NumPy 2.4.0 Release Notes

Highlights

We’ll choose highlights for this release near the end of the release cycle.

Compatibility notes

• NumPy’s C extension modules have begun to use multi-phase initialisation, as defined by PEP 489. As part of this, a new explicit check has been added that each such module is only imported once per Python process. This comes with the side-effect that deleting numpy from sys.modules and re-importing it will now fail with an ImportError. This has always been unsafe, with unexpected side-effects, though did not previously raise an error.

  (gh-29030)

Changes

• Multiplication between a string and integer now raises OverflowError instead of MemoryError if the result of the multiplication would create a string that is too large to be represented. This follows Python’s behavior.

  (gh-29060)