刚接触python,mark下所见所得：
1.Python调用底层API，可在任何platform上运行，包括Windows、Mac、Unix；
2.用#符号对代码或语句进行注释，#后的代码不被编译；
3.print的时候使用逗号[,]告诉解释器不作新行输出；
4.python程序可以运行在windows shell里(cmd line)；
5.代码可以在notepad下编辑，纯文本结构文件；
6.变量声明：v=2; v="can be changed to a string"; #the value of v can be changed at any time;
name="paul cheng";同样用加号进行字符串连接；
7.while循环：[代码逻辑结构完全用缩进控制，新鲜清洁]
n=1
while n<10:
print n
n=n+1
8.function:
1)definition:
def hello():
print "hello"
return 1234
2)invoke:
"print hello()" will output result like: [after execution of print "hello", function returns 1234 for printing]
hello
1234
9.Tuples, Lists, Dictionaries.
1)Tuples: month = ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun')
2)Lists: cats = ['Tom', 'Snappy', 'Kitty', 'Jessie', 'Chester']
add: cats.append("appendOne")
delete: cats.remove("Tom") or del cats[n];
get one: cats[1] will get "Snappy";
get many: cats[0:2] will get "'Tom','Snappy','Kitty'";
3)Dictinonaries: phonebook = {'paul cheung':123456, 'chirs paul':654321}
add: phonebook['key']=value
delete: del phonebook['key']
keys: phonebook.keys() will return all keys as a list;
values: phonebook.values() will return all values as a list;
10.loop-for:
for item in list:
print item
11.class:
class person: #definition
def _init_(selef, name, age): #.ctor
self.name=name
self.age=age
class student(person): #inheritence
{statement...}
12.module: #include variables/function/class;
13.import module:
import module_name
from module_name import function_name/class_name
14.use imported module:
module_name.function_name/class;
function_name if use from...import...
15.file I/O：
file = open('file_name', 'r/w')
file.seek(int, int) #moving cursor
16.error handling:
try:
{statement...}
except NameError:
{...} #handle a type of error
except SyntaxError:
{...} #handle another type of error
or except (NameError, SyntaxError)
{...} #handle multilple types of error together