Python9-1

for index, item in enumerate(sequence):
    process(index, item)

列表初始化：

multilist = [[0 for col in range(5)] for row in range(3)]

用*初始化，出现的问题：

http://www.jb51.net/article/15716.htm

python内置函数：

int([x[, base]])      #将一个字符转换为int类型，base表示进制
int(‘123‘) int(‘123‘,10)

chr(i)     返回整数i对应的ASCII字符
与之相对应的是ord

一种很棒的先序便利树的方法：

def walk(node):
    """ iterate tree in pre-order depth-first search order """
    yield node
    for child in node.children:
        for n in walk(child):
            yield n

python高级数据结构

http://blog.jobbole.com/65218/

python中__attr，以__开头的属性是private的。外界访问不到。

class A(object):
    def __init__(self):
        self.__age=10
a=A()
print a.__age
Traceback (most recent call last):
  File "H:\final\code\PyTestService\comz\test\Copy of Copy of Test.py", line 12, in <module>
    print a.__age
AttributeError: ‘A‘ object has no attribute ‘__age‘

python数据描述符

http://blog.csdn.net/imzoer/article/details/8788040

python性能建议

http://blog.csdn.net/imzoer/article/details/8851678