ssanderson.bsky.social
@ssanderson.bsky.social
Grammar-wise, this logic applies to anything in docs.python.org/3/reference/..., which also includes `in` and `not in`.
6. Expressions
This chapter explains the meaning of the elements of expressions in Python. Syntax Notes: In this and the following chapters, extended BNF notation will be used to describe syntax, not lexical anal...
docs.python.org
January 13, 2025 at 3:37 PM
Grammar-wise, this logic applies to anything in docs.python.org/3/reference/..., which also includes `in` and `not in`.
Even more surprising: `is` and `is not` is this same chaining logic, so you can chain them with other comparisons in non-obvious ways:
![A Python repl showing the following text:
In [3]: x = 5
In [4]: x is not None
Out[4]: True
In [5]: x is not None == True
Out[5]: False](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:zqybk75ugxkb6cnvasrm7kdq/bafkreihupj22cmioutmhyxxxwfeiipzeclwdcqeyxwqu43xmyvebsy7oem@jpeg)
January 13, 2025 at 3:32 PM
Even more surprising: `is` and `is not` is this same chaining logic, so you can chain them with other comparisons in non-obvious ways:
Last year’s rust survey showed VSCode being most used by a healthy margin: blog.rust-lang.org/images/2024-...
December 5, 2024 at 12:40 PM
Last year’s rust survey showed VSCode being most used by a healthy margin: blog.rust-lang.org/images/2024-...