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Python tftp handling error: "No options found in OACK"

I am using python 3's module tftpy to attempt to handle tftp style downloading of a file. However, when I run the application I get the following error:
\Python38\site-packages\tftpy\TftpStates.py", line 53, in handleOACK
raise TftpException("No options found in OACK")
tftpy.TftpShared.TftpException: No options found in OACK
How do I get my python project to ignore OACK/ send a new request packet that doesn't include an OACK?
Disclaimer: This is my first time attempting to work with TFTP packets so I am fairly new. If the question I posed isn't the appropriate way to handle it, what should I be doing?
MORE DATA ON THE PROBLEM:
I am using an external chip that is programmed to ignore OACK packet options.
When I used C# and the TFTP.Net package the transfer worked, so I don't believe it is an issue with my TFTP server. However, as our main application is based in python I want to be able to handle this communication via python 3.
I am running python 3.8.5
On my server side it is saying it receives a packet with error code 8.
python Script:
import tftpy
client = tftpy.TftpClient('192.168.0.42', 69)
client.download('triplog.txt', 'faultlog.txt', packethook=None, timeout=5)
full traceback:
Failed to negotiate options: No options found in OACK
Traceback (most recent call last):
File "C:\Users\selena\Documents\PythonScripts\TFTP\TFTPTestScript.py", line 23, in <module>
client.download('triplog.txt', 'faultlog.txt', packethook=None, timeout=5)
File "C:\Users\selena\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\tftpy\TftpClient.py", line 58, in download
self.context.start()
File "C:\Users\selena\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\tftpy\TftpContexts.py", line 402, in start
self.cycle()
File "C:\Users\selena\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\tftpy\TftpContexts.py", line 202, in cycle
self.state = self.state.handle(recvpkt, raddress, rport)
File "C:\Users\selena\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\tftpy\TftpStates.py", line 566, in handle
self.handleOACK(pkt)
File "C:\Users\selena\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\tftpy\TftpStates.py", line 53, in handleOACK
raise TftpException("No options found in OACK")
tftpy.TftpShared.TftpException: No options found in OACK
[Finished in 0.7s with exit code 1]

Credit #ewong for this workaround solution
The code worked after adding in options when initializing the client even though I didn't need them. I'll be filing an issue #https://github.com/msoulier/tftpy to see if this is a bug that needs to be addressed or a deliberate choice.
Solution code:
import tftpy
client = tftpy.TftpClient('192.168.0.42', 69, options={'blksize': 8})
client.download('triplog.txt', 'faultlog.txt', packethook=None, timeout=5)

Perforce (P4) Python API complains about too many locks

I wrote an application that opens several subprocesses, which initiate connections individually to a Perforce server. After a while I get this error message in almost all of these child-processes:
Traceback (most recent call last):
File "/Users/peter/Desktop/test_app/main.py", line 76, in p4_execute
p4.run_login()
File "/usr/local/lib/python3.7/site-packages/P4.py", line 665, in run_login
return self.run("login", *args, **kargs)
File "/usr/local/lib/python3.7/site-packages/P4.py", line 611, in run
raise e
File "/usr/local/lib/python3.7/site-packages/P4.py", line 605, in run
result = P4API.P4Adapter.run(self, *flatArgs)
P4.P4Exception: [P4#run] Errors during command execution( "p4 login" )
[Error]: "Fatal client error; disconnecting!
Operation 'client-SetPassword' failed.
Too many trys to get lock /Users/peter/.p4tickets.lck."
Does anyone have any idea what could cause this? I open my connections properly and all double checked on all source locations that I disconnect from the server properly via disconnect.
Only deleting the .p4tickets.lck manually works until the error comes back after a few seconds

The relevant code is here:
https://swarm.workshop.perforce.com/projects/perforce_software-p4/files/2018-1/support/ticket.cc#200
https://swarm.workshop.perforce.com/projects/perforce_software-p4/files/2018-1/sys/filetmp.cc#147
I can't see that there's any code path where the ticket.lck file would fail to get cleaned up without throwing some other error.
Is there anything unusual about the home directory where the tickets file lives? Like, say, it's on a network filer with some latency and some kind of backup process? Or maybe one that doesn't properly enforce file locks between all these subprocesses you're spawning?
How often are your scripts running "p4 login" to refresh and re-write the ticket? Many times a second? If you change them to not do that (e.g. only login if there's not already a ticket) does the problem persist?

Error using Google Assistant Library with Raspberry Pi 3 and Python (Credentials not accepted)

I successfully managed to get Google's Assistant working on my Raspberry Pi 3. It works by using
google-assistant-demo --d device_id1234
Now I want to get access with python to turn on/off an LED when a certain command is recognized. Unfortunately the page I followed isn't free, so I can't provide a link. The problematic part of my code is the following:
def main():
parser = argparse.ArgumentParser(
formatter_class=argparse.RawTextHelpFormatter)
parser.add_argument('--credentials', type=existing_file,
metavar='OAUTH2_CREDENTIALS_FILE',
default=os.path.join(
os.path.expanduser('~/.config'),
'google-oauthlib-tool',
'credentials.json'
),
help='Path to store and read OAuth2 credentials')
args = parser.parse_args()
with open(args.credentials, 'r') as f:
credentials = google.oauth2.credentials.Credentials(token=None,
**json.load(f))
with Assistant(credentials) as assistant:
print("Warte auf Hotword")
for event in assistant.start():
process_event(event, assistant)
and when I run the script by
python assistant.py --credentials client_secret_blabla.json
it throws the error
Traceback (most recent call last):
File "assistant.py", line 137, in <module>
main()
File "assistant.py", line 128, in main
**json.load(f)
TypeError: __init__() got an unexpected keyword argument 'installed'
I tried to reinstall everything and also redownloaded the json file. Obviously the json doesn't get recognized properly, but I don't have any clue what to do. My JSON looks like this:
{"installed":{"client_id":"XXX.apps.googleusercontent.com","project_id":"dotted-nature-182957","auth_uri":"https://accounts.google.com/o/oauth2/auth","token_uri":"https://accounts.google.com/o/oauth2/token","auth_provider_x509_cert_url":"https://www.googleapis.com/oauth2/v1/certs","client_secret":"XXX","redirect_uris":["urn:ietf:wg:oauth:2.0:oob","http://localhost"]}}
here is what the Credentials class is expecting:
http://google-auth.readthedocs.io/en/latest/reference/google.oauth2.credentials.html
I hope you guys can help me with this. Thanks a lot in advance!

I just figured it out. The problem was that I was using the wrong json file. I find the documentation kind of unclear concerning that. The JSON file you have to hand over to the python script is the one which is downloaded when executing
google-oauthlib-tool --client-secrets /home/pi/PREVIOUSLYDOWNLOADEDJSON.json --scope https://www.googleapis.com/auth/assistant-sdk-prototype --save --headless
which is located at /home/pi/.config/google-oauthlib-tool/ in default.

How could I close Excel file using pywinauto

I'm having a problem that I can't excel file.
I was using swapy+pywinauto.
program export excel file with different name (ex. time..)
I used swapy to close the export excel.
from pywinauto.application import Application
app = Application().Start(cmd_line=u'"C:\\Program Files\\Microsoft Office\\Office14\\EXCEL.EXE" \\dde')
xlmain = app.XLMAIN
xlmain.Wait('ready')
xlmain.Close()
app.Kill_()
but got error below.
Traceback (most recent call last):
File "D:/23007.py", line 54, in <module>
xlmain.Wait('ready')
WaitUntil(timeout, retry_interval, lambda: self.__check_all_conditions(check_method_names))
File "C:\Python35\lib\site-packages\pywinauto\timings.py", line 308, in WaitUntil
raise err
pywinauto.timings.TimeoutError: timed out
Process finished with exit code 1

Why do you use app.XLMAIN? Is the title of window similar to XLMAIN? Usually the title is <file name> - Excel so that pywinauto can handle it so: xlmain = app["<file name> - Excel"].
Obviously Wait('ready') raised an exception because the window with title "XLMAIN" or similar is not found.
Generally I would recommend using pyWin32 standard module win32com.client to work with Excel (through standard COM interface). See the second answer here for example: Driving Excel from Python in Windows

Dealing with capturing error in python - won't "try" and will crash script

I must be doing something wrong that I can't figure out from other resources on teh web.
At one point in my script I try to run:
username= win32security.LookupAccountSid(None, ace[2])[0]
From which I get and error
Traceback (most recent call last):
File "<pyshell#10>", line 1, in <module>
win32security.LookupAccountSid(None, ace[2])[0]
error: (1332, 'LookupAccountSid', 'No mapping between account names and security IDs was done.')
I figured out this happens when you have a security registry for which there no longer is a user so it shows up on the permissions as S-1-xxx...
In order to get the script to move on I wrote:
try:
username= win32security.LookupAccountSid(None, ace[2])[0]
except:
nouser +=1
This code will still give the error and stop my script. How can I get my script to ignore when this error happens?