plotly / plotly/dash

Live-Updates doesn't work on Raspberry Pi 3[BUG]

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#962 2 comments 0 reactions 0 assignees View on GitHub

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bug P3
Dominant language
Python
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Description

  • replace the result of pip list | grep dash below
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7.
dash                               1.3.0      
dash-core-components               1.2.0      
dash-daq                           0.2.1      
dash-html-components               1.0.1      
dash-renderer                      1.1.0      
dash-table                         4.3.0
  • if frontend related, tell us your Browser, Version and OS

Raspbian GNU/Linux 9 using Chromium

Describe the bug

When following the Live-Updates tutorial from https://dash.plot.ly/live-updates, the graphs appear in the web browser, but the graphs are empty. Below are screen shots of what happened vs. what is expected respectively.

Screen Shot 2019-10-08 at 4 45 22 PM Screen Shot 2019-10-08 at 4 46 23 PM

SOLUTION:

The solution was to simply increase the interval to 1 * 10000 ms. Then the live-updates worked as expected. Not entirely sure why, but wanted to bring this issue up. Thanks!

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the Live-Updates tutorial on Raspbian GNU/Linux 9 with Chromium, using the reported package versions and comparing the default interval with 10000 ms. Done means the graphs populate reliably at the documented interval, or the Raspberry Pi-specific cause and required workaround are documented.

Written by the indexing model from the issue text.

Assessment

Tech stack
python, raspberry-pi
Domain
data-visualization, embedded-iot, frontend
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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