python学习

之前每次都是粗略的看看，现在开始决定，好好学习下python这个玩意。

会同步在此处更新学习笔记。

官方网站：

http://www.python.org/    获取最新的代码、文档、新闻

An example: 

kyle@ubuntu:~/workspace$ python
Python 2.7.6 (default, Mar 22 2014, 22:59:56) 
[GCC 4.8.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print "Hello World"
Hello World

标示符：

命令俗成：

• Class names start with anuppercaseletter and all other identifiers with a lowercase letter.

• Starting an identifier with a single leading underscore(_) indicates by convention that the identifier is meant to beprivate.

• Starting an identifier with two leading underscores indicates a strongly private identifier.

• If the identifier also ends with two trailing underscores, the identifier is alanguage-defined special name.

保留关键字：

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

python里没有大括号，靠缩进。

Python has five standard data types:

• Numbers:   int / long / float / complex

• String:　

  str = 'Hello World!'

• List

  list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]

• Tuple：

• Tuples can be thought of as read-only lists.
  

• tuple = ( 'abcd', 786 , 2.23, 'john', 70.2 )

• Dictionary