本文主要介绍Python语言开发基础入门—Python基础之字典知识，通过具体的内容向大家展现，希望对大家Python程序开发的学习有所帮助。

搭建Python开发环境

基于Windows系统搭建环境

下载安装包

https://www.python.org/downloads/windows/

安装

基于MacOS系统搭建环境

下载安装包windows

https://www.python.org/downloads/mac-osx/

安装

基于Linux系统搭建环境

下载 https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz

[root@devops ~]# wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz--2019-07-20 08:41:48--  https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgzResolving www.python.org (www.python.org)... 151.101.108.223, 2a04:4e42:36::223Connecting to www.python.org (www.python.org)|151.101.108.223|:443... connected.HTTP request sent, awaiting response... 200 OKLength: 23017663 (22M) [application/octet-stream]Saving to: ‘Python-3.7.4.tgz’ 3% [==>                                                                                     ] 805,859     34.0KB/s  eta 13m 8s

yum -y install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel libffi-devel

tar zxf Python-3.7.4.tgz -C /usr/local
cd /usr/local/Python-3.7.4./configure --enable-shared --prefix=/usr/local/python37
make  && make install

ln -s /usr/local/python37/bin/python3.7 /usr/local/bin/python3

cd /usr/local/python37/lib/ls
libpython3.7m.so  libpython3.7m.so.1.0  libpython3.so  pkgconfig  python3.7cp libpython3.7m.so.1.0  /usr/lib64/1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.

FAQ

Could not build the ssl module!Python requires an OpenSSL 1.0.2 or 1.1 compatible libssl with X509_VERIFY_PARAM_set1_host().LibreSSL 2.6.4 and earlier do not provide the necessary APIs, https://github.com/libressl-portable/portable/issues/381


yum install openssl-devel  -y[root@devops bin]# python3python3: error while loading shared libraries: libpython3.7m.so.1.0: cannot open shared object file: No such file or directory1.2.3.4.5.6.7.8.9.10.

安装Python编辑器-VSCode

向世界问个好-Hello World！

F5 执行

Python变量定义与使用

变量命名

标识符第一个字符必须是字母(大写或小写)或者一个下划线 "_"

标识符名称的其他部分可以有字母(大写或小写)、下划线"_"或数字(0-9)组成

标识符名称是大小写敏感的Myname和myname不是同一个标识符

有效标识符：_myname、name23、alb2_23

无效标识符：2things、this is spaced out、my-name

变量名尽量要求有意义、能够代表某些含义

变量名风格种类：task_detail、taskDetail、TaskDetail

关键字不能声明为变量名

['and', 'as', 'assert', 'break', 'class', 'continue', 'def', 'del', 'elif', 'else', 'except', 'exec', 'finally', 'for', 'from', 'global', 'if', 'import', 'in', 'is', 'lambda', 'not', 'or', 'pass', 'print', 'raise', 'return', 'try', 'while', 'with', 'yield']

实战-打印自己的信息

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print("Hello World!")print("I am zhangsan")name = "zhangsan"sex = "男"age = "40"high = "178"address = "Beijing"print("myname is: " + name)print("sex is : " + sex)print("age is : " + age)print("high is : " + high)print("address is " + address)----->>>Hello World!I am zhangsan
myname is: name
sex is : 男
age is : 40high is : 178address is Beijing

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