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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
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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?
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How do I get the ASCII value of a character as an int in Python?
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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 compatible Therefore, when creating a new venv for a new project, I would like to downgrade Python, say to 3 8, only for this specific venv How can I do that?
- Python: how to determine if an object is iterable?
When you use for item in o for some iterable object o, Python calls iter(o) and expects an iterator object as the return value An iterator is any object which implements a __next__ (or next in Python 2) method and an __iter__ method By convention, the __iter__ method of an iterator should return the object itself (i e return self)
- python - How can I install cv2? - Stack Overflow
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 several receipts I found on the Internet, but nothing worked I tried to install as pre-compiled (sudo apt-get install python-opencv) - No error, but when I try the
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