An ultra simple wrapper for Python psycopg2 with very basic functionality
- Scott Clark, September 2015
- MIT License
From the source
python setup.py install
#Usage
from psycho import Psycho
db = Psycho(
host="127.0.0.1",
database="mydatabase",
user="username",
password="password",
keep_alive=True # try and reconnect timed out postgresql connections?
)
# insert a record to the <em>books</em> table
db.insert("books", {"type": "paperback", "name": "Time Machine", "price": 5.55, year: "1997"})
book = db.getOne("books", ["name"], ["year = 1997"])
print "The book's name is " + book.name#Query methods insert(), update(), delete(), getOne(), getAll(), query()
##insert(table, record{}) Inserts a single record into a table.
db.insert("food", {"type": "fruit", "name": "Apple", "color": "red"})
db.insert("books", {"type": "paperback", "name": "Time Machine", "price": 5.55})##update(table, row{}, condition[]) Update one more or rows based on a condition (or no condition).
# update all rows
db.update("books", {"discount": 0})
# update rows based on a simple hardcoded condition
db.update("books",
{"discount": 10},
["id=1"]
)
# update rows based on a parametrized condition
db.update("books",
{"discount": 10},
("id=%s AND year=%s", [id, year])
)##insertOrUpdate(table, row{}, key) Insert a new row, or update if there is a primary key conflict.
# insert a book with id 123. if it already exists, update values
db.insert("books",
{"id": 123, type": "paperback", "name": "Time Machine", "price": 5.55},
"id"
)##getOne(table, fields[], condition[], order[], limit[]) ##getAll(table, fields[], condition[], order[], limit[]) Get a single record or multiple records from a table given a condition (or no condition). The resultant rows are returned as namedtuples. getOne() returns a single namedtuple, and getAll() returns a list of namedtuples.
book = db.getOne("books", ["id", "name"])# get a row based on a simple hardcoded condition
book = db.getOne("books", ["name", "year"], ("id=1"))# get a row based on a simple hardcoded condition
book = db.getOne("books", ["name", "year"], ("id=1"))# get multiple rows based on a parametrized condition
books = db.getAll("books",
["id", "name"],
("year > %s and price < 15", [year, 12.99])
)# get multiple rows based on a parametrized condition with an order and limit specified
books = db.getAll("books",
["id", "name", "year"],
("year > %s and price < 15", [year, 12.99]),
["year", "DESC"], # ORDER BY year DESC
[0, 10] # LIMIT 0, 10
)Delete one or more records based on a condition (or no condition)
# delete all rows
db.delete("books")
# delete rows based on a condition
db.delete("books", ("price > %s AND year < %s", [25, 1999]))##query(table) Run a raw SQL query. The psycopg2 cursor is returned.
db.query("DELETE FROM books WHERE year > 2005")Insert, update, and delete operations on transactional databases such as innoDB need to be committed