python sys，os，time模块的使用（包括时间格式的各种转换）

self = sys.argv[0]
name = sys.argv[1]
age = sys.argv[2]
print self, name, age

print sys.getdefaultencoding()

reload(sys)
sys.setdefaultencoding('utf8')

sys.path

print sys.platform

for i in range(1, 10):
print '第%s次:' % i, i
if i == 5:
print '第五次退出'
sys.exit(0)

print os.name()

print os.getcwd()

print os.listdir('.')

os.remove('aaa.txt')

os.rmdir('C://Users/xiaoxinsoso/Desktop/aaa')

os.makedirs('aaa/aaa')

print os.path.isfile('ccc.txt')
print os.path.isfile('aaa')

print os.path.isdir('aaa')
print os.path.isdir('ccc.txt')

print os.path.exists('bbb')
print os.path.exists('aaa')
print os.path.exists('ccc.txt')

print os.path.split('C://Users/xiaoxinsoso/Desktop/aaa/ccc.txt')

print os.getcwd()

var = 123
os.environ['var'] = str(var) # 注意此处[]内得是 “字符串”
os.system('echo $var')

os.system('dir')

print os.path.getsize('ccc.txt')

print os.path.abspath('.')

print os.path.join('c://user/xiaoxinsoso/', 'wenjian.txt')

print os.path.basename('ccc.txt')

print os.path.dirname('C://Users/xiaoxinsoso/Desktop/aaa/ccc.txt')

if __name__ == "__main__":
print os.path.realpath(sys.argv[0])
print os.path.split(os.path.realpath(sys.argv[0]))
print os.path.split(os.path.realpath(sys.argv[0]))[0]

ticks = time.time()
print "当前时间戳为:", ticks

localtime = time.localtime(time.time())
print "本地时间为 :", localtime

localtime = time.asctime(time.localtime(time.time()))
print "本地时间为 :", localtime

print time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())

print time.strftime("%a %b %d %H:%M:%S %Y", time.localtime())

a = "Sat Mar 28 22:24:24 2016"
print time.mktime(time.strptime(a, "%a %b %d %H:%M:%S %Y"))

cal = calendar.month(2017, 1)
print "以下输出2016年1月份的日历:"
print cal

now = datetime.datetime.now()
print now
now = date time.datetime.now()
yes_time = now + date time.timedelta(days=-1) # 前一天的时间

strdatetime = now.strftime("%Y-%m-%d %H:%M:%S") # 以字符串形式显示时间，显示全部
strdatetime1= now.strftime("%Y-%m-%d") # 以字符串形式显示时间，只显示日期
print strdatetime
print strdatetime1

datetime1 = datetime.datetime.strptime(strdatetime1, "%Y-%m-%d")
print datetime1

time_time = time.mktime(datetime1.timetuple())
print time_time

time1 = time.strftime('%Y-%m-%d',time.localtime(time_time))
print time1

date1 = datetime.date(2012, 11, 19)
date = datetime.date.today()
print date
print datetime.datetime.strptime(str(date),'%Y-%m-%d') #将date转换为str，在由str转换为datetime
print datetime.datetime.strptime(str(date1),'%Y-%m-%d') #将date转换为str，在由str转换为datetime