TypeError: object of type 'itertools.chain' has no len() · Issue #91 · pyupio/safety · GitHub
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Bob Belderbos on X: "You can use itertools.chain to flatten a list of iterables (for more levels use recursion) #Python #tips https://t.co/ApqrxOg1IS" / X
A look at itertools chain method - DEV Community
Chain
Bug] Using `filter` in `itertools.chain` makes them both infer wrong types. · Issue #8226 · python/mypy · GitHub
A look at itertools chain method - DEV Community
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