#csharp#pdf#pdf_converter#pdf_document_processor#pdf_generation
PDFPatcher is a free and open-source tool that helps you manage PDF files. It allows you to edit PDF metadata, bookmarks, and page layouts. You can also merge, split, and rotate PDF pages. Additionally, it supports converting PDF pages to images and extracting specific pages. The software is free to use and does not have ads or privacy concerns. It encourages users to do a good deed after using it, which is part of its unique "良心授权" (conscience license) agreement. This tool is beneficial for users who need to manipulate PDFs without spending money on expensive software.
https://github.com/wmjordan/PDFPatcher
🌍 Submarine hydrothermal vents on the ocean floor release superheated water and minerals, fueling unique ecosystems powered by chemical energy instead of sunlight. ✨
#processes⚡#ocean⚡#ecosystems⚡#geography⚡#nature⚡#earth
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🌍 Earth's crust is in constant motion due to convection currents—slow, swirling movement of hot rock deep below the surface. This drives plate movement, causing earthquakes and forming new land. ✨
#processes⚡#plate⚡#tectonics⚡#geology⚡#geography⚡#nature⚡#earth
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https://docs.python.org/3/library/subprocess.html
The #subprocess module allows you to spawn new #processes, connect to their input/output/error pipes, and obtain their return codes. This module intends to replace several older #modules and #functions.
#python
https://pymotw.com/3/asyncio/executors.html
Combining Coroutines with Threads and Processes
A lot of existing libraries are not ready to be used with #asyncio natively. They may block, or depend on concurrency features not available through the module. It is still possible to use those libraries in an application based on asyncio by using an #executor from #concurrent.futures to run the code either in a separate thread or a separate process.
#Threads
The #run_in_executor() method of the event loop takes an executor instance, a regular callable to invoke, and any arguments to be passed to the callable. It returns a Future that can be used to wait for the function to finish its work and return something. If no executor is passed in, a #ThreadPoolExecutor is created. This example explicitly creates an executor to limit the number of worker threads it will have available.
#Processes
A ProcessPoolExecutor works in much the same way, creating a set of worker #processes instead of threads. Using separate processes requires more system resources, but for computationally-intensive operations it can make sense to run a separate task on each CPU core.
#learn