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Merged
merged 1 commit into from
Nov 14, 2025
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remove support for python 3.14 #723

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2 changes: 1 addition & 1 deletion CondaPkg.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@ version = "<=julia"

[deps.python]
build = "**cpython**"
version = ">=3.10,<4"
version = ">=3.10,<3.14"

[dev.deps]
matplotlib = ""
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14 changes: 14 additions & 0 deletions docs/src/faq.md
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@@ -1,5 +1,19 @@
# FAQ & Troubleshooting

## [Why is Python 3.14 not supported?](@id faq-python-314)

Python has always had a mechanism for detecting recursion errors (stack overflows).
The heuristics for this have been made stricter in Python 3.14, which means that any
system which uses a non-standard stack and calls Python from it is likely to crash.
Julia is such a system because each task has its own stack.

There are discussions among Python developers about how to make the situation better but
for now, PythonCall is highly likely to crash when using Python 3.14, so for the time
being it is not supported.

See the discussion and linked GitHub issue here:
https://discuss.python.org/t/python-3-14-0-is-incompatible-with-stack-switching-systems-what-do-we-do/104880.

## [Can I use PythonCall and PyCall together?](@id faq-pycall)

Yes, you can use both PyCall and PythonCall in the same Julia session. This is platform-dependent:
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