python-3.4 – Page 4 – Tarik Billa

How could I use requests in asyncio?

October 20, 2022 by Tarik

To use requests (or any other blocking libraries) with asyncio, you can use BaseEventLoop.run_in_executor to run a function in another thread and yield from it to get the result. For example: import asyncio import requests @asyncio.coroutine def main(): loop = asyncio.get_event_loop() future1 = loop.run_in_executor(None, requests.get, ‘http://www.google.com’) future2 = loop.run_in_executor(None, requests.get, ‘http://www.google.co.uk’) response1 = yield from … Read more

Getting value of enum on string conversion

October 12, 2022 by Tarik

You are printing the enum object. Use the .value attribute if you wanted just to print that: print(D.x.value) See the Programmatic access to enumeration members and their attributes section: If you have an enum member and need its name or value: >>> >>> member = Color.red >>> member.name ‘red’ >>> member.value 1 You could add … Read more

Python3: ImportError: No module named ‘_ctypes’ when using Value from module multiprocessing

October 5, 2022 by Tarik

Installing libffi-dev and re-installing python3.7 fixed the problem for me. to cleanly build py 3.7 libffi-dev is required or else later stuff will fail If using RHEL/Fedora: yum install libffi-devel or sudo dnf install libffi-devel If using Debian/Ubuntu: sudo apt-get install libffi-dev

Python3 project remove pycache folders and .pyc files

October 5, 2022 by Tarik

You can do it manually with the next command: find . | grep -E “(/__pycache__$|\.pyc$|\.pyo$)” | xargs rm -rf This will remove all .pyc and .pyo files as well as __pycache__ directories recursively starting from the current directory.

Python type hinting without cyclic imports

October 4, 2022 by Tarik

There isn’t a hugely elegant way to handle import cycles in general, I’m afraid. Your choices are to either redesign your code to remove the cyclic dependency, or if it isn’t feasible, do something like this: # some_file.py from typing import TYPE_CHECKING if TYPE_CHECKING: from main import Main class MyObject(object): def func2(self, some_param: ‘Main’): … … Read more