معرفی شرکت ها
dw-python-monetdb-async-12.0.2
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشتر
تبلیغات ما
مشتریان به طور فزاینده ای آنلاین هستند. تبلیغات می تواند به آنها کمک کند تا کسب و کار شما را پیدا کنند.
مشاهده بیشترتوضیحات
Native MonetDB client Python API
| ویژگی | مقدار |
|---|---|
| سیستم عامل | - |
| نام فایل | dw-python-monetdb-async-12.0.2 |
| نام | dw-python-monetdb-async |
| نسخه کتابخانه | 12.0.2 |
| نگهدارنده | [] |
| ایمیل نگهدارنده | [] |
| نویسنده | MonetDB BV |
| ایمیل نویسنده | info@monetdb.org |
| آدرس صفحه اصلی | http://www.monetdb.org/ |
| آدرس اینترنتی | https://pypi.org/project/dw-python-monetdb-async/ |
| مجوز | - |
.. The contents of this file are subject to the MonetDB Public License
.. Version 1.1 (the "License"); you may not use this file except in
.. compliance with the License. You may obtain a copy of the License at
.. http://www.monetdb.org/Legal/MonetDBLicense
..
.. Software distributed under the License is distributed on an "AS IS"
.. basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
.. License for the specific language governing rights and limitations
.. under the License.
..
.. The Original Code is the MonetDB Database System.
..
.. The Initial Developer of the Original Code is CWI.
.. Portions created by CWI are Copyright (C) 1997-July 2008 CWI.
.. Copyright August 2008-2015 MonetDB B.V.
.. All Rights Reserved.
.. This document is written in reStructuredText (see
http://docutils.sourceforge.net/ for more information).
Use ``rst2html.py`` to convert this file to HTML.
=======================================================================
The MonetDB MAPI and SQL client Python API, with Async and COPY support
=======================================================================
This version of the Python 3 MonetDB client includes some additional features to support bulk copy operations
Introduction
============
This is the new native Python client API. This API is cross-platform,
and doesn't depend on any monetdb libraries. It has support for
Python 3.2+ and is Python DBAPI 2.0 compatible.
This is a fork of the code distributed with MonetDB that adds support
for asynchronous operation (requires greenlet_) and bulk I/O
with ``COPY``.
.. _greenlet: https://greenlet.readthedocs.org/en/latest/
Installation
============
To install the MonetDB Python API run the following command from the
python source directory::
# python setup.py install
That's all, now you are ready to start using the API.
Documentation
=============
The Python code is well documented, so if you need to find
documentation you should have a look at the source code. Below is an
interactive example on how to use the MonetDB SQL API which should get
you started quite fast.
Examples
========
There are some examples in the 'examples' folder, but here are is a
line by line example of the SQL API::
> # import the SQL module
> import monetdb.sql
>
> # set up a connection. arguments below are the defaults
> connection = monetdb.sql.connect(username="monetdb", password="monetdb", hostname="localhost", database="demo")
>
> # create a cursor
> cursor = connection.cursor()
>
> # increase the rows fetched to increase performance (optional)
> cursor.arraysize = 100
>
> # execute a query (return the number of rows to fetch)
> cursor.execute('SELECT * FROM tables')
26
>
> # fetch only one row
> cursor.fetchone()
[1062, 'schemas', 1061, None, 0, True, 0, 0]
>
> # fetch the remaining rows
> cursor.fetchall()
[[1067, 'types', 1061, None, 0, True, 0, 0],
[1076, 'functions', 1061, None, 0, True, 0, 0],
[1085, 'args', 1061, None, 0, True, 0, 0],
[1093, 'sequences', 1061, None, 0, True, 0, 0],
[1103, 'dependencies', 1061, None, 0, True, 0, 0],
[1107, 'connections', 1061, None, 0, True, 0, 0],
[1116, '_tables', 1061, None, 0, True, 0, 0],
...
[4141, 'user_role', 1061, None, 0, True, 0, 0],
[4144, 'auths', 1061, None, 0, True, 0, 0],
[4148, 'privileges', 1061, None, 0, True, 0, 0]]
>
> # Show the table meta data
> cursor.description
[('id', 'int', 4, 4, None, None, None),
('name', 'varchar', 12, 12, None, None, None),
('schema_id', 'int', 4, 4, None, None, None),
('query', 'varchar', 168, 168, None, None, None),
('type', 'smallint', 1, 1, None, None, None),
('system', 'boolean', 5, 5, None, None, None),
('commit_action', 'smallint', 1, 1, None, None, None),
('temporary', 'tinyint', 1, 1, None, None, None)]
If you would like to communicate with the database at a lower level
you can use the MAPI library::
> from monetdb import mapi
> server = mapi.Server()
> server.connect(hostname="localhost", port=50000, username="monetdb", password="monetdb", database="demo", language="sql")
> server.cmd("sSELECT * FROM tables;")
...
Copying a table from PostgreSQL (using the Psycopg2 driver) to MonetDB::
data = io.StringIO()
pg_cursor = pg_conn.cursor()
pg_cursor.copy_expert(
"""COPY {} TO STDOUT WITH CSV QUOTE '"' ESCAPE '\\' NULL ''""".format(pg_table), data)
data.seek(0)
monetdb_cursor = monetdb_conn.cursor()
monetdb_cursor.copy_from(data, monetdb_table, string_quote='"', null_string='')
monetdb_conn.commit()
نیازمندی
| مقدار | نام |
|---|---|
| ==0.4.14 | greenlet |
نحوه نصب
نصب پکیج whl dw-python-monetdb-async-12.0.2:
pip install dw-python-monetdb-async-12.0.2.whl
نصب پکیج tar.gz dw-python-monetdb-async-12.0.2:
pip install dw-python-monetdb-async-12.0.2.tar.gz