python基础操作搜集

1. 面向对象格式

class onesection:  
      name   = '123'  
      key    = None 
      value  = None
      def fail_in_the_blank():  
          logger.info('123')  

t1 = onesection()
t1.name  = '234'

2. dictionary

d.clear()      #清空  
d.keys()       #返回list
d.values()     #返回list
d.items()      #返回list

3. 二维数组

nums_battery_weight  =  [[None] * 3] * 3      #申请三组内存空间一样的，一组三个None的数组
nums_battery_weight  =  [[] * 3] * 3          #申请三组内存空间一样的，一组三个None的数组  
nums_battery_weight  =  [[None] * 3  , [None] * 3 , [None] * 3]       #申请三组内存空间不同的，一组三个None的数组

4. 日志模块

import logging  
logger.basicConfig(level=logging.INFO)
logger = logger.getLogger(__name__)  

logger.info('print logger')  
logger.debug('not show')

5.字符串处理

str.lstrip()      #去除左边
str.rstrip()      #去除右边
str.strip()       #去除两边  

#string与list互转  
str_list = [
          str1,
          str2,
          str3  
          ]
str_all = ''.join(str_list)  

str = 'abcde'  
list_str = list(str)  
list  
['a','b','c','d','e']

6. 字符串转数字

str_int     = '123'
str_float   = '1.23'
num_int     = int(str_int)  
num_float   = float(str_float)