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Webots Attribute Error while getting the robot references

I would like to reproduce the following tutorial, but when I tried to get the robot references theres always this Error:
"AttributeError: 'CartpoleRobot' object has no attribute 'getSelf'"
I rebuild this Tutorial: https://github.com/aidudezzz/deepbots-tutorials/blob/master/robotSupervisorSchemeTutorial/README.md
In other controllers I get similar error messages when I try to get the robot references. I think the error is in the communication between the robot simulation and the controller.
I have tried importing the supervisor and getting the functions via supervisor.get. But here comes another error: "Only one instance of the Robot class should be created"
However, I am new to webots and robotics/informatics in general. Any help would be greatly appreciated!
The whole Error with Traceback:
INFO: robotSupervisorController: Starting controller: python.exe -u robotSupervisorController.py
Traceback (most recent call last):
File "D:\Webots Projekte\controllers\robotSupervisorController\robotSupervisorController.py", line 88, in <module>
env = CartpoleRobot()
File "D:\Webots Projekte\controllers\robotSupervisorController\robotSupervisorController.py", line 16, in __init__
self.robot = self.getSelf() # Grab the robot reference from the supervisor to access various robot methods
AttributeError: 'CartpoleRobot' object has no attribute 'getSelf'
WARNING: 'robotSupervisorController' Controller beendet mit Status: 1
The Code is the same than shown in the Tutorial.
The short section that generates the error:
self.robot = self.getSelf() # Grab the robot reference from the supervisor to access various robot methods
self.positionSensor = self.getDevice("polePosSensor")
self.positionSensor.enable(self.timestep)
If I comment out the first one, the next line returns a similar error
Every answer is highly appreciated! Thanks!

I had the same issue. I use the deepbots-0.1.2 and webotsR2021a.
Try to uninstall the deepbots and then install them using the:
pip install -i https://test.pypi.org/simple/ deepbots

Multiprocessing array .get_lock works on one computer but not another

I am working a somewhat extensive python program that uses multiprocessing. Because I wanted the user to see some progress on the console when running the program, I read about using a shared counter on stackoverflow and after a while of playing around with my code, I got it to work. As I said it's too much code to post here, but the gist is that I instantiate a multiprocessing array after the name==main line,
if __name__ == "__main__":
total_progress_counter = Array('i',[0,0])
and then during the main portion of code I pass this array to a function in other module:
some_name.plot(<other variables>,
total_progress_counter=total_progress_counter)
Then within that other function, I used the .get_lock method that I found described here on stackoverflow:
with total_progress_counter.get_lock():
total_progress_counter[0] += self.total_panels_to_plot
I also update the other component, total_progress_counter[1], in the same function. This works fine for me on my work machine, where I wrote the code, and that machine has a Centos operating system.
But, when I run it on my personal MacBook it gives the following traceback:
Traceback (most recent call last):
File "./program.py", line 775, in <module>
program.run()
File "./program.py", line 177, in run
cases_plotted = pool.map(self.__plot__, all_cases)
File "/opt/anaconda3/lib/python3.8/multiprocessing/pool.py", line 364, in map
return self._map_async(func, iterable, mapstar, chunksize).get()
File "/opt/anaconda3/lib/python3.8/multiprocessing/pool.py", line 771, in get
raise self._value
AttributeError: 'list' object has no attribute 'get_lock'
I have python3 version 3.8.3 on my personal machine and python3 version 3.7.4 on my work machine. Can anyone help me understand why I'm getting different behavior on these two environments? I'd be grateful, as this is meant to be software others might use on different machines.

Pylint AttributeError: 'module' object has no attribute 'append'

I was configuring my new laptop (macbook pro) and everything was fine until I wanted to try my pylint command.
Traceback (most recent call last):
File "/usr/local/bin/pylint", line 11, in <module>
load_entry_point('pylint==1.6.4', 'console_scripts', 'pylint')()
File "/usr/local/lib/python2.7/site-packages/pylint-1.6.4-py2.7.egg/pylint/__init__.py", line 13, in run_pylint
Run(sys.argv[1:])
File "/usr/local/lib/python2.7/site-packages/pylint-1.6.4-py2.7.egg/pylint/lint.py", line 1270, in __init__
'init-hook')))
File "/usr/local/lib/python2.7/site-packages/pylint-1.6.4-py2.7.egg/pylint/lint.py", line 1371, in cb_init_hook
exec(value) # pylint: disable=exec-used
File "<string>", line 1, in <module>
AttributeError: 'module' object has no attribute 'append'
From that I don't understand what's wrong with my pylint .... I tried a lot of things but as I'm not quite sure of what I've done at the end, I prefer to not list things.
Is there someone who already got it ? Someone who have an idea how to solve it?
Thanks for your help

Hi, can you show the value of init-hook from the configuration file you are using? What happen is that you have configured, somehow, init-hook with some invalid code. You can see this in your traceback through the last exec call, which happens only when init-hook is provided. Seeing its value could lead to solving this problem. My intuition is that you probably have something as in ``init-hook="import sys; sys.append(some_path)"
Thanks to PCManticore, that was that, I had a .pylintrc in my home folder that had something weard for the init-hook value. I changed that and everything is working well now.

EasyGui fileopenbox() Error. Has TKinter Changed? [Python]

Keeping it relatively simple. I'm trying to open a fileopenbox to select a file using easygui.
easygui.fileopenbox()
And easyGUI throws this error
'module' object has no attribute 'askopenfilename'
The Stack Trace
Traceback (most recent call last):
File "C:\Users\Administrator\Desktop\test.py", line 377, in <module>
easygui.fileopenbox()
File "C:\Python27\lib\site-packages\easygui\boxes\fileopen_box.py", line 103, in fileopenbox
func = ut.tk_FileDialog.askopenfilenames if multiple else ut.tk_FileDialog.askopenfilename
AttributeError: 'module' object has no attribute 'askopenfilename'
Whats going on here?
Nothings changed on my system at all, but it almost looks like for some reason python cant find this tkInter function.
Has anyone come across this?
Thanks!
Edit: An additional screenshot showing that the method is not found
https://gyazo.com/8b9ba0f6c23561d13babe7ce4c8b67a1

Try uninstalling your Easygui and install latest one.
Also try update Python version.

Can't install trigger network automation tools

I read in the howto documentation to install Trigger, but when I test in python environment, I get the error below:
>>> from trigger.netdevices import NetDevices
>>> nd = NetDevices()
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/dist-packages/trigger/netdevices/__init__.py", line 913, in __init__
with_acls=with_acls)
File "/usr/local/lib/python2.7/dist-packages/trigger/netdevices/__init__.py", line 767, in __init__
production_only=production_only, with_acls=with_acls)
File "/usr/local/lib/python2.7/dist-packages/trigger/netdevices/__init__.py", line 83, in _populate
# device_data = _munge_source_data(data_source=data_source)
File "/usr/local/lib/python2.7/dist-packages/trigger/netdevices/__init__.py", line 73, in _munge_source_data
# return loader.load_metadata(path, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/trigger/netdevices/loader.py", line 163, in load_metadata
raise RuntimeError('No data loaders succeeded. Tried: %r' % tried)
RuntimeError: No data loaders succeeded. Tried: [<trigger.netdevices.loaders.filesystem.XMLLoader object at 0x7f550a1ed350>, <trigger.netdevices.loaders.filesystem.JSONLoader object at 0x7f550a1ed210>, <trigger.netdevices.loaders.filesystem.SQLiteLoader object at 0x7f550a1ed250>, <trigger.netdevices.loaders.filesystem.CSVLoader object at 0x7f550a1ed290>, <trigger.netdevices.loaders.filesystem.RancidLoader object at 0x7f550a1ed550>]
Does anyone have some idea how to fix it?

The NetDevices constructor is apparently trying to find a "metadata source" that isn't there.
Firstly, you need to define the metadata. Second, your code should handle the exception where none is found.

I'm the lead developer of Trigger. Check out the the doc Working with NetDevices. It is probably what you were missing. We've done some work recently to improve the quality of the setup/install docs, and I hope that this is more clear now!
If you want to get started super quickly, you can feed Trigger a CSV-formatted NetDevices file, like so:
test1-abc.net.example.com,juniper
test2-abc.net.example.com,cisco
Just put that in a file, e.g. /tmp/netdevices.csv and then set the NETDEVICES_SOURCE environment variable:
export NETDEVICES_SOURCE=/tmp/netdevices.csv
And then fire up python and continue on with your examples and you should be good to go!

I found that the default of /etc/trigger/netdevices.xml wasn't listed in the setup instructions. It did indicate to copy from the trigger source folder:
cp conf/netdevices.json /etc/trigger/netdevices.json
But, I didn't see how to specify this instead of the default NETDEVICES_SOURCE on the installation page. But, as soon as I had a file that NETDEVICES_SOURCE pointed to in my /etc/trigger folder, it worked.
I recommend this to get the verifying functionality examples to work right away with minimal fuss:
cp conf/netdevices.xml /etc/trigger/netdevices.xml
Using Ubuntu 14.04 with Python 2.7.3