Using 'or' in an 'if' statement (Python) [duplicate] Asked 7 years, 10 months ago Modified 2 months ago Viewed 162k times

现在装什么 Python 版本比较合适？ 截止到 2025 年，Python 的官方最新稳定版本是 3.12.x，而 3.13 已经进入稳定发布阶段（部分库的兼容性还在逐渐完善）。

How do I declare custom exception classes in modern Python? My primary goal is to follow whatever standard other exception classes have, so that (for instance) any extra string I include in the exc...

16 Márta 2017 · Why is it 'better' to use my_dict.keys() over iterating directly over the dictionary? Iteration over a dictionary is clearly documented as yielding keys. It appears you had Python 2 in mind …

9 Iúil 2010 · In Python 3, generator is the default behavior Not sure if returning a list is still mandatory (or a generator would do as well), but passing a generator to the list constructor, will create a list out of it …

How can I access environment variables in Python? Asked 14 years, 10 months ago Modified 1 year, 10 months ago Viewed 3.5m times

29 Márta 2023 · Python修复不了也卸载不掉也安装不了怎么办? 什么先卸载再重装、先修复再重装、删掉所有python文件、重启电脑，全试过了。

15 Noll 2011 · Bonjour, je dipose d'une liste contenant des milliers de valeurs, j'aimerai pouvoir déterminer le nombre d'occurences de chacunes des valeurs. Je sais compter combien de fois un …

15 Lún 2018 · I need to install cv2 for a script that has been written for me. I tried pip install cv2 and pip install open_cv and got the same problem - a warning message from dist.py and complains about zlib ...

11 MFómh 2019 · 32 My environment: Ubuntu 18.04 LTS (Bionic Beaver) (also tried on Ubuntu 19.04 (Disco Dingo)) I use/need Python 3 (3.6.8 installed). I need cv2, which is a model of OpenCV. I tried …