mirror of
https://github.com/psycopg/psycopg2.git
synced 2024-11-24 18:03:43 +03:00
599432552a
ag -l Copyright | xargs sed -i \
"s/\(.*copyright (C) [0-9]\+\)\(-[0-9]\+\)\?\(.*\)/\1-$(date +%Y)\3/I"
131 lines
4.8 KiB
Python
131 lines
4.8 KiB
Python
"""A Python driver for PostgreSQL
|
|
|
|
psycopg is a PostgreSQL_ database adapter for the Python_ programming
|
|
language. This is version 2, a complete rewrite of the original code to
|
|
provide new-style classes for connection and cursor objects and other sweet
|
|
candies. Like the original, psycopg 2 was written with the aim of being very
|
|
small and fast, and stable as a rock.
|
|
|
|
Homepage: http://initd.org/projects/psycopg2
|
|
|
|
.. _PostgreSQL: https://www.postgresql.org/
|
|
.. _Python: https://www.python.org/
|
|
|
|
:Groups:
|
|
* `Connections creation`: connect
|
|
* `Value objects constructors`: Binary, Date, DateFromTicks, Time,
|
|
TimeFromTicks, Timestamp, TimestampFromTicks
|
|
"""
|
|
# psycopg/__init__.py - initialization of the psycopg module
|
|
#
|
|
# Copyright (C) 2003-2019 Federico Di Gregorio <fog@debian.org>
|
|
#
|
|
# psycopg2 is free software: you can redistribute it and/or modify it
|
|
# under the terms of the GNU Lesser General Public License as published
|
|
# by the Free Software Foundation, either version 3 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# In addition, as a special exception, the copyright holders give
|
|
# permission to link this program with the OpenSSL library (or with
|
|
# modified versions of OpenSSL that use the same license as OpenSSL),
|
|
# and distribute linked combinations including the two.
|
|
#
|
|
# You must obey the GNU Lesser General Public License in all respects for
|
|
# all of the code used other than OpenSSL.
|
|
#
|
|
# psycopg2 is distributed in the hope that it will be useful, but WITHOUT
|
|
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
# License for more details.
|
|
|
|
# Import modules needed by _psycopg to allow tools like py2exe to do
|
|
# their work without bothering about the module dependencies.
|
|
|
|
# Note: the first internal import should be _psycopg, otherwise the real cause
|
|
# of a failed loading of the C module may get hidden, see
|
|
# https://archives.postgresql.org/psycopg/2011-02/msg00044.php
|
|
|
|
# Import the DBAPI-2.0 stuff into top-level module.
|
|
|
|
from psycopg2._psycopg import ( # noqa
|
|
BINARY, NUMBER, STRING, DATETIME, ROWID,
|
|
|
|
Binary, Date, Time, Timestamp,
|
|
DateFromTicks, TimeFromTicks, TimestampFromTicks,
|
|
|
|
Error, Warning, DataError, DatabaseError, ProgrammingError, IntegrityError,
|
|
InterfaceError, InternalError, NotSupportedError, OperationalError,
|
|
|
|
_connect, apilevel, threadsafety, paramstyle,
|
|
__version__, __libpq_version__,
|
|
)
|
|
|
|
from psycopg2 import tz # noqa
|
|
|
|
|
|
# Register default adapters.
|
|
|
|
from psycopg2 import extensions as _ext
|
|
_ext.register_adapter(tuple, _ext.SQL_IN)
|
|
_ext.register_adapter(type(None), _ext.NoneAdapter)
|
|
|
|
# Register the Decimal adapter here instead of in the C layer.
|
|
# This way a new class is registered for each sub-interpreter.
|
|
# See ticket #52
|
|
from decimal import Decimal # noqa
|
|
from psycopg2._psycopg import Decimal as Adapter # noqa
|
|
_ext.register_adapter(Decimal, Adapter)
|
|
del Decimal, Adapter
|
|
|
|
|
|
def connect(dsn=None, connection_factory=None, cursor_factory=None, **kwargs):
|
|
"""
|
|
Create a new database connection.
|
|
|
|
The connection parameters can be specified as a string:
|
|
|
|
conn = psycopg2.connect("dbname=test user=postgres password=secret")
|
|
|
|
or using a set of keyword arguments:
|
|
|
|
conn = psycopg2.connect(database="test", user="postgres", password="secret")
|
|
|
|
Or as a mix of both. The basic connection parameters are:
|
|
|
|
- *dbname*: the database name
|
|
- *database*: the database name (only as keyword argument)
|
|
- *user*: user name used to authenticate
|
|
- *password*: password used to authenticate
|
|
- *host*: database host address (defaults to UNIX socket if not provided)
|
|
- *port*: connection port number (defaults to 5432 if not provided)
|
|
|
|
Using the *connection_factory* parameter a different class or connections
|
|
factory can be specified. It should be a callable object taking a dsn
|
|
argument.
|
|
|
|
Using the *cursor_factory* parameter, a new default cursor factory will be
|
|
used by cursor().
|
|
|
|
Using *async*=True an asynchronous connection will be created. *async_* is
|
|
a valid alias (for Python versions where ``async`` is a keyword).
|
|
|
|
Any other keyword parameter will be passed to the underlying client
|
|
library: the list of supported parameters depends on the library version.
|
|
|
|
"""
|
|
kwasync = {}
|
|
if 'async' in kwargs:
|
|
kwasync['async'] = kwargs.pop('async')
|
|
if 'async_' in kwargs:
|
|
kwasync['async_'] = kwargs.pop('async_')
|
|
|
|
if dsn is None and not kwargs:
|
|
raise TypeError('missing dsn and no parameters')
|
|
|
|
dsn = _ext.make_dsn(dsn, **kwargs)
|
|
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
|
|
if cursor_factory is not None:
|
|
conn.cursor_factory = cursor_factory
|
|
|
|
return conn
|