Hello world!

安装Python

$sudo apt-get install python
$sudo apt-get install python3

查看python版本

$python --version
Python 2.7.6

$python3 --version
Python 3.4.0

Python2 Setup and Usage

Python3 Setup and Usage

hello world

• 创建源文件 vi hello.py

  print("hello world!");
  

• 运行

  $python hello.py
  

  运行结果

  hello world!
  

  本地文档帮助

  ``` $pydoc3.4 print

Help on built-in function print in module builtins:

print(...) print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)

Prints the values to a stream, or to sys.stdout by default.
Optional keyword arguments:
file:  a file-like object (stream); defaults to the current sys.stdout.
sep:   string inserted between values, default a space.
end:   string appended after the last value, default a newline.
flush: whether to forcibly flush the stream.

#在线文档
[python2 tutorial](http://docs.python.org/2.7/tutorial/)

[python3 tutorial](http://docs.python.org/3.4/tutorial/)

[python2 reference](https://docs.python.org/2/reference/index.html)

[python3 reference](https://docs.python.org/3/reference/index.html)

[python2 标准库在线文档](https://docs.python.org/2/library/index.html)

[python3 标准库在线文档](https://docs.python.org/3/library/index.html)


#将本地库hello.py提交至github
第一次提交要使用

$git push origin master

若直接使用

$git push

会出现

No refs in common and none specified; doing nothing. Perhaps you should specify a branch such as 'master'. Everything up-to-date ``` 因为本地不知道往远程哪里提交。