Gym: when call render() function, it say:XlibException: Could not create UTF8 text property

[flutist]

Hello, i want to ask a question, not matter what env i initial, when i call render() function, it say:

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/gym/core.py", line 150, in render
return self._render(mode=mode, close=close)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/gym/core.py", line 286, in _render
return self.env.render(mode, close)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/gym/core.py", line 150, in render
return self._render(mode=mode, close=close)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/gym/envs/classic_control/cartpole.py", line 115, in _render
from gym.envs.classic_control import rendering

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/gym/envs/classic_control/rendering.py", line 23, in
from pyglet.gl import *

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/gl/__init__.py", line 236, in
import pyglet.window

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/window/__init__.py", line 1816, in
gl._create_shadow_window()

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/gl/__init__.py", line 205, in _create_shadow_window
_shadow_window = Window(width=1, height=1, visible=False)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/window/xlib/__init__.py", line 163, in __init__
super(XlibWindow, self).__init__(args, *kwargs)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/window/__init__.py", line 558, in __init__
self._create()

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/window/xlib/__init__.py", line 353, in _create
self.set_caption(self._caption)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/window/xlib/__init__.py", line 513, in set_caption
self._set_text_property('_NET_WM_NAME', caption)

File "/home/hit/anaconda2/envs/py3k/lib/python3.6/site-packages/pyglet/window/xlib/__init__.py", line 783, in _set_text_property
raise XlibException('Could not create UTF8 text property')

XlibException: Could not create UTF8 text property

can you help me, thanks

[dukelec]

I got the same problem.

[zeus7777777]

Same issue

[dukelec]

Python2.7 has no such issue.

[Guiadan]

same problem
anybody fixed this somehow?

[kanakkabara]

Any fixes?

[MobiusZ]

same problem for python 3.5

[20chase]

pygame environment also has this problem for python 3.5

[SunnerLi]

import pyglet
window = pyglet.window.Window()

Even though the developer claim that it's the problem of locale.
However, the program can run normally in python 2.7, while failing in python 3.5.
Thus I think it's the problem of pyglet.
I try for the above code,
and the error will occur.

Traceback (most recent call last):
  File "/usr/local/lib/python3.5/dist-packages/pyglet/__init__.py", line 378, in __getattr__
    return getattr(self._module, name)
AttributeError: 'NoneType' object has no attribute 'Window'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.5/dist-packages/pyglet/__init__.py", line 384, in __getattr__
    __import__(import_name)
  File "/usr/local/lib/python3.5/dist-packages/pyglet/window/__init__.py", line 1884, in <module>
    gl._create_shadow_window()
  File "/usr/local/lib/python3.5/dist-packages/pyglet/gl/__init__.py", line 208, in _create_shadow_window
    _shadow_window = Window(width=1, height=1, visible=False)
  File "/usr/local/lib/python3.5/dist-packages/pyglet/window/xlib/__init__.py", line 166, in __init__
    super(XlibWindow, self).__init__(*args, **kwargs)
  File "/usr/local/lib/python3.5/dist-packages/pyglet/window/__init__.py", line 571, in __init__
    self._create()
  File "/usr/local/lib/python3.5/dist-packages/pyglet/window/xlib/__init__.py", line 356, in _create
    self.set_caption(self._caption)
  File "/usr/local/lib/python3.5/dist-packages/pyglet/window/xlib/__init__.py", line 522, in set_caption
    self._set_text_property('_NET_WM_NAME', caption)
  File "/usr/local/lib/python3.5/dist-packages/pyglet/window/xlib/__init__.py", line 806, in _set_text_property
    raise XlibException('Could not create UTF8 text property')
pyglet.window.xlib.XlibException: Could not create UTF8 text property

I refer to others opinion.
Maybe try to revise the locale setting can solve the problem.
However, I try for the following commands,
I don't know how to revise en_US.utf8 into en_US.utf-8.

$ sudo cat /etc/default/locale 
#  File generated by update-locale
LANG=en_US.UTF-8
LC_NUMERIC="lzh_TW"
LC_TIME="lzh_TW"
LC_MONETARY="lzh_TW"
LC_PAPER="lzh_TW"
LC_NAME="lzh_TW"
LC_ADDRESS="lzh_TW"
LC_TELEPHONE="lzh_TW"
LC_MEASUREMENT="lzh_TW"
LC_IDENTIFICATION="lzh_TW"

$ sudo locale -a
C
C.UTF-8
en_AG
en_AG.utf8
en_AU.utf8
en_BW.utf8
en_CA.utf8
en_DK.utf8
en_GB.utf8
en_HK.utf8
en_IE.utf8
en_IN
en_IN.utf8
en_NG
en_NG.utf8
en_NZ.utf8
en_PH.utf8
en_SG.utf8
en_US.utf8
en_ZA.utf8
en_ZM
en_ZM.utf8
en_ZW.utf8
lzh_TW
lzh_TW.utf8
POSIX

The only possible way is just using python 2.7 to run.
Does anyone have other idea?

[SunnerLi]

I found an awkward solution:

1. edit your /etc/default/locale, and try to feed all locale critiria as the same:

#  File generated by update-locale
LANG=en_US.UTF-8
LC_NUMERIC=en_US.UTF-8
LC_TIME=en_US.UTF-8
LC_MONETARY=en_US.UTF-8
LC_PAPER=en_US.UTF-8
LC_NAME=en_US.UTF-8
LC_ADDRESS=en_US.UTF-8
LC_TELEPHONE=en_US.UTF-8
LC_MEASUREMENT=en_US.UTF-8
LC_IDENTIFICATION=en_US.UTF-8
LC_ALL=en_US.UTF-8

1. Use sudo dpkg-reconfigure locales to set your own language. Make sure to mark en_US.UTF-8 selection.

2. sudo locale-gen en_US en_US.UTF-8

3. Reboot

[adamzhang129]

@SunnerLi bravo! It works for me. Thank you

[tengerye]

Alternative solution on Ubuntu 16.04:

1. Create the file /etc/locale.conf if not exists and insert the line LANG=en_US.UTF-8;
2. Edit the file /etc/default/locale and let the first line be LANG=en_US.UTF-8;
3. Run locale-gen;
4. Reboot.

[alonrs]

Simpler solution:

In your terminal window:

1. Write LANG=en_US
2. Run your python code
   It worked for me. You will need to do this every time you open a new terminal.

Another option:
Add the following to your python code (before everything):

import os
os.environ['LANG']='en_US'

[christopherhesse]

Thanks for answering this @SunnerLi and @tengerye. Some applications seem to require running locale-gen en_US.UTF-8 or one of these other solutions.