Python
简介
Python 解释性、编译性、互动性和面向对象的脚本语言。
- Python 是一种解释型语言。
- Python 是交互式语言。
- Python 是面向对象语言。
Python 发展历史
Python 是由 Guido van Rossum 在八十年代末和九十年代初，在荷兰国家数学和计算机科学研究所设计出来的。
大版本2，3。
中版本
小版本
Python 特点
- 1.易于学习
- 2.易于阅读
- 3.广泛的标准库
- 4.GUI编程
- 5.免费、开源
- 6.可移植性
- 7.面向对象
应用场景
- Web应用开发
- 人工智能
- 游戏
- 自动化脚本
安装
pycharm+python3.7.4
python3.7.4 exe安装
The Zen of Python
The Zen of Python, by Tim Peters
Beautiful is better than ugly.
Explicit is better than implicit.
Simple is better than complex.
Complex is better than complicated.
Flat is better than nested.
Sparse is better than dense.
Readability counts.
Special cases aren’t special enough to break the rules.
Although practicality beats purity.
Errors should never pass silently.
Unless explicitly silenced.
In the face of ambiguity, refuse the temptation to guess.
There should be one-- and preferably only one --obvious way to do it.
Although that way may not be obvious at first unless you’re Dutch.
Now is better than never.
Although never is often better than right now.
If the implementation is hard to explain, it’s a bad idea.
If the implementation is easy to explain, it may be a good idea.
Namespaces are one honking great idea – let’s do more of those!
md语法练习 ===== ------ ## * * ** ** *** ***