Psycopg is the most popular PostgreSQL adapter for the Python programming language. Its core is a complete implementation of the Python DB API 2.0 specifications. Several extensions allow access to many of the features offered by PostgreSQL.

Psycopg 3 is a modern implementation of a PostgreSQL adapter for Python. This distribution contains the pure Python package psycopg. Note. Despite the lack of number in the package name, this package is the successor of psycopg2. Please use the psycopg2 package if you are maintaining an existing program using psycopg2 as a dependency.

2010年2月9日 · Psycopg is the most popular PostgreSQL database adapter for the Python programming language. Its main features are the complete implementation of the Python DB API 2.0 specification and the thread safety (several threads can share the same connection).

psycopg2 是一个 Python 模块，用于与 PostgreSQL 数据库一起使用。 我们将 con 变量初始化为 None。 如果无法创建与数据库的连接（例如磁盘已满），则不会定义连接变量。 这将导致 finally 子句中的错误。 connect () 方法创建一个新的数据库会话并返回一个连接对象。 用户创建时没有密码。 在 localhost 上，我们可以省略 password 选项。 否则，必须指定它。 从连接中，我们得到光标对象。 游标用于遍历结果集中的记录。 我们调用游标的 execute () 方法并执行 SQL 语句。 …

2010年2月9日 · Psycopg is the most popular PostgreSQL database adapter for the Python programming language. Its main features are the complete implementation of the Python DB API 2.0 specification and the thread safety (several threads can share the same connection).

Psycopg 3 is a modern implementation of a PostgreSQL adapter for Python. Quick version: For further information about installation please check the documentation. In order to work on the Psycopg source code, you must have the libpq PostgreSQL client library installed on the system. For instance, on Debian systems, you can obtain it by running:

Psycopg 3 is the new implementation of the most used, reliable and feature-rich PostgreSQL adapter for Python. Psycopg 3 design emerges from the experience of more than 10 years of development and support of psycopg2.

Psycopg is the most popular PostgreSQL database adapter for the Python programming language. Its main features are the complete implementation of the Python DB API 2.0 specification and the thread safety (several threads can share the same connection).

2019年4月5日 · Psycopg是Python编程语言中最流行的PostgreSQL数据库适配器。 它的主要功能是完整实现Python DB API 2.0规范和线程安全（多个线程可以共享相同的连接）。 它专为大量多线程应用程序而设计，可以创建和销毁大量游标并创建大量并发“INSERT”或“UPDATE”。

2025年1月7日 · psycopg2 是 psycopg 的旧版本，它是一个非常稳定和广泛使用的PostgreSQL适配器，支持Python 2和Python 3。 API和用法 ： psycopg3 提供了一个更加现代和灵活的API，它的设计更加符合Python的编程习惯，例如使用了异步编程支持和类型注解。