Error '/usr/bin/orca' does not seem to be a valid plotly orca executable

New to plotly, I tried the code below and got the following error:

import plotly.io as pio
from plotly.offline import iplot, init_notebook_mode
import numpy as np
import plotly.graph_objs as go
init_notebook_mode(connected=True)


N = 100
x = np.random.rand(N)
y = np.random.rand(N)
colors = np.random.rand(N)
sz = np.random.rand(N)*30

fig = go.Figure()
fig.add_scatter(x=x,
                y=y,
                mode='markers',
                marker={'size': sz,
                        'color': colors,
                        'opacity': 0.6,
                        'colorscale': 'Viridis'})
iplot(fig)

pio.write_image(fig, 'plot.png')

I got this error

ValueError                                Traceback (most recent call last)
<ipython-input-2-f198cc1664f7> in <module>
     22 iplot(fig)
     23 
---> 24 pio.write_image(fig, 'plot.png')

~/.local/lib/python3.5/site-packages/plotly/io/_orca.py in write_image(fig, file, format, scale, width, height, validate)
   1510                         width=width,
   1511                         height=height,
-> 1512                         validate=validate)
   1513 
   1514     # Open file

~/.local/lib/python3.5/site-packages/plotly/io/_orca.py in to_image(fig, format, width, height, scale, validate)
   1292     # Make sure orca sever is running
   1293     # -------------------------------
-> 1294     ensure_server()
   1295 
   1296     # Handle defaults

~/.local/lib/python3.5/site-packages/plotly/io/_orca.py in ensure_server()
   1161     # Validate orca executable
   1162     if status.state == 'unvalidated':
-> 1163         validate_executable()
   1164 
   1165     # Acquire lock to make sure that we keep the properties of orca_state

~/.local/lib/python3.5/site-packages/plotly/io/_orca.py in validate_executable()
   1007 
   1008 {help_result}
-> 1009 """.format(executable=executable, help_result=help_result))
   1010 
   1011     # Get orca version

** I read previous issues on orca so I checked <$which orca> and <$ orca --help > and got the ff responses:** </usr/bin/orca>

/usr/lib/python3/dist-packages/pyatspi/__init__.py:17: PyGIWarning: Atspi was imported without specifying a version first. Use gi.require_version('Atspi', '2.0') before import to ensure that the right version gets loaded.
  from gi.repository import Atspi
Usage: orca [-h] [-v] [-r] [-s] [-t] [-l] [-e OPTION] [-d OPTION] [-p NAME]
            [-u DIR] [--debug-file FILE] [--debug]

Optional arguments:
  -h, --help                   Show this help message and exit
  -v, --version                3.18.2
  -r, --replace                Replace a currently running instance of this
                               screen reader
  -s, --setup                  Set up user preferences (GUI version)
  -t, --text-setup             Set up user preferences (text version)
  -l, --list-apps              Print the known running applications
  -e OPTION, --enable OPTION   Force use of option
  -d OPTION, --disable OPTION  Prevent use of option
  -p NAME, --profile NAME      Load profile
  -u DIR, --user-prefs DIR     Use alternate directory for user preferences
  --debug-file FILE            Send debug output to the specified file
  --debug                      Send debug output to debug-YYYY-MM-DD-
                               HH:MM:SS.out

Report bugs to [e-mail].

What should I do? I want to save my plotly file without doing it manually in the browser. Thanks.

[paulmenzel]

Cf. issue https://github.com/plotly/orca/issues/350.

[janxkoci]

Report bugs to [e-mail].

Last time, it was 3.18.2

This is because your orca was not from plotly, but a GNOME screen reader Orca. Pretty funky name collision (and quite avoidable by plotly, as Orca has been around for a long time).