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Terms boolean expressions to query containers

Project description

Boolean Search for Python Containers

Library to make simple boolean queries for python string containers (e.g. sets or lists). E.g. query built from expression 'Alice & Bob & ~John' can be applied to any container to check if it contains strings 'Alice' and 'Bob' and not contains 'John'.

Base example:

#!/usr/bin/env python

from termsquery import TermsQuery

query = TermsQuery('Alice & (Bob | "Unknown user")')

container1 = {'Alice', 'Unknown user'}
container2 = {'Bob'}

assert True == query(container1)
assert False == query(container2)

Library can be used to tag collection of documents: create query for each tag and apply that query for document words.

Simple tagging example:

#!/usr/bin/env python

from termsquery import TermsQuery

tags = {
    'A-not-B' : TermsQuery('A & ~B'),
    'X-and-Y' : TermsQuery('X & Y')
}

docs = [
    'A is the first letter of ...',
    'A and B letters, X and Y letters'
]

for doc in docs:
    words = doc.split()
    doc_tags = [name for (name, query) in tags.items() if query(words)]
    print(doc, doc_tags)

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