python官网下载安装免费,python官网下载安装教程

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OpenPGP Public Keys

Source and binary executables are signed by the release manager or binary builder using their

OpenPGP key. Release files for currently supported releases are signed by the following:

Release files for older releases which have now reached end-of-life may have been signed by one of the following:

Anthony Baxter (key id: 0EDD C5F2 6A45 C816)

Georg Brandl (key id: 0A5B 1018 3658 0288)

Martin v. Löwis (key id: 6AF0 53F0 7D9D C8D2)

Ronald Oussoren (key id: C9BE 28DE E6DF 025C)

You can import a person's public keys from a public keyserver network server

you trust by running a command like:

gpg --recv-keys [key id]

or, in many cases, public keys can also be found

at keybase.io.

On the version-specific download pages, you should see a link to both the

downloadable file and a detached signature file. To verify the authenticity

of the download, grab both files and then run this command:

gpg --verify Python-3.6.2.tgz.asc

Note that you must use the name of the signature file, and you should use the

one that's appropriate to the download you're verifying.

(These instructions are geared to

GnuPG and Unix command-line users.)

Other Useful Items

Looking for 3rd party Python modules? The

Package Index has many of them.

You can view the standard documentation

online, or you can download it

in HTML, PostScript, PDF and other formats. See the main

Documentation page.

Information on tools for unpacking archive files

provided on python.org is available.

Tip: even if you download a ready-made binary for your

platform, it makes sense to also download the source.

This lets you browse the standard library (the subdirectory Lib)

and the standard collections of demos (Demo) and tools

(Tools) that come with it. There's a lot you can learn from the

source!

There is also a collection of Emacs packages

that the Emacsing Pythoneer might find useful. This includes major

modes for editing Python, C, C++, Java, etc., Python debugger

interfaces and more. Most packages are compatible with Emacs and

XEmacs.

Want to contribute?

Want to contribute? See the Python Developer's Guide

to learn about how Python development is managed.

### 如何配置支持域名解析的DNS服务器 #### 1. DNS基础概念 DNS(Domain Name System,域名系统)是一个分布式数据库,负责将人类可读的域名转换为计算机使用的IP地址。这种映射关系使得用户可以通过简单的域名访问复杂的网络资源[^4]。 #### 2. Windows环境下的DNS配置方法 在Windows操作系统中,如果遇到无法通过域名访问网站的情况,可能是因为DNS未正确解析目标域名。解决此问题的一种方式是手动编辑`hosts`文件以实现静态域名解析。具体操作如下: - 打开路径 `C:\Windows\System32\drivers\etc` 下的 `hosts` 文件。 - 添加一条记录,例如: ```plaintext 192.168.56.128 www.vwm.com ``` - 使用命令刷新DNS缓存: ```bash ipconfig /flushdns ``` 这种方法适用于小型局域网或临时测试场景,但对于大规模生产环境并不推荐[^1]。 #### 3. Linux环境下DNS配置流程 对于Linux服务器而言,通常需要修改 `/etc/resolv.conf` 文件来指定DNS服务器地址。以下是具体的配置步骤: - 编辑 `/etc/resolv.conf` 文件并添加以下内容: ```plaintext nameserver 8.8.8.8 # Google公共DNS nameserver 114.114.114.114 # 阿里云公共DNS ``` - 如果希望永久生效,则需根据发行版的不同调整相应配置文件,比如Debian/Ubuntu系列中的 `/etc/network/interfaces` 或者 `/etc/systemd/resolved.conf`[^2]。 #### 4. 自建DNS服务器方案 为了完全掌控内部网络中的域名解析行为,可以考虑自建DNS服务器。常见的开源软件有BIND、PowerDNS等。下面以BIND为例说明其基本安装与配置过程: ##### 安装BIND服务 在基于RedHat/CentOS系统的服务器上运行以下命令安装BIND: ```bash yum install bind bind-utils -y ``` 在基于Debian/Ubuntu系统的服务器上运行以下命令安装BIND: ```bash apt update && apt install bind9 dnsutils -y ``` ##### 修改主配置文件 默认情况下,BIND的主要配置位于 `/etc/named.conf` (CentOS/RHEL)或者 `/etc/bind/named.conf.local` (Debian/Ubuntu)。在此处定义区域数据及其存储位置。例如新增一个正向查找区: ```plaintext zone "example.com" IN { type master; file "/var/named/example.com.zone"; }; ``` ##### 创建区域文件 创建上述提到的 `.zone` 文件,并填充必要的SOA记录、NS记录以及其他类型的条目。样例内容如下所示: ```plaintext $TTL 86400 @ IN SOA ns1.example.com. admin.example.com. ( 2023101001 ; Serial number 3600 ; Refresh period 1800 ; Retry interval 604800 ; Expire time 86400 ) ; Minimum TTL NS ns1.example.com. ns1 A 192.168.1.10 www A 192.168.1.20 mail CNAME www.example.com. ``` 最后重启服务使更改生效: ```bash systemctl restart named ``` 以上即完成了初步的DNS服务器搭建工作[^4]。 --- ###
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