Develop Reference

OpenCV & Streamlit: "error: Unknown C++ exception from OpenCV code"

I get the below error on several different lines when making commands from script through Streamlit app. The process is a function call to opencv script is called via "process_file" function. This is what generates the below error.
What I've tried:
I've tested script seperatly and it processes video fine
I've tried using python-headless and uninstalling regular opencv
processed_file = process_file(uploaded_file)
ERROR:
app/venv/lib/python3.9/site-packages/streamlit/runtime/scriptrunner/script_runner.py", line 562, in _run_script
exec(code, module.__dict__)
File "app/app.py", line 116, in <module>
run_app()
File "/app.py", line 81, in run_app
processed_file = process_file(uploaded_file)
File "/app.py", line 70, in process_file
return inference.main(file)
File "app/inference.py", line 66, in main
cv.namedWindow(winName, cv.WINDOW_NORMAL)

How to parse Java code in Python using ANTLRv4

I'm trying to parse some Java code in Python using ANTLRv4. I've tried to follow this post, but I get the following error:
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/antlr/proto_antlr.py", line 14, in <module>
main()
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/antlr/proto_antlr.py", line 9, in main
tree = parser.compilationUnit()
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/antlr/Java8Parser.py", line 4182, in compilationUnit
self.enterRule(localctx, 62, self.RULE_compilationUnit)
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/Parser.py", line 374, in enterRule
self._ctx.start = self._input.LT(1)
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/CommonTokenStream.py", line 62, in LT
self.lazyInit()
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 187, in lazyInit
self.setup()
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 190, in setup
self.sync(0)
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 112, in sync
fetched = self.fetch(n)
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/BufferedTokenStream.py", line 124, in fetch
t = self.tokenSource.nextToken()
File "/home/xxxxxxx/xxxxxxx/xxxxxxx/lib/python3.8/site-packages/antlr4/Lexer.py", line 130, in nextToken
self._tokenStartLine = self._interp.line_number
AttributeError: 'LexerATNSimulator' object has no attribute 'line_number'
I can't figure out what I'm doing wrong. The file I'm trying to parse is proper Java, it's extracted from the docker-maven-plugin package. I've tried with other files, but I get the same error.
Any idea ?

Actually it was just a problem of violent refactorization... I've changed line to line_number in my code, and it actually changed it in librairies too. Changing it back to line cleared the problem.
Thanks to #Thomas Kläger for making me realize it.

tensorflow.python.framework.errors_impl.NotFoundError: data/kitti_label_map.pbtxt; No such file or directory

I'm trying to convert the kitti dataset into the tensorflow .record. After I typed the command:
python object_detection/dataset_tools/create_kitti_tf_record.py
--lable_map_path=object_detection/data/kitti_label_map.pbtxt --data_dir=/Users/zhenglyu/Graduate/research/DataSet/kitti/data_object_image_2/testing/image_2
--output_path=/Users/zhenglyu/Graduate/research/DataSet/kitti2tf/train.record
validation_set_size=1000
I got this error:
Traceback (most recent call last): File
"object_detection/dataset_tools/create_kitti_tf_record.py", line 310,
in
tf.app.run() File "/Users/zhenglyu/tensorflow/lib/python3.6/site-packages/tensorflow/python/platform/app.py",
line 126, in run
_sys.exit(main(argv)) File "object_detection/dataset_tools/create_kitti_tf_record.py", line 307,
in main
validation_set_size=FLAGS.validation_set_size) File "object_detection/dataset_tools/create_kitti_tf_record.py", line 94,
in convert_kitti_to_tfrecords
label_map_dict = label_map_util.get_label_map_dict(label_map_path) File
"/Users/zhenglyu/Graduate/research/TensorFlow/model/research/object_detection/utils/label_map_util.py",
line 152, in get_label_map_dict
label_map = load_labelmap(label_map_path) File "/Users/zhenglyu/Graduate/research/TensorFlow/model/research/object_detection/utils/label_map_util.py",
line 132, in load_labelmap
label_map_string = fid.read() File "/Users/zhenglyu/tensorflow/lib/python3.6/site-packages/tensorflow/python/lib/io/file_io.py",
line 120, in read
self._preread_check() File "/Users/zhenglyu/tensorflow/lib/python3.6/site-packages/tensorflow/python/lib/io/file_io.py",
line 80, in _preread_check
compat.as_bytes(self.name), 1024 * 512, status) File "/Users/zhenglyu/tensorflow/lib/python3.6/site-packages/tensorflow/python/framework/errors_impl.py",
line 519, in __exit
c_api.TF_GetCode(self.status.status)) tensorflow.python.framework.errors_impl.NotFoundError:
data/kitti_label_map.pbtxt; No such file or directory
The file exists for sure. And I don't know why as I set the label_map_path to another one (object_detection/data/kitti_label_map.pbtxt), the path still remains the default setting (data/kitti_label_map.pbtxt).
I know there's a lot of related problem but none of the solutions that I found works for me. I used Virtualenv to install the tensorflow and using python 3.6. Could these be the problem? Thanks!

I don't have a definitive solution to this but here is what resolved it.
First, I copied the kitti_label_map.pbtxt into the data_dir. Then I also copied create_kitti_tf_record.py into the data_dir. And now I copied(this is what made it run in the end) the name and absolute path of the kitti_label_map.pbtxt and pasted it as label_map_path
I have no idea why but it worked.

Python code runs in interactive prompt but not as script

I am trying to interface with an Ocean optics spectrometer using seabreeze (seabreeze) and pyseabreeze (pyseabreeze).
If I enter python from the command prompt (cmd) in windows and enter the following code line by line, it works. However, if I put it in a script (spec_test.py) and try running it from cmd.exe by using 'python spec_test.py', it will not work.
I have searched around a lot for similar problems but none seem to cover the issue I'm having. I am running Windows 7 64 bit, python 3.5.2 installed using anaconda. I also had to install pyusb and libusb to use pyseabreeze.
The code:
import seabreeze
seabreeze.use('pyseabreeze')
import seabreeze.spectrometers as sb
devs = sb.list_devices()
print(devs)
spec = sb.Spectrometer(devs[0])
print(spec.model)
and the error message I get:
[<SeaBreezeDevice USB2000PLUS:FLMS02379>]
Traceback (most recent call last):
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\pyseabreeze\interfaces\common.py", line 14, in decorated_func
return func(*args, **kwargs)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\pyseabreeze\interfaces\spectrometer.py", line 46, in open
self.open_device(device.handle)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\pyseabreeze\interfaces\communication.py", line 37, in open_device
device.set_configuration()
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\usb\core.py", line 869, in set_configuration
self._ctx.managed_set_configuration(self, configuration)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\usb\core.py", line 102, in wrapper
return f(self, *args, **kwargs)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\usb\core.py", line 148, in managed_set_configuration
self.backend.set_configuration(self.handle, cfg.bConfigurationValue)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\usb\backend\libusb0.py", line 493, in set_configuration
_check(_lib.usb_set_configuration(dev_handle, config_value))
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\usb\backend\libusb0.py", line 431, in _check
raise USBError(errmsg, ret)
usb.core.USBError: [Errno None] b'libusb0-dll:err [set_configuration] could not set config 1: win error: The parameter is incorrect.\r\n'
Traceback (most recent call last):
File "<ipython-input-9-ead886eb3666>", line 1, in <module>
runfile('C:/Users/Raman Lab/Python code/Spectrometers/spec_testing.py', wdir='C:/Users/Raman Lab/Python code/Spectrometers')
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 866, in runfile
execfile(filename, namespace)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\spyder\utils\site\sitecustomize.py", line 102, in execfile
exec(compile(f.read(), filename, 'exec'), namespace)
File "C:/Users/Raman Lab/Python code/Spectrometers/spec_testing.py", line 7, in <module>
spec = sb.Spectrometer(devs[0])
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\spectrometers.py", line 62, in __init__
self._open_device(device)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\spectrometers.py", line 90, in _open_device
lib.device_open(self._dev)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\pyseabreeze\wrapper.py", line 81, in device_open
return device.interface.open(device)
File "C:\Users\Raman Lab\AppData\Local\Continuum\Anaconda3\lib\site-packages\seabreeze\pyseabreeze\interfaces\common.py", line 23, in decorated_func
raise SeaBreezeError(msg)
SeaBreezeError: An error occured during opening.
Thanks for any help!
Edit:
For some reason I figured this out, thought it might help describe the issue. If I enter interactive python from cmd.exe and paste the code instead of typing it in manually, I get the same error. This makes me think (most likely I'm wrong) that it is somehow tied up with speed of imports. I tried adding a sleep for a few seconds in between lines 3 and 5, to simulate what happens when I am typing in the prompt, but that didn't help. I hope this was descriptive enough.

Your initial guess was not far off. I had exactly the same problem, however, on Windows 7 32bit with Python 2.7. The example code gchaks linked to was running fine.
When I tried executing the script several times in quick succession, the error message changed and pointed at a empty devices list. I added a delay of 2 seconds after
devs = sb.list_devices()
and that solved the problem. Your code was running just fine on a Linux machine btw.
Another hint: If your code should run once, but then you run into another error message, make sure you close the device connection or dis- and reconnect the spectrometer.

Cannot open my client

I am trying to open my tryton client but it is not working
the snapshot of my problem :
the text of the problem is:
File "./tryton", line 66, in <module>
tryton.client.TrytonClient().run()
File "/home/ghassen/work/tryton/tryton/client.py", line 101, in run
main.sig_login()
File "/home/ghassen/work/tryton/tryton/gui/main.py", line 910, in sig_login
res = DBLogin().run()
File "/home/ghassen/work/tryton/tryton/gui/window/dblogin.py", line 579, in run
if (self.profiles.get(profile_name, sectionname)
File "/usr/lib/python2.7/ConfigParser.py", line 618, in get
raise NoOptionError(option, section)

Tryton has a profile file where it saves the know connections, and from the error it seems that file is corrupted. You can find this file under ~/.config/tryton/x.y/profiles.cfg where x.y corresponds to you version number.
If you don't have any saved profile, you can remove this file and the client will recreate them when started another time.