os模块2
利用time.time()方法，我们可以计算两个时间点之间的时间间隔，但是有些时候我们想要得到/etc/group
文件的最后m/a/c/time的时间，对应的年月日这些信息并保存再文件date.txt文件中
import os
import time
time1 = os.path.getctime('/etc/group')
print(time1)
tuple_time = time.localtime(time1)
print(tuple_time)
year = tuple_time.tm_year
month = tuple_time.tm_mon
day = tuple_time.tm_mday
print(year, month, day)
print(type(year))
print(type(month))
print(type(day))
with open('data.txt', 'a') as f:
f.write('%d %d %d' % (year, month, day))
f.write('\n')
