Dev tools · alternatives · 2026
24 alternatives to Python 3 with backwards compatibility features
Porting Python code from version 2.x to 3.x is not a simple task. To help, I built a version of Python 3.6 that includes backwards compatibility features. Most important is the mixing of bytes and str objects and comparisons. For example, in vanilla Python 3: >>> b'foo' + 'bar' Traceback (most recent call last): File "", line 1, in TypeError: can't concat bytes to str >>> None ", line 1, in TypeError: unorderable types: NoneType() >> b'foo' + 'bar' sys:1: DeprecationWarning: encoding bytes to str 'foobar' >>> None < 'hi' __main__:1: DeprecationWarning: default compare is depreciated True…
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Python 3 with backwards compatibility features launched in 2016; newer entries below may have overtaken it.
- 1
Python to python compiler that allows you to use Python 3.6 features in older versions. - nvbn/py-backwards
2017 · github.com · its alternatives →
- 2
A tool for refurbishing and modernizing Python codebases - dosisod/refurb
2022 · github.com · its alternatives →
- 3
a python-like language with hindley-milner-like type system, which is compiled to c - alehander92/Airtight
2015 · github.com · its alternatives →
- 4SR
Python 3 is awesome. Upgrade today!
2017 · whypy3.com · its alternatives →
- 5
Hi HN! This is my pet project, written from scratch because there is so much to discover and learn in the process. The focus is on simplicity and incremental updates. Progress is slow because I do not have much spare time to work on this, but I would love to hear some feedback. Regards
2022 · github.com · its alternatives →
- 6
Rich is a Python library for rich text and beautiful formatting in the terminal. - Textualize/rich
2020 · github.com · its alternatives →
- 7
Gain insights into Python 3's new syntax, data types, strings, bytes, and iterators through interactive coding samples. Upgrade your Python skills with hands-on, real-time code modifications.
2016 · educative.io · its alternatives →
- 8
Debugging-friendly exceptions for Python. Contribute to cknd/stackprinter development by creating an account on GitHub.
2019 · github.com · its alternatives →
- 9
Greetings! A 2.5 weekends project to teach myself newer Python features (>= 3.10). Conditions are written as Lambda expressions that annotate parameters and return types, and coexist with type annotations. Symbols to share values between conditions are also supported to a limited extend.
2022 · github.com · its alternatives →
- 10
Rapid fuzzy string matching in Python using various string metrics - rapidfuzz/RapidFuzz
2020 · github.com · its alternatives →
- 11
Python utilities for writing cross-version compatible libraries - tmkontra/compatlib
2021 · github.com · its alternatives →
- 12IW
My book titled "Python re(gex)?" is free to download through this weekend [1][2] The book covers both 're' and 'regex' modules, has plenty of examples and chapters also have cheatsheets and exercises. Code snippets, exercises, sample chapters, etc are available on GitHub repo [3] I used pandoc+xelatex [4] to generate the pdf. [1] https://gumroad.com/l/py_regex [2] https://leanpub.com/py_regex [3] https://github.com/learnbyexample/py_regular_expressions [4]…
2019 · its alternatives →
- 13
An on-disk B+tree for Python 3. Contribute to NicolasLM/bplustree development by creating an account on GitHub.
2018 · github.com · its alternatives →
- 14
I built Copapy as an experiment: Can Python be used for hard real-time systems? Instead of an interpreter or JIT, Copapy builds a computation graph by tracing Python code and uses a custom copy-and-patch compiler. The result is very fast native code with no GC, no syscalls, and no memory allocations at runtime. The copy-and-patch compiler currently supports x86_64 as well as 32- and 64-bit ARM. It comes as small Python package with no other dependencies - no cross-compiler, nothing except Python. The current focus is on robotics and control systems in general. This project is early but…
Feb 2026 · github.com · its alternatives →
- 15PT
Hi HN, I'm excited to share Python-Type-Challenges, a collection of hands-on, interactive challenges designed to help Python developers master type annotations. Whether you're new to type hints or looking to deepen your understanding, these exercises provide a fun and educational way to explore Python's type system. I'd love to get your feedback and contributions! https://github.com/laike9m/Python-Type-Challenges
2023 · python-type-challenges.zeabur.app · its alternatives →
- 16
Python library for text case conversions (https://pypi.org/project/textcase) - zobweyt/textcase
2025 · github.com · its alternatives →
- 17
Recently, I write an interpreter for subset of Python using Go. I haven't seen source code of CPython, all is just written according to my understanding of Python so there may be some unusual things. Hope you can play fun with it. Any suggestion is welcome, glad to get some feedback.
2023 · github.com · its alternatives →
- 18
Doing dirty (but extremely useful) things with equals. - samuelcolvin/dirty-equals
2022 · github.com · its alternatives →
- 19
DEPCRECATED/UNMAINTAINED - A Python library to make debugging with print statements simpler and more effective. - alixander/PyScribe
2015 · github.com · its alternatives →
- 20
A variant of include_bytes!/include_str! with compile-time deflation and runtime lazy inflation. (WARNING: the final compressed size may be larger with double compression!) - SOF3/include-flate
2019 · github.com · its alternatives →
- 21
a restricted python to javascript / c# / go / ruby compiler - pseudo-lang/pseudo-python
2016 · github.com · its alternatives →
- 22
an extensible multi-markup reader in less than 100 lines of python code - markup.py
2020 · gist.github.com · its alternatives →
- 23AS
Took a stab at building my own string diffing JS package. I built an interactive demo for TypeIt’s website (https://typeitjs.com/build-your-own) a while back. The approach I took to handle user input necessitated a way to calculate the difference between the versions of a user’s text input. I searched around for a package to help me out and found a couple of good ones (like fast-diff), but I either didn’t really like their API or didn’t want to take on a huge new dependency. Instead, I thought I’d give it a shot myself (famous last words). I dove into it having no real formal…
2022 · its alternatives →
- 24
expect-like tools over a Python stream
2016 · pypi.python.org · its alternatives →
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- Refurb – A tool for refurbishing and modernizing Python codebases alternatives
- A Python with Hindley-Milner-like type annotations, compiling to C alternatives
- Shareable reasons to upgrade to Python 3 alternatives
- I am building a new Python library to read/write PDF files alternatives
- Python lib for rich text, markdown, tables, etc. in the terminal alternatives
Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →