python - Why do some functions have underscores "__" before and …
May 24, 2024 · In Python, the use of an underscore in a function name indicates that the function is intended for internal use and should not be called directly by users. It is a convention used to …
Using 'or' in an 'if' statement (Python) - Stack Overflow
Using 'or' in an 'if' statement (Python) [duplicate] Asked 7 years, 10 months ago Modified 2 months ago Viewed 162k times
python - `from ... import` vs `import .` - Stack Overflow
Feb 25, 2012 · I'm wondering if there's any difference between the code fragment from urllib import request and the fragment import urllib.request or if they are interchangeable. If they are …
How do I declare custom exceptions in modern Python?
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 …
python - Iterating over a dictionary using a 'for' loop, getting keys ...
Mar 16, 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 …
python - How do I list all files of a directory? - Stack Overflow
Jul 9, 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 …
python - How can I install cv2? - Stack Overflow
Sep 11, 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 …
python - Find the current directory and file's directory - Stack …
How do I determine: the current directory (where I was in the shell when I ran the Python script), and where the Python file I am executing is?
How to list all installed packages and their versions in Python?
Is there a way in Python to list all installed packages and their versions? I know I can go inside python/Lib/site-packages and see what files and directories exist, but I find this very awkward. ...
How to create a venv with a different Python version
Dec 20, 2021 · 100 I have different venvs in my machine in which I have Python 3.10. Now for a specific project, I realised that Python 3.10 is not suitable as some libraries are still not …