Develop Reference

Why does my app designed with kivy doesn't have access to the internet?

Recently I created an application with python by using the kivy module. It is a YouTube to mp3 converter/downloader app. It works absolutely fine and as expected when I run the code on VS. However, once I convert the file from .py to .apk, there is a bug... The issue on the app is that when you paste the link in the input bar and click on the 'submit' button to convert, it doesn't download the video.
I've added some try/except clauses in order to spot the line which is causing an issue to download a vid. I found it on line 70 : it turns out my app cannot browse the streams available for a video. After experimenting with the code on VS, I discovered that an error is happening due to line 70 when my laptop is disconnected from the internet too. That's why I think that the issue is that my app can't access the internet. I uncommented the line granting the internet permission to the app on the buildozer.spec file but it doesn't work anyways and showed the same line was causing a problem.
A snippet from the .py file including the line 70 is below:
try: # browse and select the stream
vid = yt.streams.filter(only_audio=True).first() # this is causing the problem
try:# download the vid
output_file = vid.download(r'''Internal storage/Download''')
try: # change the exctension
base,ext=os.path.splitext(output_file)
new_file = base+'.mp3'
os.rename(output_file, new_file)
self.verification.text=f'download successful new file created at: {new_file}'
except:
self.verification.text="download unsuccesful; problem with os module"
except:
self.verification.text="download unsuccesful; can't download vid"
except:
self.verification.text="download unsuccesful, can't select stream"

Error trying to connect a Python client to AWS IoT becuase of the certificates

Hi I am pretty new in this AWS world, what I am trying to do is connect a python client to the AWS IoT service and publish a message, I am using the SDK python and its example, but I have problems whit the certification process, I already have created the thing, the policies and the certification and I downloaded the files, but in the python program I have no idea if I am writing the path to this files in a correct way,
First I tried writing the whole path of each file and nothing then I tried just putting "certificados\thefile" and nothing .
The error that pops up says the error is the path which precesily I do not how to write it.
Thanks for taking the time and sotty if this question is too basic I am just jumping into this.
# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: MIT-0
import time as t
import json
import AWSIoTPythonSDK.MQTTLib as AWSIoTPyMQTT
# Define ENDPOINT, CLIENT_ID, PATH_TO_CERT, PATH_TO_KEY, PATH_TO_ROOT, MESSAGE, TOPIC, and RANGE
ENDPOINT = "MYENDPOINT"
CLIENT_ID = "testDevice"
PATH_TO_CERT = "certificados/5a7e19a0269abe740ac8b38a1bfdab115d14074eb212167a3ba359c0d237a8c3-certificate.pem.crt"
PATH_TO_KEY = "certificados/5a7e19a0269abe740ac8b38a1bfdab115d14074eb212167a3ba359c0d237a8c3-private.pem.key"
PATH_TO_ROOT = "certificados/AmazonRootCA1.pem"
MESSAGE = "Hello World"
TOPIC = "Prueba/A"
RANGE = 20
myAWSIoTMQTTClient = AWSIoTPyMQTT.AWSIoTMQTTClient(CLIENT_ID)
myAWSIoTMQTTClient.configureEndpoint(ENDPOINT, 8883)
myAWSIoTMQTTClient.configureCredentials(PATH_TO_ROOT, PATH_TO_KEY, PATH_TO_CERT)
myAWSIoTMQTTClient.connect()
print('Begin Publish')
for i in range (RANGE):
data = "{} [{}]".format(MESSAGE, i+1)
message = {"message" : data}
myAWSIoTMQTTClient.publish(TOPIC, json.dumps(message), 1)
print("Published: '" + json.dumps(message) + "' to the topic: " + "'test/testing'")
t.sleep(0.1)
print('Publish End')
myAWSIoTMQTTClient.disconnect()
I have created a directory on my deskopt to store this files, its name is "certificados" and from there I am taking the path but it doesn't work.
OSError: certificados/AmazonRootCA1.pem: No such file or directory
Also I am using VS code to run this application.

The error is pretty clear, it can't find the CA cert file at the path you've given it. The path you've given will be interpreted relative to where the files are executed, which is most likely going to be relative to the python file it's self. If that's not the Desktop then you need to provide the fully qualified path:
So assuming Linux, change the paths to:
PATH_TO_CERT = "/home/user/Desktop/certificados/5a7e19a0269abe740ac8b38a1bfdab115d14074eb212167a3ba359c0d237a8c3-certificate.pem.crt"
PATH_TO_KEY = "/home/user/Desktop/certificados/5a7e19a0269abe740ac8b38a1bfdab115d14074eb212167a3ba359c0d237a8c3-private.pem.key"
PATH_TO_ROOT = "/home/user/Desktop/certificados/AmazonRootCA1.pem"

Python calling q# file on IONQ QPU results in error about a System.Text.Json, Version=5.0.0.0 file not being found

Attempting to learn how to call q# from Python code and have it run for real on the IONQ QPU as it does (or appears to do) using VS and >dotnet run of the raw q# code. I followed the guides and workshop.
Python code:
import qsharp
import qsharp.azure
qsharp.projects.add("****path to *******/TestIONQ.csproj")
from TestIONQ import GetRandomResult
print(f"Simulated Result: {GetRandomResult.simulate()}")
print("------------------------------------------------")
qsharp.azure.connect(
subscription = "****************************",
resourceGroup = "**************",
workspace = "************",
location = "******* US")
qsharp.azure.target("ionq.qpu")
result = qsharp.azure.execute(GetRandomResult, jobName="Generate random bit")
print(f" Final result from IONQ - QPU: {result}")
q# code:
namespace TestIONQ {
open Microsoft.Quantum.Canon;
open Microsoft.Quantum.Intrinsic;
//#EntryPoint()
operation GetRandomResult() : Result {
use q = Qubit();
H(q);
return M(q);
}
}
and the .csproj file:
<Project Sdk="Microsoft.Quantum.Sdk/0.16.2104138035">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp3.1</TargetFramework>
<ExecutionTarget>ionq.qpu</ExecutionTarget>
<IQSharpLoadAutomatically>true</IQSharpLoadAutomatically>
</PropertyGroup>
</Project>
The results of running the above Python code in Anaconda qsharp-env environment (Python 3.7.10) are as follows:
Simulated Result: 0
------------------------------------------------
Connected to Azure Quantum workspace ####### in location #####us.
Loading package Microsoft.Quantum.Providers.IonQ and dependencies...
Active target is now ionq.qpu
Submitting TestIONQ.GetRandomResult to target ionq.qpu...
Failed to submit Q# operation TestIONQ.GetRandomResult for execution.
Could not load file or assembly 'System.Text.Json, Version=5.0.0.0, Culture=neutral, PublicKeyToken=####token#####'. The system cannot find the file specified.
Obviously, no problem connecting to Azure and the Workspace. In fact I can run the container-ship optimization example no problem from Python. This also works fine for the first half of the Python code when .simulate() is invoked.
Next, when I try to bypass the IONQ QPU and use its own simulator by changing this one line:
qsharp.azure.target("ionq.simulator")
The resulting error is the same and the results are as follows:
Simulated Result: 1
------------------------------------------------
Connected to Azure Quantum workspace ######## in location #######.
Loading package Microsoft.Quantum.Providers.IonQ and dependencies...
Active target is now ionq.simulator
Submitting TestIONQ.GetRandomResult to target ionq.simulator...
Failed to submit Q# operation TestIONQ.GetRandomResult for execution.
Could not load file or assembly 'System.Text.Json, Version=5.0.0.0, Culture=neutral, PublicKeyToken='....token......'. The system cannot find the file specified.
Traceback (most recent call last):
File "ionq_sim_remote.py", line 18, in <module>
result = qsharp.azure.execute(GetRandomResult, jobName="Generate random bit")
File "F:\Python38\miniconda\envs\qsharp-env\lib\site-packages\qsharp\azure.py", line 137, in execute
if "error_code" in result: raise AzureError(result)
qsharp.azure.AzureError: {'error_code': 1010, 'error_name': 'JobSubmissionFailed', 'error_description': 'Failed to submit the job to the Azure Quantum workspace.'}
This runs very easily on Azure using the q# code snippet within Visual Studio at the command line using a variant of what was shown during the workshop
az quantum execute --target-id ionq.qpu --job-name IONQ_test --resource-group ***rg name*** --workspace-name ***ws name*** --location **** -o table
and indeed this appears to have run on the actual QPU hardware as compared to the simulator (which gives the exact 0.5/0.5 result).
Result Frequency
-------- ----------
0 0.49800000
1 0.50200000
But then calling that same q# code from Python - including the same .csproj file seems to throw this JSON file error - even with the qsharp-env loaded into Anaconda. I apologize if it is something silly that I have done- trying to learn here.
By the way, this works great as a way around the problem with no Anaconda environment required or anything special:
Python:
import os
os.system(f'powershell.exe az quantum execute --target-id ionq.qpu --job-name Pytest --resource-group **** --workspace-name **** --location **** -o table ')
And the result was definitely run on the actual hardware (took a good while):
Result Frequency
-------- ----------- -------------------------
0 0.53200000 ▐███████████ |
1 0.46800000 ▐█████████ |

#Joab.Ai, thank you for posting this issue! We've identified this to be specific to the latest version of qsharp (0.16.2104.138035).
While we are looking into a fix, a workaround will be to downgrade your qsharp package version:
Edit: we have fixed this issue in our latest release! Update to the latest version with this command:
conda install -c quantum-engineering qsharp=0.16.2105.140472
or simply run:
conda update -c quantum-engineering qsharp

How to fix ALDialog Python Script NAOqi Error

I am trying to use ALDialog module to have a virtual conversation with the Choregraphe simulated NAO6 robot. I have the below script:
import qi
import argparse
import sys
def main(session):
"""
This example uses ALDialog methods.
It's a short dialog session with two topics.
"""
# Getting the service ALDialog
ALDialog = session.service("ALDialog")
ALDialog.setLanguage("English")
# writing topics' qichat code as text strings (end-of-line characters are important!)
topic_content_1 = ('topic: ~example_topic_content()\n'
'language: enu\n'
'concept:(food) [fruits chicken beef eggs]\n'
'u: (I [want "would like"] {some} _~food) Sure! You must really like $1 .\n'
'u: (how are you today) Hello human, I am fine thank you and you?\n'
'u: (Good morning Nao did you sleep well) No damn! You forgot to switch me off!\n'
'u: ([e:FrontTactilTouched e:MiddleTactilTouched e:RearTactilTouched]) You touched my head!\n')
topic_content_2 = ('topic: ~dummy_topic()\n'
'language: enu\n'
'u:(test) [a b "c d" "e f g"]\n')
# Loading the topics directly as text strings
topic_name_1 = ALDialog.loadTopicContent(topic_content_1)
topic_name_2 = ALDialog.loadTopicContent(topic_content_2)
# Activating the loaded topics
ALDialog.activateTopic(topic_name_1)
ALDialog.activateTopic(topic_name_2)
# Starting the dialog engine - we need to type an arbitrary string as the identifier
# We subscribe only ONCE, regardless of the number of topics we have activated
ALDialog.subscribe('my_dialog_example')
try:
raw_input("\nSpeak to the robot using rules from both the activated topics. Press Enter when finished:")
finally:
# stopping the dialog engine
ALDialog.unsubscribe('my_dialog_example')
# Deactivating all topics
ALDialog.deactivateTopic(topic_name_1)
ALDialog.deactivateTopic(topic_name_2)
# now that the dialog engine is stopped and there are no more activated topics,
# we can unload all topics and free the associated memory
ALDialog.unloadTopic(topic_name_1)
ALDialog.unloadTopic(topic_name_2)
if __name__ == "__main__":
session = qi.Session()
try:
session.connect("tcp://desktop-6d4cqe5.local:9559")
except RuntimeError:
print ("\nCan't connect to Naoqi at IP desktop-6d4cqe5.local(port 9559).\nPlease check your script's arguments."
" Run with -h option for help.\n")
sys.exit(1)
main(session, "desktop-6d4cqe5.local")
My simulated robot has desktop-6d4cqe5.local as IP address and its NAOqi port is running on 63361. I want to run the dialogs outside of the Choregraphe in a python script and only be able to use the dialog box within the Choregraphe to test it. When I ran the above python file I got:
Traceback (most recent call last):
File "C:\Users\...\Documents\...\choregraphe_codes\Welcome\speak.py", line 6, in <module>
import qi
File "C:\Python27\Lib\site-packages\pynaoqi\lib\qi\__init__.py", line 93
async, PeriodicTask)
^
SyntaxError: invalid syntax
I couldn't figure out the problem as there was not much resources online and the robot's documentations are a bit hard to understand.
Please help, thank you.

You are running the script using a Python version greater than 3.5, that sees async as a keyword, now.
NAOqi only supports Python 2.
Try running your script with python2 explicitly.

pyinstaller Error starting service: The service did not respond to the start or control request in a timely fashion

I have been searching since a couple of days for a solution without success.
We have a windows service build to copy some files from one location to another one.
So I build the code shown below with Python 3.7.
The full coding can be found on Github.
When I run the service using python all is working fine, I can install the service and also start the service.
This using commands:
Install the service:
python jis53_backup.py install
Run the service:
python jis53_backup.py start
When I now compile this code using pyinstaller with command:
pyinstaller -F --hidden-import=win32timezone jis53_backup.py
After the exe is created, I can install the service but when trying to start the service I get the error:
Error starting service: The service did not respond to the start or
control request in a timely fashion
I have gone through multiple posts on Stackoverflow and on Google related to this error however, without success. I don't have the option to install the python 3.7 programs on the PC's that would need to run this service. That's why we are trying to get a .exe build.
I have made sure to have the path updated according to the information that I found in the different questions.
Image of path definitions:
I also copied the pywintypes37.dll file.
From -> Python37\Lib\site-packages\pywin32_system32
To -> Python37\Lib\site-packages\win32
Does anyone have any other suggestions on how to get this working?
'''
Windows service to copy a file from one location to another
at a certain interval.
'''
import sys
import time
from distutils.dir_util import copy_tree
import servicemanager
import win32serviceutil
import win32service
from HelperModules.CheckFileExistance import check_folder_exists, create_folder
from HelperModules.ReadConfig import (check_config_file_exists,
create_config_file, read_config_file)
from ServiceBaseClass.SMWinService import SMWinservice
sys.path += ['filecopy_service/ServiceBaseClass',
'filecopy_service/HelperModules']
class Jis53Backup(SMWinservice):
_svc_name_ = "Jis53Backup"
_svc_display_name_ = "JIS53 backup copy"
_svc_description_ = "Service to copy files from server to local drive"
def start(self):
self.conf = read_config_file()
if not check_folder_exists(self.conf['dest']):
create_folder(self.conf['dest'])
self.isrunning = True
def stop(self):
self.isrunning = False
def main(self):
self.ReportServiceStatus(win32service.SERVICE_RUNNING)
while self.isrunning:
# Copy the files from the server to a local folder
# TODO: build function to trigger only when a file is changed.
copy_tree(self.conf['origin'], self.conf['dest'], update=1)
time.sleep(30)
if __name__ == '__main__':
if sys.argv[1] == 'install':
if not check_config_file_exists():
create_config_file()
if len(sys.argv) == 1:
servicemanager.Initialize()
servicemanager.PrepareToHostSingle(Jis53Backup)
servicemanager.StartServiceCtrlDispatcher()
else:
win32serviceutil.HandleCommandLine(Jis53Backup)

I was also facing this issue after compiling using pyinstaller. For me, the issue was that I was using the paths to configs and logs file in dynamic way, for ex:
curr_path = os.path.dirname(os.path.abspath(__file__))
configs_path = os.path.join(curr_path, 'configs', 'app_config.json')
opc_configs_path = os.path.join(curr_path, 'configs', 'opc.json')
log_file_path = os.path.join(curr_path, 'logs', 'application.log')
This was working fine when I was starting the service using python service.py install/start. But after compiling it using pyinstaller, it always gave me error of not starting in timely fashion.
To resolve this, I made all the dynamic paths to static, for ex:
configs_path = 'C:\\Program Files (x86)\\ScantechOPC\\configs\\app_config.json'
opc_configs_path = 'C:\\Program Files (x86)\\ScantechOPC\\configs\\opc.json'
debug_file = 'C:\\Program Files (x86)\\ScantechOPC\\logs\\application.log'
After compiling via pyinstaller, it is now working fine without any error. Looks like when we do dynamic path, it doesn't get the actual path to files and thus it gives error.
Hope this solves your problem too. Thanks