python 基础语法梳理（二）

1、gevent使用

# -*- coding: utf-8 -*-

import gevent
import platform

from gevent import subprocess

def _test_shell(script):
    
    excute_data=[];
    err_data=[];
    
    if platform.system() == "Windows":
        
        popen = subprocess.Popen(script, \
            shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        
        excute_data = popen.stdout.readlines()
        
        err_data = popen.stderr.readlines()
        
        for msg_line in excute_data:
            print "return: %s" %(msg_line.strip())
    
        for err_line in err_data:
            print "err:%s" %(err_line.strip())
         


def talk(msg):  
    print(msg) 

def _test_spwan():
    
    gevent.spawn(talk,"Fredirc")


if __name__ == '__main__':

    _test_shell('java -version')
    
    _test_spwan()
    
    gevent.sleep(0.5)
    
    #上面例子打印输出
    #err:java version "1.6.0_37"
    #err:Java(TM) SE Runtime Environment (build 1.6.0_37-b06)
    #err:Java HotSpot(TM) Client VM (build 20.12-b01, mixed mode, sharing)
    #Fredirc
        
        

2、logging使用

import logging
import os
from logging import FileHandler

def get_logger():
    logger = logging.getLogger('fredric_file')
    log_format = '%(asctime)s %(filename)s %(lineno)d %(levelname)s %(message)s'
    formatter = logging.Formatter(log_format)
    logfile = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'log', 'fredric_log.log')
    handler = FileHandler(logfile, "a")
    handler.setFormatter(formatter)
    logger.addHandler(handler)
    logger.setLevel(logging.ERROR)
    return logger

def get_logger_console():
    logger = logging.getLogger("fredric_console")
    log_format = '%(asctime)s %(filename)s %(lineno)d %(levelname)s %(message)s'
    formatter = logging.Formatter(log_format)
    console = logging.StreamHandler()
    console.setFormatter(formatter)
    logger.addHandler(console)
    logger.setLevel(logging.DEBUG)
    return logger


logger_file = get_logger()
logger_console = get_logger_console()

if __name__ == '__main__':
    
    logger_file.error("fiel error")
    logger_console.error("console error")
    
    logger_file.info("fiel error")
    logger_console.info("console error")
    
    

3、imp使用（类似JAVA反射）

# -*- coding: utf-8 -*-

import imp

if __name__ == '__main__':
    
    #获取这个模块
    module = imp.load_module("Test", *imp.find_module("test", ["./"]))
    
    #实例化这个模块中的类
    temp=module.__getattribute__("Test")();
    
    #执行类包含的方法
    temp.do_staff() #打印：do_staff: Test Class
    
    print temp.__str__() #打印：to_string:Test Class