python中时间与时间戳转换

import time
import datetime

#时间转换为时间戳
def date_to_timestamp(date_string):
    return time.mktime(datetime.datetime.strptime(date_string, '%Y-%m-%d').timetuple())

#时间戳转换为时间

def timestamp_to_date(timestamp): 

　　if timestamp is None:
 　　　return None 

return datetime.datetime.fromtimestamp(timestamp).strftime('%Y-%m-%d %H:%M:%S') 


if __name__ == '__main__': 

　　a=date_to_timestamp('2018-06-22')
　　print(a)
　　b=timestamp_to_date(1529596800.0)
　　print(b)

打印日志：

C:\Python34\python.exe "E:/consult project/automation_seat/automation/test/count.py"
1529596800.0
2018-06-22 00:00:00

Process finished with exit code 0