IronLanguages/ironpython3

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Implementation of Python 3.x for .NET Framework that is built on top of the Dynamic Language Runtime.

Stars: 2.8k
Forks: 316
Open beginner issues: 0
Indexed issues: 302
Avg merge: 1d 9h
Merged PRs (30d): 1

Dominant language: C#
License: Apache-2.0
Last GitHub push: Aug 31, 2026
Latest indexed: Sep 20, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: good first issue

Beginner friendly Everything

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302 open issues indexed

Stack info lost when handling exception from thread Open

Difficulty 4/5 3-5 days Newbie friendliness 52/100

IronLanguages/ironpython3#2073 · Opened Jul 13, 2026
Stack frames missing in other threads when settrace used. Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

IronLanguages/ironpython3#2072 · 1 comment · Opened Jul 10, 2026
`os` string marshalling on Linux is inconsistent for unencodable characters Open

module-os posix

Difficulty 4/5 3-5 days Newbie friendliness 48/100

IronLanguages/ironpython3#2070 · 1 comment · Opened Jun 24, 2026
Support bytes version of os.environ Open

What's New In Python 3.2

Difficulty 3/5 1-2 days Newbie friendliness 55/100

IronLanguages/ironpython3#2069 · Opened Jun 23, 2026
re.ASCII flag can be set within the scope of a group Open

module-re What's New In Python 3.7

Difficulty 4/5 3-5 days Newbie friendliness 48/100

IronLanguages/ironpython3#2066 · Opened Jun 19, 2026
Debug/trace info not generated for DLR-based coroutines and async generators Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

IronLanguages/ironpython3#2065 · Opened Jun 18, 2026
test_typing.test_awaitable raises a StopIteration with the DLR based async implementation Open

.NET Core testing

Difficulty 4/5 3-5 days Newbie friendliness 48/100

IronLanguages/ironpython3#2054 · 3 comments · Opened Jun 15, 2026
`(yield)` produces a `NotImplementedError` instead of `SyntaxError` Open

Difficulty 3/5 1-2 days Newbie friendliness 50/100

IronLanguages/ironpython3#2049 · Opened Jun 6, 2026
Revert types.coroutine workaround in 3.6 Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

IronLanguages/ironpython3#2019 · Opened Mar 14, 2026
PEP 570 – Python Positional-Only Parameters Open

What's New In Python 3.8

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#2000 · 2 reactions · Opened Feb 22, 2026
license command fails to find license file on .NET tool install Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

IronLanguages/ironpython3#1997 · Opened Feb 18, 2026
re fails to match ranges starting with escaped - Open

module-re

Difficulty 3/5 1-2 days Newbie friendliness 55/100

IronLanguages/ironpython3#1978 · Opened Jan 21, 2026
`round` fails when encountering a `Single` Open

.NET interop

Difficulty 3/5 1-2 days Newbie friendliness 50/100

IronLanguages/ironpython3#1977 · 4 comments · Opened Jan 15, 2026
Issue: Cascading Errors in IronPython Parser Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

IronLanguages/ironpython3#1974 · 2 comments · Opened Oct 24, 2025
IronPython shows weak memory behaviors not visible in CPython Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1972 · Opened Sep 30, 2025
ironpython 3.4.2 wpf reference issue Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

IronLanguages/ironpython3#1970 · Opened Sep 24, 2025
Problem: Search Path Location is not Reasonable when Embedding in Other Scripting Engines Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1959 · 1 comment · Opened Jul 6, 2025
Feature Request: Implement a restricted mode Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1958 · 3 comments · Opened Jul 2, 2025
IronPython3 PlatformNotSupportedException in .NET WASM Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

IronLanguages/ironpython3#1952 · 2 comments · 1 reaction · Opened Apr 25, 2025
Add arguments to the compiler to make certain functions easier Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1934 · 1 comment · Opened Mar 26, 2025
Improvement of CLR array interface for ND cases Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1887 · Opened Jan 28, 2025
PythonType.Name from internal to public Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1868 · Opened Jan 9, 2025
Print Output Redirection not fully works Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1863 · 1 comment · Opened Jan 5, 2025
Unhelpful/misleading error message when inporting fails due to missing dependency Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

IronLanguages/ironpython3#1859 · 2 comments · Opened Jan 2, 2025
`FileStream` not suitable for `FileIO` on POSIX systems Open

CPython compatibility Mono

Difficulty 5/5 Over a week Newbie friendliness 32/100

IronLanguages/ironpython3#1846 · 1 comment · Opened Dec 20, 2024
TabCompletion console argument is ignored Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1845 · 1 comment · Opened Dec 18, 2024
OSError raised on opening a file with mismatched mode Open

CPython compatibility module-io

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1843 · 1 comment · Opened Dec 17, 2024
`eval` of a string starting with a blank line raises `SyntaxError` Open

builtins CPython compatibility

Difficulty 3/5 1-2 days Newbie friendliness 45/100

IronLanguages/ironpython3#1841 · Opened Dec 14, 2024
Parallel execution of multiple IronPython engines with one runtime Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1826 · 2 comments · Opened Dec 3, 2024
System.Array ordering comparisons are not working Open

.NET interop regression

Difficulty 3/5 1-2 days Newbie friendliness 35/100

IronLanguages/ironpython3#1822 · Opened Dec 2, 2024
64bits trading technology Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

IronLanguages/ironpython3#1818 · 5 comments · Opened Nov 26, 2024
Feature: Unify `System.Exception` with `BaseException` Open

.NET interop

Difficulty 5/5 Over a week Newbie friendliness 35/100

IronLanguages/ironpython3#1816 · 1 comment · Opened Nov 17, 2024
Overridden method called instead of base class method Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1808 · Opened Nov 8, 2024
Cannot install pip package if package contains native code that should be compiled during install Open

Difficulty 4/5 3-5 days Newbie friendliness 28/100

IronLanguages/ironpython3#1803 · Opened Jul 22, 2024
Error with running IronPython 3.4.1 on existing Windows .NET4.7.2 project Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

IronLanguages/ironpython3#1802 · 1 comment · Opened May 30, 2024
v3: Embedding in a web site - build warnings about WindowsBase Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1801 · 2 comments · Opened May 28, 2024
If call Python and there is an infinite loop in Python, where can set the timeout? Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

IronLanguages/ironpython3#1800 · 1 comment · Opened May 6, 2024
Extension binder fails to resolve overloads with nested generics Open

.NET interop

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1796 · 1 comment · Opened Apr 25, 2024
Install setup.py Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

IronLanguages/ironpython3#1794 · 6 comments · Opened Apr 19, 2024
big-data examples: using apache beam or spark Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

IronLanguages/ironpython3#1790 · Opened Apr 5, 2024
Ironpython version 3.4.1 Exception at runtime console application Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

IronLanguages/ironpython3#1789 · 1 comment · Opened Apr 4, 2024
Calling method with an argument of ReadOnlySpan<char> throws ArgumentException Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

IronLanguages/ironpython3#1788 · Opened Apr 3, 2024
IronPython.Runtime.Exceptions.ImportException: 'No module named 'xml.etree.ElementTree'' Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

IronLanguages/ironpython3#1787 · 5 comments · Opened Apr 1, 2024
The ipyc /out: option dose not change the output path of exe host Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1785 · Opened Mar 27, 2024
NullReferenceException while creating IronPython engine in referenced project Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1778 · 4 comments · Opened Feb 14, 2024
What is the class IronPython.Runtime.Types.OldInstance in IronPython3 Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

IronLanguages/ironpython3#1771 · 3 comments · Opened Jan 18, 2024
FirstOrDefault returns lambda function on empty collections from .NET 6 and forward Open

enhancement

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1761 · 8 comments · 1 reaction · Opened Dec 14, 2023
Incorrect value of sys.executable in dotnet tool IronPython.Console Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

IronLanguages/ironpython3#1756 · 2 comments · Opened Nov 21, 2023
Using IronPython shell from GNU Emacs doesn't work Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

IronLanguages/ironpython3#1753 · 1 comment · Opened Nov 14, 2023
Ipyc not including json in standalone executable Open

ipyc

Difficulty 4/5 3-5 days Newbie friendliness 45/100

IronLanguages/ironpython3#1748 · 4 comments · Opened Nov 4, 2023

IronLanguages/ironpython3

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