笨方法学习Python（1-10）
以下学习内容以python2为基准UTF-8
#conding:utf-8 or #__coding:utf-8__ 此句要置顶，表示代码支持UTF8的格式，最好每个代码文件都加上
注释
# A comment, this is so you can read your program later. 代码前加“#”表示的是注释，以后写每行代码的上一行记得都加上解释信息
python2与python3
print“abc” #python2的写法
print ("abc") #python3的写法
3、数字和数学计算
+ plus 加号
- minus 减号
/ slash 斜杠
* asterisk 星号
% percent 百分号
< less-than 小于号
> greater-than 大于号
<= less-than-equal 小于等于号
>= greater-than-equal 大于等于号
4、变量和命名
>>> cars = 100
>>> print "There are", cars, "cars available."
结果： There are 100 cars available.
5、更多的变量和打印
>>> my_name = 'Kavin'
>>> print "Let's talk about %s." % my_name
结果
>>>Let's talk about Kavin. python中的%r和%s
%r用rper()方法处理对象
%s用str()方法处理对象
有些情况下，两者处理的结果是一样的，比如说处理int型对象
%r会在字符串两侧多出‘ ’
6、字符串（srring）和文本
w = "This is the left side of..."
e = "a string with a right side."
print w + e
This is the left side of...a string with a right side.
print "." * 10
..........
7、更多打印
days = "Mon Tue Wed Thu Fri Sat Sun"
months = "Jan\nFeb\nMar\nApr\nMay\nJun\nJul\nAug"
print "Here are the days: ", days
print "Here are the months: ", months
print """
There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6.
"""
$ python ex9.py
Here are the days: Mon Tue Wed Thu Fri Sat Sun
Here are the months: Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
There's something going on here.
With the three double-quotes.
We'll be able to type as much as we like.
Even 4 lines if we want, or 5, or 6.
\n 强制换行
print""" """ 按照既定的格式显示
'''''' 也可使用单引号
print "",abc 加逗号,逗号后面的不换行
10、那是什么
\ 转义符，可将难打印出来的字符放到字符串
\t \r \n都是转义字符，空格就是单纯的空格，输入时可以输入空格
\t 的意思是 横向跳到下一制表符位置
\r 的意思是 回车
\n 的意思是回车换行
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