{"id":18713438,"url":"https://github.com/renatoalencar/lisper","last_synced_at":"2025-11-09T23:30:21.725Z","repository":{"id":78938348,"uuid":"204589522","full_name":"renatoalencar/lisper","owner":"renatoalencar","description":"A very simple implementation of Lisp built in Python","archived":false,"fork":false,"pushed_at":"2020-11-01T05:01:59.000Z","size":8,"stargazers_count":2,"open_issues_count":0,"forks_count":0,"subscribers_count":3,"default_branch":"master","last_synced_at":"2024-12-28T08:43:15.552Z","etag":null,"topics":["interpreter","lecture","lisp","lisp-interpreter","python"],"latest_commit_sha":null,"homepage":"","language":"Python","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"mit","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/renatoalencar.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2019-08-27T01:01:11.000Z","updated_at":"2021-04-12T14:20:42.000Z","dependencies_parsed_at":"2023-08-28T16:15:10.758Z","dependency_job_id":null,"html_url":"https://github.com/renatoalencar/lisper","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/renatoalencar%2Flisper","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/renatoalencar%2Flisper/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/renatoalencar%2Flisper/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/renatoalencar%2Flisper/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/renatoalencar","download_url":"https://codeload.github.com/renatoalencar/lisper/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":239576790,"owners_count":19662114,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["interpreter","lecture","lisp","lisp-interpreter","python"],"created_at":"2024-11-07T12:49:06.849Z","updated_at":"2025-11-09T23:30:21.677Z","avatar_url":"https://github.com/renatoalencar.png","language":"Python","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Lisper\n\nA very simple Lisper interpreter that supports only numbers.\n\n## Introduction\n\nI was there, on a sunday morning watching videos on YouTube when I get to [this Lecture by\nHal Abelson](https://youtu.be/-J_xL4IGhJA) on a introduction to Lisp. Is quite simple, it's almost an introduction to\nprogramming itself and introduces the syntax and some operators of Lisp. It also introduces\nthe Haron of Alexandria algorithm of solving a square root of a number. So I thought: \"Why\nnot build a Lisp interpreter that supports the exactly same specs he introduces on this\nLecture?\".\n\nAnd so I spent my sunday writing a very simple interpreter, and that here is.\n\n## Running\n\nThe example in the lecture can be found in the file [sqrt.lisp](./sqrt.lisp), just pass the file name\nas an argument like this:\n\n```sh\n$ ./lisper.py sqrt.lisp\n1.4142135623746899\n```\n\nYou can run `./lisper.py -h` to get some other options available like printing the AST or the\nresulting value of each evaluation.\n\n## Issues\n\nThis is a simple implementations, so here are a few known issues:\n\n* It's not optimized;\n* Only support arithmetic operations;\n* There is no interop with Python;\n* Does not keep track of lines and columns on errors.\n\n## License\n\n[MIT](./LICENSE)","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frenatoalencar%2Flisper","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Frenatoalencar%2Flisper","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Frenatoalencar%2Flisper/lists"}