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Re:In CPython, types implemented in C are part of the type tree by legerdemain on Thursday December 24, 2020 @07:44PM (#25533097)
Sure, `reduce()` was removed from the standard library between Python 2 and Python 3. Here is Guido arguing that `lambda` and several other functions should be removed as well.[1]

[1] https://www.artima.com/weblogs/viewpost.jsp?thread=98196

Re:In CPython, types implemented in C are part of the type tree by klibertp on Thursday December 24, 2020 @08:24PM (#25533352)
> `reduce()` was removed from the standard library

Not true: it was moved from builtins to `functools` module, but it's still there.

Re:In CPython, types implemented in C are part of the type tree by legerdemain on Thursday December 24, 2020 @08:51PM (#25533485)
Please tell Guido that he got it wrong!

  > Only reduce will be removed from the 3.0 standard library. You can import it from functools.
Re:In CPython, types implemented in C are part of the type tree by geofft on Thursday December 24, 2020 @09:04PM (#25533545)
He did, in fact, misspeak. functools is part of the standard library, and was part of the standard library in 3.0, and contained reduce: https://github.com/python/cpython/blob/3.0/Lib/functools.py#...

What he meant to say is that it's removed from the list of builtins.