python简介

                 

                            2.1出生:

                                     吉多 范罗苏姆

                           

                            2.2应用:

                                     爬虫

                                     web

                                     人工智能

                                     自动化运维

                                     云计算

                                     金融

                                     (挣钱)

                                     游戏

                            2.3应用公司:

                                     谷歌

                                     cia

                                     nasa

                                     豆瓣

                                     知乎

                                     yutube

                                     tab

                                     。。。。       

                            2.4优点:

                                     简洁,简单易学

                                     跨平台

                                     开发效率高   第三方库 (类库)

                                     高级语言

                                     嵌入  

                                     可扩展

                            2.5python与其他语言

                                     c,c#,php , java python

                                     第一种(执行速度):

                                              - c  (机器码)  计算机能够识别的语言

                                              - c#,php ,java python(字节码)

                                                字节码  机器码

                                     第二种 (解释性,编译型)

                                              - c 编译型

                                              - c#,php ,java python(字节码)

                                              # python解释型语言

                                     第三种(易学)

                                              - python

                                              - 其他语言

                                     1.为什么不学c?

                                              学习成本高,学习难度大

                                     2.为什么不学c#,java

                                              学习难度大

                                     3.为什么不学php?

                                              web

                                              单一

                                              因为django出来的晚

                            3.python种类:

                                     cpython  ironpython  jython  pypy      

                            4. python发展史

                                     2004 django

                                     2008 2.7

                                              2.7 重复代码              语言不统一

                                              3.x 没有重复代码    语言统一

posted on 2018-10-22 21:37  汩汩-咕咚  阅读(115)  评论(0编辑  收藏  举报