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Problems with let otree devserver run

I have a Python Code to conduct an experiment. To ensure that the Code is working smoothly I wanted to run a trial round via 'otree devserver', but I always get an AttributeError message and I am stuck here. Can anyone help me out?
I have downloaded the Code from GitHub and downloaded all required packages. I am using macOS, otree-5.10.2 and django-4.1.7. Here is my full traceback / error message:
Traceback (most recent call last): File
"/Users/.otreevenv/bin/otree", line 8, in
sys.exit(execute_from_command_line()) File "/Users/.otreevenv/lib/python3.10/site-packages/otree/main.py", line
108, in execute_from_command_line
setup() File "/Users/.otreevenv/lib/python3.10/site-packages/otree/main.py", line
132, in setup
from otree import settings File "/Users/.otreevenv/lib/python3.10/site-packages/otree/settings.py",
line 50, in
OTREE_APPS = get_OTREE_APPS(settings.SESSION_CONFIGS) File "/Users/.otreevenv/lib/python3.10/site-packages/django/conf/__init__.py",
line 94, in __getattr__
val = getattr(_wrapped, name) File "/Users/.otreevenv/lib/python3.10/site-packages/django/conf/__init__.py",
line 270, in __getattr__
return getattr(self.default_settings, name) AttributeError: module 'django.conf.global_settings' has no attribute 'SESSION_CONFIGS'. Did
you mean: 'SESSION_ENGINE'?

Getting "TypeError: 'NoneType' object is not iterable" while doing parallel ssh

I am trying to do parallel ssh on servers. While doing this, i am getting "TypeError: 'NoneType' object is not iterable" this error. Kindly help.
My script is below
from pssh import ParallelSSHClient
from pssh.exceptions import AuthenticationException, UnknownHostException, ConnectionErrorException
def parallelsshjob():
client = ParallelSSHClient(['10.84.226.72','10.84.226.74'], user = 'root', password = 'XXX')
try:
output = client.run_command('racadm getsvctag', sudo=True)
print output
except (AuthenticationException, UnknownHostException, ConnectionErrorException):
pass
#print output
if __name__ == '__main__':
parallelsshjob()
And the Traceback is below
Traceback (most recent call last):
File "parallelssh.py", line 17, in <module>
parallelsshjob()
File "parallelssh.py", line 10, in parallelsshjob
output = client.run_command('racadm getsvctag', sudo=True)
File "/Library/Python/2.7/site-packages/pssh/pssh_client.py", line 520, in run_command
raise ex
TypeError: 'NoneType' object is not iterable
Help me with the solution and also suggest me to use ssh-agent in this same script. Thanks in advance.

From reading the code and debugging a bit on my laptop, I believe the issue is that you don't have a file called ~/.ssh/config. It seems that parallel-ssh has a dependency on OpenSSH configuration, and this is the error you get when that file is missing.
read_openssh_config returns None here: https://github.com/pkittenis/parallel-ssh/blob/master/pssh/utils.py#L79
In turn, SSHClient.__init__ blows up when trying to unpack the values it expects to receive: https://github.com/pkittenis/parallel-ssh/blob/master/pssh/ssh_client.py#L97.
The fix is presumably to get some sort of OpenSSH config file in place, but I'm sorry to say I know nothing about that.
EDIT
After cleaning up some of parallel-ssh's exception handling, here's a better stack trace for the error:
Traceback (most recent call last):
File "test.py", line 11, in <module>
parallelsshjob()
File "test.py", line 7, in parallelsshjob
output = client.run_command('racadm getsvctag', sudo=True)
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/pssh/pssh_client.py", line 517, in run_command
self.get_output(cmd, output)
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/pssh/pssh_client.py", line 601, in get_output
(channel, host, stdout, stderr, stdin) = cmd.get()
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/gevent/greenlet.py", line 480, in get
self._raise_exception()
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/gevent/greenlet.py", line 171, in _raise_exception
reraise(*self.exc_info)
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/gevent/greenlet.py", line 534, in run
result = self._run(*self.args, **self.kwargs)
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/pssh/pssh_client.py", line 559, in _exec_command
channel_timeout=self.channel_timeout)
File "/Users/smarx/test/pssh/venv/lib/python2.7/site-packages/pssh/ssh_client.py", line 98, in __init__
host, config_file=_openssh_config_file)
TypeError: 'NoneType' object is not iterable

This was seemingly a regression in the 0.92.0 version of the library which is now resolved in 0.92.1. Previous versions also work. OpenSSH config should not be a dependency.
To answer your SSH agent question, if there is one running and enabled in the user session it gets used automatically. If you would prefer to provide a private key programmatically can do the following
from pssh import ParallelSSHClient
from pssh.utils import load_private_key
pkey = load_private_key('my_private_key')
client = ParallelSSHClient(hosts, pkey=pkey)
Can also provide an agent with multiple keys programmatically, per below
from pssh import ParallelSSHClient
from pssh.utils import load_private_key
from pssh.agent import SSHAgent
pkey = load_private_key('my_private_key')
agent = SSHAgent()
agent.add_key(pkey)
client = ParallelSSHClient(hosts, agent=agent)
See documentation for more examples.

python and elastic search update errors

today I'm updated the elastic search from 1.6 to 2.1, because 1.6 is vulnerable version, after this update my website not working, give this error :
Traceback (most recent call last):
File "manage.py", line 8, in <module>
from app import app, db
File "/opt/project/app/__init__.py", line 30, in <module>
es.create_index(app.config['ELASTICSEARCH_INDEX'])
File "/usr/local/lib/python2.7/dist-packages/pyelasticsearch/client.py", line 93, in decorate
return func(*args, query_params=query_params, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/pyelasticsearch/client.py", line 1033, in create_index
query_params=query_params)
File "/usr/local/lib/python2.7/dist-packages/pyelasticsearch/client.py", line 285, in send_request
self._raise_exception(status, error_message)
File "/usr/local/lib/python2.7/dist-packages/pyelasticsearch/client.py", line 299, in _raise_exception
raise error_class(status, error_message)
pyelasticsearch.exceptions.ElasticHttpError: (400, u'index_already_exists_exception')
make: *** [run] Error 1
the code is this :
redis = Redis()
es = ElasticSearch(app.config['ELASTICSEARCH_URI'])
try:
es.create_index(app.config['ELASTICSEARCH_INDEX'])
except IndexAlreadyExistsError, e:
pass
where is wrong ? what is new on this new version ?

You're getting the following error: index_already_exists_exception
This means that you're trying to create an index that already exists. The second time you run your program you either need to delete your index first or create it only if it doesn't exist.

You have handled the exception using IndexAlreadyExistsError. Try using TransportError to handle the exception.
And you can also add a check like :
exist = es.indices.exists(index_name)
if not exist:
es.create_index(app.config['ELASTICSEARCH_INDEX'])

Creating a track object with track_from_file method in pyechonest

I am new to python. I am trying to use track_from_file method in pyechonest to create a track object. This is the code I wrote:
from pyechonest import config
from pyechonest.track import track_from_file
config.ECHO_NEST_API_KEY = "KRZG4XOVUQRKI45DP"
f = open("ShayneWard-NoPromises.mp3")
t = track_from_file(f, 'mp3')
But this is not working. I got an EchoNestIOError. This is the full error Traceback that i got.
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "build/bdist.linux-x86_64/egg/pyechonest/track.py", line 243, in track_from_file
File "build/bdist.linux-x86_64/egg/pyechonest/track.py", line 331, in track_from_md5
File "build/bdist.linux-x86_64/egg/pyechonest/track.py", line 209, in _profile
File "build/bdist.linux-x86_64/egg/pyechonest/util.py", line 257, in callm pyechonest.util.
EchoNestIOError: Echo Nest Unknown Error
Can anyone tell me what have I done wrong?

I finally figured it out. It seems that the upload does not take place through the proxy server of my university network which uses NAT.

Strange exception with python's cgitb and inspect.py

I have a function that decodes an exception and pushes the info to a file. Following is what I do basically:
exc_info = sys.exc_info
txt = cgitb.text(exc_info)
Using this, I got the following exception trace:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "C:\Python27\lib\site-packages\job_queue\utils\start_workers.py", line 40, in start_worker
worker_loop(r_jq, worktype, worker_id)
File "C:\Python27\lib\site-packages\job_queue\server\jq_worker.py", line 55, in worker_loop
_job_machine(*job)
File "C:\Python27\lib\site-packages\job_queue\server\jq_worker.py", line 34, in _job_machine
do_verbose_exception()
File "C:\Python27\lib\site-packages\job_queue\server\errors.py", line 23, in do_verbose_exception
txt = cgitb.text(exc_info)
File "C:\Python27\lib\cgitb.py", line 214, in text
formatvalue=lambda value: '=' + pydoc.text.repr(value))
File "C:\Python27\lib\inspect.py", line 885, in formatargvalues
specs.append(strseq(args[i], convert, join))
File "C:\Python27\lib\inspect.py", line 840, in strseq
return convert(object)
File "C:\Python27\lib\inspect.py", line 882, in convert
return formatarg(name) + formatvalue(locals[name])
KeyError: 'connection'
I ran the code multiple times after this exception, but couldn't reproduce it. However, I didn't find any reference in files cgitb.py or inspect.py to a dict with 'connection' key either.
Will anybody know if this is an issue with python's cgitb or inspect files? Any helpful inputs?

You passed a wrong type to text function
below is the correct way.
cgitb.text((sys.last_type, sys.last_value, sys.last_traceback))

Im not sure specifically why this exception is happening, but have you read the docs for cgitb module? It seems that since python 2.2 it has supported writing exceptions to a file:
http://docs.python.org/library/cgitb.html
Probably something like:
cgitb.enable(0, "/my/log/directory") # or 1 if you want to see it in browser
As far as your actual traceback, are you sure 'connection' isnt a name you are using in your own code? 'inspect' module is most likely trying to examine your own code to build the cgi traceback info and getting a bad key somewhere?