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Python から PostgreSQL へ接続

Last updated at Posted at 2018-07-10

install

pip install psycopg2
pip install psycopg2-binary

Running the test suite

python -c "from psycopg2 import tests; tests.unittest.main(defaultTest='tests.test_suite')" --verbose

下記の通りテスト用のDBをあらかじめ準備してあげることによって、実行できるようでした。
createdb -E utf8 psycopg2_test

Basic module usage

あらかじめテスト用DBを作成し

createdb -E utf8 test
python

Pythonのインタラクティブ・モードを起動します。


import psycopg2
conn = psycopg2.connect("dbname=test user=postgres")
cur = conn.cursor()
cur.execute("CREATE TABLE test (id serial PRIMARY KEY, num integer, data varchar);")
cur.execute("INSERT INTO test (num, data) VALUES (%s, %s)",(100, "abc'def"))
cur.execute("SELECT * FROM test;")
cur.fetchone()
conn.commit()
cur.close()
conn.close()

テーブル作成(CREATE)、
データ作成(INSERT)、
データの参照(SELECT)、
まで確認することができました。

参考

Psycopg – PostgreSQL database adapter for Python

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