- What does colon equal (:=) in Python mean? - Stack Overflow
What does the := operand mean, more specifically for Python? Can someone explain how to read this snippet of code? node := root, cost = 0 frontier := priority queue containing node only explored :=
- How should I use the Optional type hint? - Stack Overflow
Python 3 10 introduces the | union operator into type hinting, see PEP 604 Instead of Union[str, int] you can write str | int In line with other type-hinted languages, the preferred (and more concise) way to denote an optional argument in Python 3 10 and up, is now Type | None, e g str | None or list | None
- 为什么打开python程序总是弹出Modify Setup ? - 知乎
Python是一个命令提示符下运行的程序。当然，前提是你要设置环境变量，要不然命令提示符不知道到哪里找到你安装的Python。（如果你在安装时勾选了就不需要手动设置环境变量） 如果你不确定是否设置了环境变量，可以卸载了之后重装一下Python，在第一个界面勾选以下选项： Add Python 3 8 to PATH
- slice - How slicing in Python works - Stack Overflow
Python slicing is a computationally fast way to methodically access parts of your data In my opinion, to be even an intermediate Python programmer, it's one aspect of the language that it is necessary to be familiar with
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