# Most common topics of GitHub Fortran projects **URL:** \ **Category:** Uncategorized\ **Created:** [March 7, 2025, 1:33pm UTC](https://fortran-lang.discourse.group/t/most-common-topics-of-github-fortran-projects/9312 "2025-03-07T13:33:56Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![Beliavsky](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Beliavsky](https://fortran-lang.discourse.group/u/Beliavsky)\ **Post date:** [March 7, 2025, 1:33pm UTC](https://fortran-lang.discourse.group/t/most-common-topics-of-github-fortran-projects/9312/1 "2025-03-07T13:33:56Z")
I wrote [Python functions](https://github.com/Beliavsky/Github-repo-metrics) to get data for a GitHub repo by scraping the landing page. GitHub does have an API to get such data, but I was hitting rate limits. For my list of Fortran codes, below are the topics that 5 or more repos listed, with the full list [here](https://github.com/Beliavsky/Github-repo-metrics/blob/main/topic_counts.txt). Topics (listed in the About section of a repo) are an under-used feature on GitHub, with many repos not specifying any topics. The handling of topics is quite literal, with `fortran-2008` and `fortran2008` considered distinct. A list of repos for each topic is [here](https://github.com/Beliavsky/Github-repo-metrics/blob/main/topic_counts_and_repos.txt). We knew lots of Fortranners were doing CFD :). The numbers do not reflect projects not in my list. Given a list of topics, one could query GitHub with `language:fortran topic:foo` to get overall numbers. Eventually I would like to create a web site for my list of codes, so that they can be filtered by topic, stars, license etc. There are about 2600 projects in the list, and scraping their data takes about 40 minutes. This could be done daily and saved, so that query results would be immediate. 615 fortran 186 fortran-package-manager 49 cfd 49 modern-fortran 48 fpm 48 python 45 mpi 42 simulation 41 linear-algebra 39 fortran2008 38 fortran-library 35 astrophysics 33 quantum-chemistry 30 fortran90 30 hpc 29 numerical-optimization 28 numerical-methods 27 optimization 27 physics 26 statistics 23 fortran2003 22 c 22 interpolation 21 computational-chemistry 21 high-performance-computing 21 scientific-computing 20 openmp 19 astronomy 19 chemistry 19 gpu 19 parallel-computing 18 density-functional-theory 18 fortran-tutorial 17 machine-learning 17 materials-science 17 molecular-dynamics 16 computational-fluid-dynamics 16 fluid-dynamics 16 library 16 ode 16 oop 15 geophysics 15 numerical-integration 14 atmospheric-modelling 14 fem 14 hdf5 14 lapack 14 parallel 14 seismology 13 blas 13 climate 13 electronic-structure 13 rng 13 turbulence 12 coarray-fortran 12 eigenvalues 12 finite-element-methods 12 navier-stokes 12 netcdf 12 plotting 11 constrained-optimization 11 earth-science 11 finite-difference 11 graphics 11 hydrology 11 matlab 11 modeling 11 monte-carlo 11 strings 11 unit-testing 10 automatic-differentiation 10 climate-model 10 cuda 10 differential-equations 10 finite-volume 10 fortran-2018 10 quantum-mechanics 10 special-functions 10 svd 10 tight-binding 9 coarray 9 deep-learning 9 dft 9 finite-elements 9 fortran-language 9 fortran95 9 hartree-fock 9 openacc 9 particle-physics 9 quadrature 9 random 8 benchmark 8 bindings 8 computational-physics 8 julia 8 least-squares 8 linux 8 monte-carlo-simulation 8 neural-network 8 nuclear-physics 8 plot 8 r 8 radiative-transfer 8 regex 7 cpp 7 database 7 f2py 7 fft 7 finite-element-analysis 7 fluid-simulation 7 fortran-modules 7 geodesy 7 gpu-computing 7 hydrodynamics 7 interoperability 7 matrix 7 molecular-modeling 7 music 7 nonlinear-equations 7 nonlinear-optimization 7 nwp 7 object-oriented 7 plasma-physics 7 regression 7 root-finding 7 runge-kutta 7 science 7 solver 7 sparse-matrix 7 spectroscopy 7 string-manipulation 7 thermodynamics 7 timer 7 vasp 7 weather 6 compiler 6 condensed-matter-physics 6 eigenvectors 6 finite-difference-method 6 fortran77 6 large-eddy-simulation 6 linear-equations 6 magnetohydrodynamics 6 numerical-weather-prediction 6 ode-solver 6 optimization-algorithms 6 parser 6 probability-distribution 6 quantum-espresso 6 sparse-linear-systems 6 splines 5 ab-initio 5 abaqus 5 astrodynamics 5 atmosphere 5 atmospheric-science 5 cmake 5 command-line 5 cplusplus 5 delaunay-triangulation 5 derivative-free-optimization 5 direct-numerical-simulation 5 fortran2018 5 gfortran 5 gpu-acceleration 5 hacktoberfest 5 linked-list 5 mesh 5 meteorology 5 model 5 molecular-simulation 5 numerical-analysis 5 numpy 5 object-oriented-fortran 5 object-oriented-programming 5 oceanography 5 parsing 5 pde-solver 5 performance 5 petsc 5 physics-simulation 5 random-number-generator 5 regular-expressions 5 solar-physics 5 string 5 tensor 5 testing 5 time-series 5 umat 5 unstructured-meshes 5 vector ---
**Author:** ![certik](https://yyz2.discourse-cdn.com/free1/user_avatar/fortran-lang.discourse.group/certik/32/4_2.png) [@certik](https://fortran-lang.discourse.group/u/certik)\ **Post date:** [March 7, 2025, 5:50pm UTC](https://fortran-lang.discourse.group/t/most-common-topics-of-github-fortran-projects/9312/2 "2025-03-07T17:50:30Z")
Perfect! Is there a way to figure out when a given repository was created? One way is to look at the first commit (although the commit might be older if the repo lived somewhere else first, such as locally on the author’s computer). I would like to plot some statistics in time, like the number of new github repositories created per month. ---
**Author:** ![Beliavsky](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Beliavsky](https://fortran-lang.discourse.group/u/Beliavsky)\ **Post date:** [March 7, 2025, 7:12pm UTC](https://fortran-lang.discourse.group/t/most-common-topics-of-github-fortran-projects/9312/3 "2025-03-07T19:12:14Z")
Yes, the API can return the `created_at` field. The Python script ```auto from github_util import repo_info dd = repo_info("Reference-LAPACK", "lapack") keys = ["description", "created_at", "updated_at", "pushed_at", "size", "watchers_count", "language", "forks_count", "open_issues", "topics"] for key in keys: print(key, dd[key]) ``` calling this [module](https://github.com/Beliavsky/Github-repo-metrics/blob/main/github_util.py) gives ```auto Successfully fetched data for Reference-LAPACK/lapack description LAPACK development repository created_at 2016-04-29T03:19:39Z updated_at 2025-03-07T15:04:26Z pushed_at 2025-03-07T15:04:21Z size 34183 watchers_count 1595 language Fortran forks_count 450 open_issues 153 topics ['blas', 'eigenvalues', 'eigenvectors', 'lapack', 'lapacke', 'linear-algebra', 'linear-equations', 'matrix-factorization', 'singular-values', 'svd'] ``` ---
**Author:** ![urbanjost](https://avatars.discourse-cdn.com/v4/letter/u/0ea827/32.png) [@urbanjost](https://fortran-lang.discourse.group/u/urbanjost)\ **Post date:** [March 7, 2025, 8:19pm UTC](https://fortran-lang.discourse.group/t/most-common-topics-of-github-fortran-projects/9312/4 "2025-03-07T20:19:21Z")
I never got that to work a long while back, so I have been using curl to grab the info as JSON via commands like ``` curl 'https://api.github.com/users/urbanjost/repos?per_page=1000' ``` but seeing your results I think I need to revisit how to best query the repository date. ---
**Author:** ![Beliavsky](https://avatars.discourse-cdn.com/v4/letter/b/ba8739/32.png) [@Beliavsky](https://fortran-lang.discourse.group/u/Beliavsky)\ **Post date:** [March 9, 2025, 2:07pm UTC](https://fortran-lang.discourse.group/t/most-common-topics-of-github-fortran-projects/9312/5 "2025-03-09T14:07:48Z")
One can create a list of the repos with the most stars for each topic, given data for individual repos and lists of repos by topic. A [Python script](https://github.com/Beliavsky/Github-repo-metrics/blob/main/xsort_by_stars.py) gives output such as the following, with the full output [here](https://github.com/Beliavsky/Github-repo-metrics/blob/main/topics_by_stars.txt). The license and the other topics of a repo are also shown on the same line. Only projects in my list are included, so the list is incomplete. ```auto Topic: fortran -------------------------------------------------- 1300 https://github.com/wrf-model/WRF - License: License - Additional Topics: weather, simulation, climate, model, forecast, nwp, wrf 1100 https://github.com/fortran-lang/stdlib - License: MIT license - Additional Topics: sorting, statistics, numpy, strings, stdlib, linear-algebra, hash, probability-distribution, blas, rng, quadrature, numerical-methods, lapack, fortran-library, fortran-package-manager, fortran-stdlib 1000 https://github.com/lfortran/lfortran - License: License - Additional Topics: library, jupyter, compiler, interactive, repl, jupyter-notebook, jupyter-kernels, fortran-compiler 808 https://github.com/mapmeld/fortran-machine - License: BSD-3-Clause license - Additional Topics: None 424 https://github.com/wavebitscientific/functional-fortran - License: BSD-3-Clause license - Additional Topics: functional-programming 422 https://github.com/modern-fortran/neural-fortran - License: MIT license - Additional Topics: machine-learning, deep-learning, neural-network, parallel, cnn Topic: cfd -------------------------------------------------- 399 https://github.com/Nek5000/Nek5000 - License: License - Additional Topics: flow, hpc, fluid, spectral, navier-stokes, high-order, sem, anl 272 https://github.com/ucns3d-team/UCNS3D - License: GPL-3.0 license - Additional Topics: simulation, compressible-fluid-dynamics, computational-fluid-dynamics, unstructured-meshes, compressible-flows 242 https://github.com/code-saturne/code_saturne - License: GPL-2.0 license - Additional Topics: c, fortran, finite-volume, navier-stokes, mpi-applications, pyqt, turbulence, hpc-applications 235 https://github.com/CGNS/CGNS - License: License - Additional Topics: c, fortran, hdf5, fluid-dynamics, cgns, parallel-io, cfd-general-notation 220 https://github.com/p-costa/CaNS - License: MIT license - Additional Topics: fortran, gpu, high-performance-computing, gpu-computing, turbulence, fluid-dynamics, computational-fluid-dynamics, fluid-simulation Topic: machine-learning -------------------------------------------------- 422 https://github.com/modern-fortran/neural-fortran - License: MIT license - Additional Topics: deep-learning, neural-network, fortran, parallel, cnn 284 https://github.com/cdslaborg/paramonte - License: UnknownLICENSE.md - Additional Topics: python, c, cpp, fortran, monte-carlo, matlab, machine-learning-algorithms, openmp, mpi, markov-chain, adaptive-learning, machine-learning-library, sampling, bayesian-inference, mcmc, monte-carlo-simulations, numerical-integration, bayesian-statistics 269 https://github.com/rouyang2017/SISSO - License: Apache-2.0 license - Additional Topics: compressed-sensing, symbolic-regression, material-science, big-data-analytics 101 https://github.com/Cambridge-ICCS/FTorch - License: MIT license - Additional Topics: python, deep-learning, fortran, torch, pytorch, interoperability, hacktoberfest 39 https://github.com/BerkeleyLab/inference-engine - License: License - Additional Topics: deep-learning, neural-network, inference, artificial-intelligence, neural-networks, artificial-neural-networks, feedforward-neural-network, ann, fortran-2023 Topic: optimization -------------------------------------------------- 331 https://github.com/libprima/prima - License: BSD-3-Clause license - Additional Topics: python, matlab, constrained-optimization, numerical-optimization, nonlinear-optimization, unconstrained-optimization, prima, powell, blackbox-optimization, modern-fortran, cobyla, derivative-free-optimization, simulation-based-optimization, bobyqa, newuoa, uobyqa, lincoa, zeroth-order-method 113 https://github.com/stfc/PSyclone - License: BSD-3-Clause license - Additional Topics: python, compiler, fortran, parallel-computing, high-performance-computing, finite-elements, finite-difference, finite-volume, hacktoberfest 100 https://github.com/pdfo/pdfo - License: BSD-3-Clause license - Additional Topics: python, fortran, simulation, matlab, constrained-optimization, numerical-optimization, nonlinear-optimization, optimization-algorithms, unconstrained-optimization, powell, blackbox-optimization, cobyla, derivative-free-optimization, zeroth-order-optimization, simulation-based-optimization, bobyqa, newuoa, uobyqa, lincoa 94 https://github.com/jacobwilliams/slsqp - License: License - Additional Topics: fortran, constrained-optimization, numerical-optimization, sqp, fortran-package-manager, nnls ```