python_模块 - 爱码网

time

 1 time_obj = time.localtime()
 2 print("%s-%s-%s %s:%s" % (time_obj.tm_year,time_obj.tm_mon,time_obj.tm_mday,time_obj.tm_hour,time_obj.tm_min))
 3 
 4 print(time.strftime("%Y-%m-%d %H:%M:%S",time.localtime()))
 5 
 6 print(time.strptime("2016-01-28 15:40:12","%Y-%m-%d %H:%M:%S"))
 7 
 8 print(datetime.date.today())
 9 
10 current_time = datetime.datetime.now()
11 print(current_time)
12 print(current_time.timetuple())
13 
14 new_date = datetime.datetime.now() + datetime.timedelta(days=10) #比现在加10天
15 new_date = datetime.datetime.now() + datetime.timedelta(days=-10) #比现在减10天
16 new_date = datetime.datetime.now() + datetime.timedelta(hours=-10)#比现在减10小时
17 new_date = datetime.datetime.now() + datetime.timedelta(seconds=120)#比现在增加120s
18 new_date = datetime.datetime.now() + datetime.timedelta(weeks=1) #比现在加一周

sys

sys.argv           命令行参数List，第一个元素是程序本身路径
sys.exit(n)        退出程序，正常退出时exit(0)
sys.version        获取Python解释程序的版本信息
sys.maxint         最大的Int值
sys.path           返回模块的搜索路径，初始化时使用PYTHONPATH环境变量的值
sys.platform       返回操作系统平台名称
sys.stdin          输入相关
sys.stdout         输出相关
sys.stderror       错误相关

1、sys.argv使用方法：
import sys,os

os.mkdir(sys.argv[1])
python test4.py heelo #创建目录

2、如果sys.path路径列表没有你想要的路径，可以通过 sys.path.append('路径') 添加：
import sys
import os
project_path = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(project_path

 1 import sys
 2 import time
 3 
 4 
 5 def view_bar(num, total):
 6     rate = float(num) / float(total)
 7     rate_num = int(rate * 100)
 8     r = '\r%d%% |%s' % (rate_num, rate_num * "*")
 9     sys.stdout.write(r)
10     sys.stdout.flush()
11 
12 
13 if __name__ == '__main__':
14     for i in range(0, 101):
15         time.sleep(0.1)
16         view_bar(i, 100)

进度百分比

import sys
import time


def view_bar(num, total):
    rate = float(num) / float(total)
    rate_num = int(rate * 100)
    r = '\r%d%%' % (rate_num, )
    sys.stdout.write(r)
    sys.stdout.flush()


if __name__ == '__main__':
    for i in range(0, 100):
        time.sleep(0.1)
        view_bar(i, 100)