From 5e4aee62e7a746491edd9077c0bdd959c444960b Mon Sep 17 00:00:00 2001
From: jwansek <eddie.atten.ea29@gmail.com>
Date: Wed, 24 Nov 2021 16:31:46 +0000
Subject: added a simple search system
---
database.py | 349 +++++++++++++++++++++++++++++++-----------------------------
1 file changed, 180 insertions(+), 169 deletions(-)
(limited to 'database.py')
diff --git a/database.py b/database.py
index 0a804de..875d22e 100644
--- a/database.py
+++ b/database.py
@@ -1,169 +1,180 @@
-from dataclasses import dataclass
-import math as maths
-import sqlite3
-import tf_idf
-import os
-
-class DatabaseCursor(sqlite3.Cursor):
- def __init__(self, *args, **kwargs):
- super().__init__(*args, **kwargs)
-
- def __enter__(self):
- return self
-
- def __exit__(self, type, value, traceback):
- self.close()
-
-@dataclass
-class Database:
- db_path:str = os.path.join(".", "wikibooks.db")
-
- def __enter__(self):
- if not os.path.exists(self.db_path):
- self.__connection = sqlite3.connect(self.db_path)
- self.__build_db()
- else:
- self.__connection = sqlite3.connect(self.db_path)
-
- self.__connection.create_function('log', 1, maths.log10)
- self.__connection.create_function("log_tf", 1, tf_idf.calc_log_tf)
- return self
-
- def __exit__(self, type, value, traceback):
- self.__connection.commit()
- self.__connection.close()
-
- def __build_db(self):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("""
- CREATE TABLE IF NOT EXISTS `documents` (
- `document_id` INTEGER PRIMARY KEY,
- `document_name` TEXT NOT NULL
- );""")
- cursor.execute("""
- CREATE TABLE IF NOT EXISTS `vocabulary` (
- `vocabulary_id` INTEGER PRIMARY KEY,
- `term` TEXT NOT NULL
- );""")
- cursor.execute("""
- CREATE TABLE IF NOT EXISTS `term_frequency` (
- `vocabulary_id` INT UNSIGNED NOT NULL,
- `document_id` INT UNSIGNED NOT NULL,
- `frequency` INT UNSIGNED NOT NULL,
- FOREIGN KEY (`vocabulary_id`) REFERENCES `vocabulary`(`vocabulary_id`),
- FOREIGN KEY (`document_id`) REFERENCES `documents`(`document_id`),
- PRIMARY KEY(`vocabulary_id`, `document_id`)
- );""")
- cursor.execute("CREATE UNIQUE INDEX unique_terms on vocabulary (term);")
-
- def append_documents(self, documents):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.executemany("INSERT INTO `documents` (document_name) VALUES (?);", [(doc, ) for doc in documents])
-
- def get_document_name_by_id(self, id_):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT `document_name` FROM `documents` WHERE `document_id` = ?;", (id_, ))
- return cursor.fetchone()[0]
-
- def get_document_id_by_name(self, document_name):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT `document_id` FROM `documents` WHERE `document_name` = ?", (document_name, ))
- return cursor.fetchone()[0]
-
- def get_num_documents(self):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT COUNT(*) FROM documents;")
- return cursor.fetchone()[0]
-
- def append_terms(self, terms):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.executemany("INSERT OR IGNORE INTO vocabulary(term) VALUES (?);", [(term, ) for term in terms])
-
- def append_terms_in_document(self, document_id, counter):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.executemany("""
- INSERT INTO `term_frequency`(`vocabulary_id`, `document_id`, `frequency`)
- VALUES ((SELECT `vocabulary_id` FROM `vocabulary` WHERE `term` = ?), ?, ?)
- """, [(i[0], document_id, i[1]) for i in counter.items()])
-
- def build_tf_idf_table(self):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- # cursor.execute("DROP VIEW IF EXISTS `tf_idf`;")
- # cursor.execute("DROP VIEW IF EXISTS `vocab_count`;")
- # i wish i could find a way to do this with a single view but alas i am
- # not good enough at SQL
- cursor.execute("""
- CREATE VIEW IF NOT EXISTS `vocab_count` AS
- SELECT vocabulary_id,
- COUNT(vocabulary_id) AS vocabulary_count
- FROM term_frequency
- GROUP BY vocabulary_id;
- """)
- cursor.execute("""
- CREATE VIEW IF NOT EXISTS `tf_idf` AS SELECT
- `term_frequency`.`vocabulary_id` AS `vocabulary_id`,
- `document_id`,
- `term_frequency`.`frequency`,
- LOG_TF(`frequency`) AS tf,
- (SELECT COUNT(`document_id`) FROM `documents`) AS n,
- `vocab_count`.`vocabulary_count` AS df,
- (SELECT LOG(CAST(COUNT(`document_id`) AS REAL) / `vocab_count`.`vocabulary_count`) FROM documents) AS idf,
- LOG_TF(`frequency`) * (SELECT LOG(CAST(COUNT(`document_id`) AS REAL) / `vocab_count`.`vocabulary_count`) FROM documents) AS tf_idf
- FROM `term_frequency`
- INNER JOIN `vocab_count`
- ON `vocab_count`.`vocabulary_id` = `term_frequency`.`vocabulary_id`
- ;""")
-
- def get_term_frequencies(self):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT * FROM `term_frequency`;")
- return cursor.fetchall()
-
- def append_tf_idf_table(self, tfs):
- # print([(i[0], i[1], i[2], i[0], i[0], i[2]) for i in tfs][1])
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.executemany("""
- INSERT INTO `tf_idf`(`vocabulary_id`, `document_id`, `tf`, `idf`, `tf_idf`)
- VALUES (
- ?, ?, ?,
- (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?),
- (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?) * ?)
- """, [(i[0], i[1], i[2], i[0], i[0], i[2]) for i in tfs])
-
- def append_tf_idf_table_single(self, vocabulary_id, document_id, tf):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("""
- INSERT INTO `tf_idf`(`vocabulary_id`, `document_id`, `tf`, `idf`, `tf_idf`)
- VALUES (
- ?, ?, ?,
- (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?),
- (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?) * ?)
- """, (vocabulary_id, document_id, tf, vocabulary_id, vocabulary_id, tf))
-
- def test_log(self, to_log):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT LOG(?);", (to_log, ))
- return cursor.fetchone()
-
- def test_tf_log(self, to_tf):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT LOG_TF(?);", (to_tf, ))
- return cursor.fetchone()
-
- def get_tf_idf_table(self):
- with self.__connection.cursor(factory = DatabaseCursor) as cursor:
- cursor.execute("SELECT * FROM `tf_idf` LIMIT 100;")
- out = cursor.fetchall()
- print(len(out))
- print(("vocabulary_id", "document_id", "frequency", "tf", "n", "df", "idf"))
- for l in out[:100]:
- print(l)
-
-if __name__ == "__main__":
- with Database() as db:
- # print(db.get_num_documents())
- # print(db.get_document_name_by_id(69420))
- # print(db.get_document_id_by_name("../Datasets/Wikibooks/Russian Lesson 2.html"))
- # print(db.test_log(100))
- # print(db.test_log(21))
- db.get_tf_idf_table()
\ No newline at end of file
+from dataclasses import dataclass
+import math as maths
+import sqlite3
+import tf_idf
+import os
+
+class DatabaseCursor(sqlite3.Cursor):
+ def __init__(self, *args, **kwargs):
+ super().__init__(*args, **kwargs)
+
+ def __enter__(self):
+ return self
+
+ def __exit__(self, type, value, traceback):
+ self.close()
+
+@dataclass
+class Database:
+ db_path:str = os.path.join(".", "wikibooks.db")
+
+ def __enter__(self):
+ if not os.path.exists(self.db_path):
+ self.__connection = sqlite3.connect(self.db_path)
+ self.__build_db()
+ else:
+ self.__connection = sqlite3.connect(self.db_path)
+
+ self.__connection.create_function('log', 1, maths.log10)
+ self.__connection.create_function("log_tf", 1, tf_idf.calc_log_tf)
+ return self
+
+ def __exit__(self, type, value, traceback):
+ self.__connection.commit()
+ self.__connection.close()
+
+ def __build_db(self):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("""
+ CREATE TABLE IF NOT EXISTS `documents` (
+ `document_id` INTEGER PRIMARY KEY,
+ `document_name` TEXT NOT NULL
+ );""")
+ cursor.execute("""
+ CREATE TABLE IF NOT EXISTS `vocabulary` (
+ `vocabulary_id` INTEGER PRIMARY KEY,
+ `term` TEXT NOT NULL
+ );""")
+ cursor.execute("""
+ CREATE TABLE IF NOT EXISTS `term_frequency` (
+ `vocabulary_id` INT UNSIGNED NOT NULL,
+ `document_id` INT UNSIGNED NOT NULL,
+ `frequency` INT UNSIGNED NOT NULL,
+ FOREIGN KEY (`vocabulary_id`) REFERENCES `vocabulary`(`vocabulary_id`),
+ FOREIGN KEY (`document_id`) REFERENCES `documents`(`document_id`),
+ PRIMARY KEY(`vocabulary_id`, `document_id`)
+ );""")
+ cursor.execute("CREATE UNIQUE INDEX unique_terms on vocabulary (term);")
+
+ def append_documents(self, documents):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.executemany("INSERT INTO `documents` (document_name) VALUES (?);", [(doc, ) for doc in documents])
+
+ def get_document_name_by_id(self, id_):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT `document_name` FROM `documents` WHERE `document_id` = ?;", (id_, ))
+ return cursor.fetchone()[0]
+
+ def get_document_id_by_name(self, document_name):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT `document_id` FROM `documents` WHERE `document_name` = ?", (document_name, ))
+ return cursor.fetchone()[0]
+
+ def get_num_documents(self):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT COUNT(*) FROM documents;")
+ return cursor.fetchone()[0]
+
+ def append_terms(self, terms):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.executemany("INSERT OR IGNORE INTO vocabulary(term) VALUES (?);", [(term, ) for term in terms])
+
+ def append_terms_in_document(self, document_id, counter):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.executemany("""
+ INSERT INTO `term_frequency`(`vocabulary_id`, `document_id`, `frequency`)
+ VALUES ((SELECT `vocabulary_id` FROM `vocabulary` WHERE `term` = ?), ?, ?)
+ """, [(i[0], document_id, i[1]) for i in counter.items()])
+
+ def build_tf_idf_table(self):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ # cursor.execute("DROP VIEW IF EXISTS `tf_idf`;")
+ # cursor.execute("DROP VIEW IF EXISTS `vocab_count`;")
+ # i wish i could find a way to do this with a single view but alas i am
+ # not good enough at SQL
+ cursor.execute("""
+ CREATE VIEW IF NOT EXISTS `vocab_count` AS
+ SELECT vocabulary_id,
+ COUNT(vocabulary_id) AS vocabulary_count
+ FROM term_frequency
+ GROUP BY vocabulary_id;
+ """)
+ cursor.execute("""
+ CREATE VIEW IF NOT EXISTS `tf_idf` AS SELECT
+ `term_frequency`.`vocabulary_id` AS `vocabulary_id`,
+ `document_id`,
+ `term_frequency`.`frequency`,
+ LOG_TF(`frequency`) AS tf,
+ (SELECT COUNT(`document_id`) FROM `documents`) AS n,
+ `vocab_count`.`vocabulary_count` AS df,
+ (SELECT LOG(CAST(COUNT(`document_id`) AS REAL) / `vocab_count`.`vocabulary_count`) FROM documents) AS idf,
+ LOG_TF(`frequency`) * (SELECT LOG(CAST(COUNT(`document_id`) AS REAL) / `vocab_count`.`vocabulary_count`) FROM documents) AS tf_idf
+ FROM `term_frequency`
+ INNER JOIN `vocab_count`
+ ON `vocab_count`.`vocabulary_id` = `term_frequency`.`vocabulary_id`
+ ;""")
+
+ def get_term_frequencies(self):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT * FROM `term_frequency`;")
+ return cursor.fetchall()
+
+ def append_tf_idf_table(self, tfs):
+ # print([(i[0], i[1], i[2], i[0], i[0], i[2]) for i in tfs][1])
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.executemany("""
+ INSERT INTO `tf_idf`(`vocabulary_id`, `document_id`, `tf`, `idf`, `tf_idf`)
+ VALUES (
+ ?, ?, ?,
+ (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?),
+ (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?) * ?)
+ """, [(i[0], i[1], i[2], i[0], i[0], i[2]) for i in tfs])
+
+ def append_tf_idf_table_single(self, vocabulary_id, document_id, tf):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("""
+ INSERT INTO `tf_idf`(`vocabulary_id`, `document_id`, `tf`, `idf`, `tf_idf`)
+ VALUES (
+ ?, ?, ?,
+ (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?),
+ (SELECT log((SELECT CAST(COUNT(*) as REAL) FROM documents) / COUNT(*)) FROM term_frequency WHERE vocabulary_id = ?) * ?)
+ """, (vocabulary_id, document_id, tf, vocabulary_id, vocabulary_id, tf))
+
+ def test_log(self, to_log):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT LOG(?);", (to_log, ))
+ return cursor.fetchone()
+
+ def test_tf_log(self, to_tf):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT LOG_TF(?);", (to_tf, ))
+ return cursor.fetchone()
+
+ def get_tf_idf_table(self):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("SELECT * FROM `tf_idf` LIMIT 100;")
+ out = cursor.fetchall()
+ print(len(out))
+ print(("vocabulary_id", "document_id", "frequency", "tf", "n", "df", "idf"))
+ for l in out[:100]:
+ print(l)
+
+ def get_tf_idf_score(self, term, tf_idf_thresh = 0, limit = 1000):
+ with self.__connection.cursor(factory = DatabaseCursor) as cursor:
+ cursor.execute("""
+ SELECT `document_id`, `tf_idf` FROM `tf_idf` WHERE `vocabulary_id` = (
+ SELECT `vocabulary_id` FROM `vocabulary` WHERE `term` = ?
+ ) AND `tf_idf` > ? ORDER BY `tf_idf` DESC LIMIT ?;
+ """, (term, tf_idf_thresh, limit))
+ return {i[0]: i[1] for i in cursor.fetchall()}
+
+if __name__ == "__main__":
+ with Database() as db:
+ # print(db.get_num_documents())
+ # print(db.get_document_name_by_id(69420))
+ # print(db.get_document_id_by_name("../Datasets/Wikibooks/Russian Lesson 2.html"))
+ # print(db.test_log(100))
+ # print(db.test_log(21))
+ # db.get_tf_idf_table()
+ for i, v in db.get_tf_idf_score("enzyme", 1).items():
+ print(i, v)
\ No newline at end of file
--
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