pyviz/pyviz

For questions, use https://discourse.holoviz.org/ instead! This chat is for informal discussions and debugging sessions with developers of the HoloViz.org tools (HoloViews, Datashader, Panel, hvPlot, GeoViews, Param, etc.), but user questions should go to the HoloViz Discourse site so that others won't have to ask them again.

Jean-Luc Stevens

@jlstevens

@MarcSkovMadsen Just in case you don't know this already but we are making some progress on getting panel/holoviz to work in the VSCode notebook environment.

Marc Skov Madsen

@MarcSkovMadsen

I'm trying to setup authentication with Azure AD and it works. But how do I get_user inside my Panel application? I can find the "user" cookie. But this is a secure cookie. How would i decrypt that or get access to get_user from within Panel? @philippfr?

Thanks @jlstevens

Marc Skov Madsen

@MarcSkovMadsen

FYI. Holoviz, Streamlit and awesome-anel.org is discussed on this weeks edition of Python Bytes. https://pythonbytes.fm/episodes/show/181/it-s-time-to-interrogate-your-python-code

What happened to font awesome in Panel @philippjfr ? I believe there was a PR. But now i cannot find it anywhere.

Philipp Rudiger

@philippjfr

The PR is still open. I didn't find a way to bundle the css I liked so haven't picked it up again yet.

Marc Skov Madsen

@MarcSkovMadsen

Hmm. Dash Datashader? https://medium.com/rapids-ai/plotly-census-viz-dashboard-powered-by-rapids-1503b3506652

https://medium.com/plotly/plotly-and-nvidia-partner-to-integrate-dash-and-rapids-8a8c53cd7daf

Marc Skov Madsen

@MarcSkovMadsen

Wow https://medium.com/plotly/introducing-jupyterdash-811f1f57c02e

sameerCoder

@sameerCoder

Hello Every1,
I have made the bokeh application and its running fine on my local system,
I want to deploy my bokeh application on my own server ?
how i can do the deploy of my bokeh application deployment on my own server

@allkindly provide me some guidelines to make my bokeh application deploy on my own server , so that i can use my bokeh application dynamically.
Thank you.

Marc Skov Madsen

@MarcSkovMadsen

Regarding Bokeh the best place to ask user questions is in the Bokeh forum. See https://discourse.bokeh.org/. But see also https://docs.bokeh.org/en/latest/docs/user_guide/server.html

sameerCoder

@sameerCoder

Thank @MarcSkovMadsen
i will see .

Maxime Liquet

@maximlt

Just listened to the Python Bytes episode you mentioned @MarcSkovMadsen, it seems like we did a good job at advertising Holoviz :D !

sameerCoder

@sameerCoder

Hi All,
Kindly let me know how to solve this embedding plot in flask Error:-

from flask import Flask, render_template
from werkzeug.wrappers import Request,Response

app=Flask(_name_)

@app.route('/plot/')
def plot():
    from shapely.geometry import Point,Polygon
    import pandas as pd
.......
.......
......
......
......
    dd=df_div.opts(width=70, height=70)
    dd1=df_div1.opts(width=600, height=90)



    finalplot=pn.Column(pn.Row(dd, dd1), tiles*rasterize(hmap1).options(**opts)*hmap2*logo1.opts(hooks=[absolute_position], apply_ranges=False)).servable()
    #print("--- %s seconds ---" % (time.time() - strtt))
    #finalplot



    script1, div1 = components(finalplot)
    cdn_js=CDN.js_files[0]
    #cdn_css=CDN.css_files[0]
    return render_template("plot.html",
    script1=script1,
    div1=div1,
    #cdn_css=cdn_css,
    cdn_js=cdn_js )



@app.route('/')
def home():
    return render_template("home.html")

@app.route('/about/')
def about():
    return render_template("about.html")

if _name=="main_":
    from werkzeug.serving import run_simple
    #app.run(debug=True,port=)
    run_simple('localhost',9000,app)

Error which i am getting while running is below:-

I am getting error 
  File "/home/XXXX/anaconda3/envs/plot2/lib/python3.7/site-packages/bokeh/embed/standalone.py", line 190, in components
    models = _check_models_or_docs(models)
  File "/home/XXXX/anaconda3/envs/plot2/lib/python3.7/site-packages/bokeh/embed/standalone.py", line 398, in _check_models_or_docs
    'Input must be a Model, a Document, a Sequence of Models and Document, or a dictionary from string to Model and Document'
ValueError: Input must be a Model, a Document, a Sequence of Models and Document, or a dictionary from string to Model and Document
127.0.0.1 - - [23/May/2020 17:38:05] "GET /plot/ HTTP/1.1" 500 -

sorry for font size , by mistake it became bigger in font size.

Kindly let me know to solve this .
Thank you.

Marc Skov Madsen

@MarcSkovMadsen

@maximlt . I believe a talk python to me podcast on holoviz and panel Will be producer in June.

Maxime Liquet

@maximlt

Wow if that's really happening it's great news! For sure expect more people using panel and the other tools after that.

sameerCoder

@sameerCoder

https://stackoverflow.com/questions/61981320/embedding-bokeh-in-flask-valueerror

Marc Skov Madsen

@MarcSkovMadsen

At lot has happened at awesome-panel.org. New template based on Material, Inclusion of PerspectiveViewer, Inclusion of ECharts and more. See https://discourse.holoviz.org/t/awesome-panel-org-change-log/66/21?u=marc

Let me know if you have questions, comments, ideas for improvements or want to try out some of the functionality but just cannot figure out how. Thanks.

@maximlt . Regarding Podcast effect. See this increase in requests/ day to awesome-panel.org after being mentioned on the podcast.

Maxime Liquet

@maximlt

Wow! It also seems that it has a longer effect.

sameerCoder

@sameerCoder

Hi,
can anyone tell me
how to embedded bokeh <class 'panel.layout.Column'> plot into flask app .
I am trying to embed then i am getting ValueError

  File "/home/XXXX/anaconda3/envs/plot2/lib/python3.7/site-packages/bokeh/embed/standalone.py", line 190, in components
    models = _check_models_or_docs(models)
  File "/home/XXXX/anaconda3/envs/plot2/lib/python3.7/site-packages/bokeh/embed/standalone.py", line 398, in _check_models_or_docs
    'Input must be a Model, a Document, a Sequence of Models and Document, or a dictionary from string to Model and Document'
ValueError: Input must be a Model, a Document, a Sequence of Models and Document, or a dictionary from string to Model and Document
127.0.0.1 - - [23/May/2020 17:38:05] "GET /plot/ HTTP/1.1" 500 -

Brian Pollack

@pollackscience

Hi all, is there a way to use panel to change one part of clim without using a RangeSlider? for instance, this works:

img = np.random.normal(size=(100,100))
hv_img = hv.Image(img)
slider = pn.widgets.RangeSlider(start=-5, end=5, value=(-1, 1), name='contrast')
hv_img = hv_img.apply.opts(clim=slider.param.value)
pn.Row(slider, hv_img)

but I can't get something like this to work:

img = np.random.normal(size=(100,100))
hv_img = hv.Image(img)
slider = pn.widgets.FloatSlider(start=0, end=5, value=1, name='contrast')
hv_img = hv_img.apply.opts(clim=(-1, slider.param.value))
pn.Row(slider, hv_img)

I get an error: ValueError: clim: tuple element is not numeric: <param.Number object at 0x7f425a624bb0>.

Philipp Rudiger

@philippjfr

This should work, but questions like are definitely better for Discourse so the answer doesn't disappear.

@pn.depends(slider)
def  clim(value):
    return (-1, value)
hv_img.apply.opts(clim=clim)

Brian Pollack

@pollackscience

whoops, didn't see the discourse link, thanks @philippjfr !

sameerCoder

@sameerCoder

Hi All,
I will very thankful to you and appreciate your help.
script1, div1 = components(finalplot.get_root())
Here get_root() is use to get the parent document but do i need to use curdoc() to get the current plot in flask as my plot is dynamic with dropdown option .

# not working 
script1,div1=components(finalplot.curdoc())

which function i shoud call to get current document , so that when i change bokeh lot in embedded flask app then it should reflect in webpage also.

sameerCoder

@sameerCoder

how to use

on_change(*callbacks)

so that i can get current document on changing my plot dynamically in embedded flask app

Philipp Rudiger

@philippjfr

from bokeh.io import curdoc
doc = curdoc()
script1,div1=components(finalplot.get_root(doc))

sameerCoder

@sameerCoder

Thanks for quick reply @philippjfr
but its not working ,
can i do curdoc() by making standalone HTML files

from bokeh.io import curdoc
 doc=curdoc()
 # finalplot=finalplot.get_root(doc)
 #
 return Markup(file_html(finalplot.get_root(doc),CDN,"myplot"))
if __name__=='__main__':
 app.run(debug=True)

it giving static plot , no zoom function , nothing.

sameerCoder

@sameerCoder

2- by using component method no error is coming same time no plot is showing in webpage ,
i am using
from bokeh.resources import CDN
so there is no mismatch of bokeh cdn version but still no plot showing.

from bokeh.io import curdoc
doc = curdoc()
script, div = components(finalplot.get_root(doc))
cdn_js = CDN.js_files[1]
cdn_css=CDN.css_files
return render_template("plot.html",
 script=script,
 div=div,
 cdn_css=cdn_css,
 cdn_js=cdn_js)
#

plot.html

{%extends "layout.html"%}
{%block content%}
<link rel="stylesheet" href={{cdn_css | safe}} type="text/css" />
<script type="text/javascript" src={{cdn_js | safe}}></script>

<div class="about">
 <h1>My about page</h1>
 <p>This is a test website again</p>
</div>
{{script1 | safe}}
{{div1 | safe}}
{%endblock%}

My about page is showing , no error while plotting but plot is not showing in web page :(
sorry for lengthy .
I will really grateful if u guide me on this .
Thank you.

Philipp Rudiger

@philippjfr

@sameerCoder Please post to the Discourse, this channel is not a support forum.

sameerCoder

@sameerCoder

sorry @philippjfr

Philipp Rudiger

@philippjfr

No problem at all. It's just that questions asked here are bound to come up again and it's not scalable for me to answer them over and over again.

Michael Aye

@michaelaye

there seems to be a dead image link in https://holoviews.org/user_guide/Gridded_Datasets.html

for the grid types

Michael Aye

@michaelaye

reason is something with https vs https in the URL

sameerCoder

@sameerCoder

@philippjfr
As suggested i had posted the question in Discourse ,
if u have time please look after it .
Thank you.
https://discourse.bokeh.org/t/bokeh-embedded-plot-not-showing-with-no-error/5591/13
when bokeh is embedded in flask it act as static :(

Michael Aye

@michaelaye

interesting side note: adding the pyviz labextension to a running server makes panel display show, but dynamic update doesn't work until restart and reset of lab server.

Marc Skov Madsen

@MarcSkovMadsen

I'm to give a course using the HoloViz tutorial tomorrow Tuesday and the 05_Composing_Plots.ipynb is raising a ValueError: Index is not contained within new index. I've reported the issue here holoviz/holoviz#256. If some of you know a fix or workaround so that my course can get past this example it would be much appreciated. Thanks.

Marc Skov Madsen

@MarcSkovMadsen

After some experimentation i discovered that I could change 1M to 1W.

Andrew

@IAteAnDrew1_twitter

maybe 1MS works

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Error which i am getting while running is below:-