I am trying to find a way to successfully pass a function to a Worker class in Python using PyQT5. Instead of using the pre-defined run function (or Long-running task) in the sample Worker class code, I would like to be able to pass a custom function to the worker class. Below I’ve pasted the sample cod…
Tag: multithreading
How do you differentiate between the process and thread in python?
From what I understand, thread and process differs in that thread shares resources. I am not sure if this differs from one language to another, but how do you differentiate between thread and process in general or in Python? Are every independent functions different process? Would a class methods be threads a…
Is it the right way to run 2 infiniteloop in python?
i wrote a code in python with 2 infinite loop like this: If i don’t join any thread it’s not working, but when i join 1 thread, another thread is work too but i don’t know why? Can anyone explain for me? Answer Join is used to block the calling method until the thread finishes, throws an exc…
pass function from class without starting it python
I need to run two functions with the threading module you’re able to do this Thread(target=my_func) but i want the function from a class (imported class) so i tried Thread(target=a_class.my_func) but it didn’t worked, then i tried Thread(target=a_class.my_func()) but this one starts to run the fun…
One Queue for each Consumer – Python
I’m in a single-producer/multiple-consumers scenario. Consider that each job is independent and the consumers do not communicate among them. Could it be a good idea to create a different queue for each consumer? In that way, the producer adds jobs in each queue in a round-robin fashion and there are no …
How to encapsulate an imported module into a method for multithreading in python?
I’m new in python and I have a concurrent problem when using internal functions of importing libraries. The problem is that my code calculates different kinds of variables and in the last process they are saved into different files. But I have the same problem when reading and writing. This is an exampl…
PyQt5: Python crashes with SIGSEGV *sometimes* when sending pixmap via a signal from another thread
Background and Issue I am trying to process streaming data from a camera. Python keeps crashing with this message though: The crash happens sometimes while emitting the signal containing an image. My code, shown below, follows this process: A QObject named CameraThread is instantiated within the GUI and is ru…
Python thread.join(timeout) not timing out
I am using threading python module. I want to execute a function which runs an expression entered by a user. I want to wait for it to finish execution or until a timeout period is reached. The following code should timeout after 5 second, but it never times out. Why is this and how can I fix this behaviour? S…
python service inside thread inside singleton
I have a singleton in which I want to receive data from a service. Since I’m new to python the only way I could figure this out was that a service sends the data up to the singleton via a method pointer. I use the thread to hinder the service to lock the singleton with its infinite loop. The actual
Running functions siultaneoulsy in python
I am making a small program in which I need a few functions to check for something in the background. I used module threading and all those functions indeed run simultaneously and everything works perfectly until I start adding more functions. As the threading module makes new threads, they all stay within th…