{"id":27059,"library":"igwn-ligolw","title":"IGWN LIGO Light-Weight XML I/O Library","description":"A Python library for reading, writing, and manipulating LIGO Light-Weight XML (LIGO_LW) documents. Version 2.1.1 requires Python >=3.9. Development is active on GitHub.","status":"active","version":"2.1.1","language":"python","source_language":"en","source_url":"https://git.ligo.org/igwn/igwn-ligolw","tags":["ligo","xml","gravitational-waves"],"install":[{"cmd":"pip install igwn-ligolw","lang":"bash","label":"PyPI install"}],"dependencies":[],"imports":[{"wrong":"import ligolw","symbol":"ligolw","correct":"import igwn_ligolw"}],"quickstart":{"code":"import ligolw\nfrom ligolw import utils\nload_doc = utils.load_filename('test.xml', contenthandler=ligolw.LIGOLWContentHandler)\nprint(load_doc)","lang":"python","description":"Load a LIGO_LW XML file and print the document object."},"warnings":[{"fix":"Uninstall the old package and install igwn-ligolw.","message":"The package was renamed from 'python-ligo-lw' to 'igwn-ligolw'. Old installations will not update automatically.","severity":"breaking","affected_versions":">=2.0.0"},{"fix":"Use 'import ligolw' directly.","message":"The top-level module 'ligolw' is used; do not import from 'igwn.ligolw'.","severity":"deprecated","affected_versions":">=2.0.0"},{"fix":"Install system dependencies: sudo apt-get install libxml2-dev libxslt1-dev (Linux) or use conda.","message":"The library relies on external dependencies like 'libxml2' for some features. Missing system libraries can cause import errors.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"search_vec":"'2.1.1':26 '3.9':29 'activ':32 'develop':30 'document':24 'github':34 'gravit':38 'gravitational-wav':37 'i/o':7 'igwn':1 'librari':8,11 'light':4,19 'light-weight':3,18 'ligo':2,17,22,35 'lw':23 'manipul':16 'python':10,28 'read':13 'requir':27 'version':25 'wave':39 'weight':5,20 'write':14 'xml':6,21,36","created_at":"2026-05-01T17:44:17.512787+00:00","updated_at":"2026-05-01T17:44:17.512787+00:00","problems":null,"ecosystem":"pypi","meta_description":null,"install_score":null,"quickstart_score":null,"quickstart_tag":null,"pypi_latest":null,"cli_name":"","cli_version":null,"type":"library","homepage":null,"github":null,"docs":null,"changelog":null,"pypi":"https://pypi.org/project/igwn-ligolw/","npm":null,"openapi_spec":null,"status_page":null,"smithery":null,"categories":["data","serialization"],"base_url":null,"auth_type":null,"provenance":{"verified_status":"passing","verified_at":"2026-06-30","last_verified":"2026-06-30","next_check":"2026-07-30","install_tag":null}}