Pattern Matching
Profile tree
Data from GitHub API- Contributions: 370. Past 12 months.
- Followers: 27,063. People who follow you.
- Total stars: 1,653. Across all repos.
- Following: 4. People you follow.
- Public repos: 12. Owned, non-fork.
A living snapshot
Every leaf is a headline number from Guido van Rossum’s public GitHub. The canopy fills out as the work grows - sway and all.
- 370 Contributions Past 12 months
- 27K Followers People who follow you
- 1,653 Total stars Across all repos
- 4 Following People you follow
- 12 Public repos Owned, non-fork
Data from GitHub API · refreshed in real time
What your GitHub says
Based on public GitHub activity · how this is calculated
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HTML is the largest language share across analyzed repositories, at 57%.
High confidence
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Public visibility is concentrated: the top 3 analyzed repositories account for 80% of total stars, led by patma.
Medium confidence
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Public GitHub activity is review-heavy: code reviews account for 53% of tracked contribution activity.
Medium confidence
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Most analyzed repositories (7 of 12) show no public activity in over a year.
Medium confidence
Profile health
Signals from analyzed public data
Developing
- 370 contributions in the trailing year
Needs work
- 1 of 12 analyzed repositories are actively maintained
- 1,653 stars across analyzed repositories
Needs work
- 1 of 12 analyzed repositories have no description
- 12 of 12 have no topic tags
Needs work
- 1 of 12 analyzed repositories were pushed to in the last 6 months
- 7 show no public activity in over a year
Strong
- 47 pull requests and 193 code reviews in the trailing year
- 37 repositories starred
Recruiter snapshot
A skim of public evidence, not a hiring judgement
Largest language shares across analyzed repositories
Analyzed repositories rated established or maintained
Public pull requests and code reviews in the trailing year
Summed across analyzed repositories
Calendar months with at least one tracked contribution
Strongest signals
- 47 pull requests and 193 code reviews in the trailing year
- HTML 57.1%
- C 27.7%
- Python 12.2%
- Roff 1.2%
- Makefile 1.1%
- Rez 0.3%
- Other 0.4%
- Backend 100
- Data 100
- Frontend 25
- DevOps 17
- Embedded 17
- Mobile 0
- AI 0
- Security 0
- Game Dev 0
Across their public repositories, Guido van Rossum works mainly in HTML, which accounts for roughly 57% of their committed code, alongside C and Python. They have 12 public repositories, which together have earned 1,653 stars, led by patma at 1,041. Their activity over the last twelve months totals 370 contributions, including a longest run of 14 consecutive active days. Guido van Rossum has been on GitHub since 2012 and is followed by 27,063 developers.
This overview is generated from Guido van Rossum’s public GitHub activity at the time of the last refresh. Figures cover public repositories and the trailing twelve months of contributions.
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01
Add topics to abc-unix
Low impactabc-unix has no topic tags, making its technology harder to discover.
abc-unix → -
02
Add topics to guidos_time_machine
Low impactguidos_time_machine has no topic tags, making its technology harder to discover.
guidos_time_machine → -
03
Add topics to old-demos
Low impactold-demos has no topic tags, making its technology harder to discover.
old-demos → -
04
Add topics to ctok
Low impactctok has no topic tags, making its technology harder to discover.
ctok → -
05
Add topics to pythonlabs
Low impactpythonlabs has no topic tags, making its technology harder to discover.
pythonlabs →
How these are calculated: see the methodology page .
The original ABC language (Python's predecessor), from 1991
Guido's time machine
Very old demos and examples removed from the cpython repo
Expose CPython's tokenizer as a Python class
Reconstructed source code for pythonlabs.com
BDFL website
Automatically exported from code.google.com/p/ballot-box
No description provided.
Structured RAG: ingest, index, query
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patma 1,041 ★
Pattern Matching
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abc-unix 174 ★
The original ABC language (Python's predecessor), from 1991
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guidos_time_machine 105 ★
Guido's time machine
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old-demos 100 ★
Very old demos and examples removed from the cpython repo
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ctok 63 ★
Expose CPython's tokenizer as a Python class
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c-parser 61 ★
A partial parser for C statements and expression
Public visibility is concentrated in a small number of projects - these are the strongest candidates to feature on a resume.
Leading repository: patma (1,041 stars, 1,653 total across analyzed repositories)
Technology breakdown
Derived from repository languages and topics - horizontal bars, never a pie.
Languages
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HTML 57%
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C 28%
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Python 12%
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Roff 1%
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Makefile 1%
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Rez 0%
README, contributing-guide and GitHub Actions badges below are detected by exact filename on each repository’s default branch - they report presence, not quality.
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patma ArchivedPopularity 100Discoverability 25Maintenance 0README No contributing guide No CI workflow
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gvanrossum.github.io MaintainedPopularity 2Discoverability 25Maintenance 85README No contributing guide No CI workflow
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abc-unix DevelopingPopularity 17Discoverability 25Maintenance 40README No contributing guide No CI workflow
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pythonlabs DevelopingPopularity 3Discoverability 25Maintenance 40README No contributing guide CI: 2 workflows
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guidos_time_machine DormantPopularity 11Discoverability 50Maintenance 0README No contributing guide No CI workflow
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old-demos DormantPopularity 11Discoverability 50Maintenance 0README No contributing guide No CI workflow
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ctok DormantPopularity 6Discoverability 25Maintenance 0README No contributing guide No CI workflow
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c-parser ArchivedPopularity 6Discoverability 25Maintenance 0No README No contributing guide No CI workflow
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pythonlabs-com-azure DormantPopularity 2Discoverability 25Maintenance 0README No contributing guide No CI workflow
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ballot-box DormantPopularity 2Discoverability 25Maintenance 0No README No contributing guide No CI workflow
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pep550 DormantPopularity 1Discoverability 25Maintenance 0No README No contributing guide No CI workflow
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mypy-dummy DormantPopularity 1Discoverability 25Maintenance 0No README No contributing guide No CI workflow
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Repository explorer
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| Name | Language | Stars | Forks | Size | Updated |
|---|
No repositories match those filters.
Coding statistics
→
Contribution patterns
→
By year
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2026
240
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2025
195
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2024
389
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2023
697
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2022
804
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2021
555
By day of week
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Sun
28
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Mon
62
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Tue
54
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Wed
58
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Thu
74
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Fri
51
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Sat
43
Best coding day: Thu
By month (last 12)
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Oct
54
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Nov
52
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Dec
24
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Jan
27
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Feb
55
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Mar
36
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Apr
50
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May
24
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Jun
10
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Jul
11
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Aug
19
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Sep
8
GitHub journey
→
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November 2012
Joined GitHub
Created the @gvanrossum account.
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March 2015
Created first repository
Published ballot-box, the oldest repository still on the account.
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March 2015
First starred repository
ballot-box is the earliest-created repository to have earned stars.
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June 2022
Most productive year: 2022
804 contributions recorded in 2022, more than any other year on record.
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September 2022
Reached 10 repositories
old-demos was the 10th public repository created.
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November 2025
Latest repository
abc-unix is the most recently created repository.
Developer evolution
Your GitHub career, year by year.
→
Shifted from Python to HTML.
- Repos this year
- 1
- Total repos
- 2
- Stars, as of today
- 39
Shifted from HTML to Python.
- Repos this year
- 3
- Total repos
- 5
- Stars, as of today
- 87
Went deeper into Python.
- Repos this year
- 2
- Total repos
- 11
- Stars, as of today
- 1.5k
- Contributions
- 804
Shifted from Python to C.
- Repos this year
- 1
- Total repos
- 12
- Stars, as of today
- 1.7k
- Contributions
- 195
Built from gvanrossum’s public, non-fork repositories. Star totals reflect current counts, not historical snapshots.
Achievements
3 / 9 unlocked
Open source activity
Language evolution
The primary languages of repositories created each year.
- Python
- HTML
- HTML
- Python
- C
- Python
- Python
- C
Repository growth
Repositories created per year, and the running total.
Language tree
Built automatically from repository languages and topics.
Programming Languages →
- HTML
- C
- Python
- Roff
- Makefile
- Rez