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        "author": "Panos Mitzias",
        "author_email": "pmitzias@gmail.com",
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            "Programming Language :: Python",
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        "description": "# PyLOD\r\nPyLOD is a Python wrapper for exposing Linked Open Data from public SPARQL-served endpoints. It acts as an abstraction layer for the retrieval of structured data, such as classes, properties and individuals, without requiring any knowledge of SPARQL.\r\n\r\n## Getting Started\r\nPyLOD is a minimal module for Python (2.x. and 3.x).\r\n\r\n### Prerequisites\r\n\r\n[SPARQLWrapper](https://rdflib.github.io/sparqlwrapper/) - SPARQLWrapper is a simple Python wrapper around a SPARQL service to remotelly execute queries.\r\n\r\n### Installation\r\n\r\n* #### Manually\r\n\r\n 1. Install [SPARQLWrapper](https://github.com/RDFLib/sparqlwrapper).\r\n 2. Save `PyLOD.py` to your project's directory.\r\n\r\n* #### From PyPi\r\n\r\n ```\r\n pip install PyLOD\r\n ```\r\n\r\n## Usage\r\n**1. Import the PyLOD class and create a PyLOD class object.**\r\n```python\r\nfrom PyLOD import PyLOD\r\npylod = PyLOD()\r\n```\r\n\r\n**2. Provide a dictionary of desired namespaces**\r\n```python\r\nmy_namespaces={\r\n    \"dbo\": \"http://dbpedia.org/ontology/\",\r\n    \"dbp\": \"http://dbpedia.org/property/\"\r\n}\r\n\r\npylod.namespaces.set_namespaces(my_namespaces)\r\n```\r\n   This step is optional, since PyLOD already incorporates a set of known namespaces. To get the list of defined namespaces, use this:\r\n\r\n  ```python\r\nprint(pylod.namespaces.get_namespaces())\r\n```\r\n\r\n**3. Define a dictionary of SPARQL endpoints to be queried:**\r\n```python\r\nmy_endpoints={\r\n    \"DBpedia\": \"http://dbpedia.org/sparql\",\r\n    \"GeoLinkedData\": \"http://linkedgeodata.org/sparql\"\r\n}\r\n\r\npylod.endpoints.set_endpoints(my_endpoints)\r\n```\r\n   If no endpoints are defined, PyLOD will use a pre-defined set of known endpoints. To get the list of these endpoints, do this:\r\n\r\n  ```python\r\nprint(pylod.endpoints.get_endpoints())\r\n```\r\n\r\n**4. Use PyLOD's `expose` functions to retrieve structured data from the endpoints.**\r\nSet the optional argument `limit_per_endpoint` to limit the results per endpoint. For example:\r\n```python\r\n# Get entities of type owl:Class\r\nclasses = pylod.expose.classes(limit_per_endpoint=100)\r\n\r\n# Get the sub-classes of a specific class \r\nsub_classes = pylod.expose.sub_classes(super_class=\"dbo:Artist\")\r\n\r\n# Get instances of a specific class \r\ninstances = pylod.expose.instances_of_class(cls=\"dbo:Artist\", include_subclasses=True, limit_per_endpoint=50)\r\n\r\n# Execute custom SPARQL select query to all endpoints\r\nresults = pylod.sparql.execute_select_to_all_endpoints(query=\"SELECT * WHERE {?s ?p ?o}\")\r\n```\r\n\r\n### Expose functions:\r\n* __classes()__ - Returns class entities\r\n* __sub_classes()__ - Returns the sub-classes of a given class \r\n* __super_classes()__ - Returns the super-classes of a given class \r\n* __equivalent_classes()__ - Returns the equivalent classes of a given class \r\n* __disjoint_classes()__ - Returns the disjoint classes of a given class \r\n* __sub_properties()__ - Returns the sub-properties of a given property \r\n* __super_properties()__ - Returns the super-properties of a given property \r\n* __triples()__ - Allows the retrieval of triples within the pattern (subject-predicate-object)\r\n* __subjects()__ - Returns the subjects of a given predicate-object pair \r\n* __predicates()__ - Returns the predicates of a given subject-object pair\r\n* __objects()__ - Returns the objects of a given subject-predicate pair\r\n* __instances_of_class()__ - Returns instances of a given class type\r\n* __labels()__ - Returns labels of a given entity, with an optional language argument\r\n\r\n### SPARQL functions:\r\n* __execute_select()__ - Allows the execution of a custom SPARQL select query to a given endpoint URL\r\n* __execute_select_to_all_endpoints()__ - Allows the execution of a custom SPARQL select query to all endpoints defined in `pylod.endpoints.get_endpoints()`\r\n* __is_active_endpoint()__ - Checks if a given endpoint URL is alive and responds to SPARQL queries\r\n\r\n## Documentation\r\n[The official webpage](http://pmitzias.com/PyLOD) - [The Docs](http://pmitzias.com/PyLOD/docs.html)\r\n\r\n## Authors\r\n* [Panos Mitzias](http://pmitzias.com) - Design and development\r\n* [Stratos Kontopoulos](http://stratoskontopoulos.com) - Contribution to the design\r\n\r\n## Powered by\r\n* [Centre for Research & Technology Hellas - CERTH](https://www.certh.gr/root.en.aspx)\r\n* [Multimedia Knowledge & Social Media Analytics Laboratory - MKLab](http://mklab.iti.gr/)\r\n\r\n## Applications\r\nPyLOD has been deployed in the following projects:\r\n\r\n* [PERICLES](http://project-pericles.eu/)\r\n* [ROBORDER](http://roborder.eu/)\r\n* [TENSOR](https://tensor-project.eu/)\r\n* [SUITCEYES](http://suitceyes.eu/)\r\n\r\n\r\n",
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