
x = linspace(-2 * pi, 2 * pi, N)
y = sin(x)*exp(-x)
# Create an array of synthetic times, starting at the current time, and extending 24hrs
times = (linspace(0, 24*3600, N) + time.time()) * 1000
source = ColumnDataSource(data=dict(x=x, y=y, times=times))
plot = Plot(min_border=80, width=800, height=350, background_fill_color="#efefef")
scatter = Scatter(x="times", y="y", fill_color="red", size=3, line_color=None, fill_alpha=0.5)
plot.add_glyph(source, scatter)
plot.add_layout(DatetimeAxis(), 'below')
plot.add_layout(DatetimeAxis(), 'left')
plot.add_tools(PanTool(), WheelZoomTool(zoom_on_axis=False, speed=1/5000.))
doc = Document()
doc.add_root(plot)
if __name__ == "__main__":
doc.validate()
filename = "dateaxis.html"
with open(filename, "w") as f:
f.write(file_html(doc, title="Date Axis Example"))
print(f"Wrote {filename}")
view(filename)
