support python 3.14 (#733)

Co-authored-by: Christopher Doris <github.com/cjdoris>

Author: cjdoris

.github/workflows/tests.yml

@@ -73,11 +73,11 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        pyversion: ['3.13', '3.10']
+        pyversion: ['3', '3.10']
         juliaexe: ["@JuliaPkg"]
         include:
         - os: ubuntu-latest
-          pyversion: '3.13'
+          pyversion: '3'
           juliaexe: julia
     env:
       MANUAL_TEST_PROJECT: /tmp/juliacall-test-project

CHANGELOG.md

@@ -1,5 +1,8 @@
 # Changelog
 
+## Unreleased
+* Python 3.14+ is now supported.
+
 ## 0.9.30 (2025-11-18)
 * Maximum supported Python version is now 3.13 ([see the FAQ](https://juliapy.github.io/PythonCall.jl/stable/faq/#faq-python-314) for why).
 

CondaPkg.toml

@@ -10,10 +10,9 @@ version = "<=julia"
 
 [deps.python]
 build = "**cpython**"
-version = ">=3.10,<3.14"
+version = ">=3.10,!=3.14.0,!=3.14.1,<4"
 
 [dev.deps]
 matplotlib = ""
 numpy = ""
 pyside6 = ""
-python = "<3.14"

docs/src/faq.md

@@ -1,19 +1,5 @@
 # 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: