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Showing posts with the label Python Multiprocessing

Across Process Boundary In Scoped_session

I'm using SQLAlchemy and multiprocessing. I also use scoped_session sinse it avoids share the s… Read more Across Process Boundary In Scoped_session

Python Multiprocessing: Broken Pipe Exception After Increasing Pool Size

The exception I get. All I did that I increased pool count Code def parse(url): r = request.get(… Read more Python Multiprocessing: Broken Pipe Exception After Increasing Pool Size

Non-blocking Multiprocessing.connection.listener?

I use multiprocessing.connection.Listener for communication between processes, and it works as a ch… Read more Non-blocking Multiprocessing.connection.listener?

Ewma Covariance Matrix In Pandas - Optimization

I would like to calculate the EWMA Covariance Matrix from a DataFrame of stock price returns using … Read more Ewma Covariance Matrix In Pandas - Optimization

Can't Map A Function To Tarfile Members In Parallel

I have a tarfile containing bz2-compressed files. I want to apply the function clean_file to each o… Read more Can't Map A Function To Tarfile Members In Parallel

How To Use Multiprocessing In Python Right?

import time from multiprocessing import Process start = time.perf_counter() def sleep(): prin… Read more How To Use Multiprocessing In Python Right?

How To Speed Up For Loop Execution Using Multiprocessing In Python

I have two lists. List A contains 500 words. List B contains 10000 words. I am trying to find simil… Read more How To Speed Up For Loop Execution Using Multiprocessing In Python

Picklingerror When Using Multiprocessing

I am having trouble when using the Pool.map_async() (and also Pool.map()) in the multiprocessing mo… Read more Picklingerror When Using Multiprocessing

Python Multiprocessing, Can't Pickle Thread.lock (pymongo)

I have a class with the following method: def get_add_new_links(self, max_num_links): self.get_… Read more Python Multiprocessing, Can't Pickle Thread.lock (pymongo)

What Is The Best Way To Load Multiple Files Into Memory In Parallel Using Python 3.6?

I have 6 large files which each of them contains a dictionary object that I saved in a hard disk us… Read more What Is The Best Way To Load Multiple Files Into Memory In Parallel Using Python 3.6?

Multiple Process Is Not Getting Created Python

I am working on task where I am creating multiple process to run code in parallel to speed up proce… Read more Multiple Process Is Not Getting Created Python

Thread Identifier In Multiprocessing Pool Workers

I believed Thread.ident as a unique identifier of threads but now I see different worker processes … Read more Thread Identifier In Multiprocessing Pool Workers

How To Get Python's Multiprocessing Array'pointer And Pass It To Cpp Program?

I now need to request arrays in python, and pass them into a Cpp program, yet python still needs to… Read more How To Get Python's Multiprocessing Array'pointer And Pass It To Cpp Program?

Order Of Subprocesses Execution And It's Impact On Operations Atomicity

I'm learning python multiprocessing module and I've found this example (this is a bit modif… Read more Order Of Subprocesses Execution And It's Impact On Operations Atomicity

Tkinter Application 'freezes' While Continually Polling Pipe For Contents (multiprocessing)

I have two scripts: Processor_child.py: Its purpose is to perform a number of data analysis and cle… Read more Tkinter Application 'freezes' While Continually Polling Pipe For Contents (multiprocessing)

What Am I Missing In Python-multiprocessing/multithreading?

I am creating, multiplying and then summing all elements of two big matrices in numpy. I do this so… Read more What Am I Missing In Python-multiprocessing/multithreading?

How To Resize A Shared Memory In Python

I want to use an array for shared memory. The problem is the program is structured in such a way th… Read more How To Resize A Shared Memory In Python

Multiprocessing Initialising A Function In A Class

I am trying to initialise a function in a class using multiprocessing, by calling it from a functio… Read more Multiprocessing Initialising A Function In A Class

Passing Multiple Arguments To Pool.map Using Class Function

I'm trying to thread as described in this post, and also pass multiple arguments in Python 2.7 … Read more Passing Multiple Arguments To Pool.map Using Class Function

Python Multiprocessing - Overflowerror('cannot Serialize A Bytes Object Larger Than 4gib')

We are running a script using the multiprocessing library (python 3.6), where a big pd.DataFrame is… Read more Python Multiprocessing - Overflowerror('cannot Serialize A Bytes Object Larger Than 4gib')