import time
import datetime
t = time.time()
print (t)            #原始时间数据
print (int(t))         #秒级时间戳
print (int(round(t * 1000)))  #毫秒级时间戳
print (int(round(t * 1000000))) #微秒级时间戳

1499825149.257892  #原始时间数据
1499825149      #秒级时间戳，10位
1499825149257    #毫秒级时间戳，13位
1499825149257892   #微秒级时间戳，16位

dt  = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S')
dt_ms = datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f') # 含微秒的日期时间，来源 比特量化
print(dt)
print(dt_ms)

2018-09-06 21:54:46
2018-09-06 21:54:46.205213

dt = '2018-01-01 10:40:30'
ts = int(time.mktime(time.strptime(dt, "%Y-%m-%d %H:%M:%S")))
print (ts)

1514774430

ts = 1515774430
dt = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(ts))
print(dt)

2018-01-13 00:27:10

dt = '08/02/2019 01:00'
dt_new = datetime.datetime.strptime(dt, '%m/%d/%Y %H:%M').strftime('%Y-%m-%d %H:%M:%S')
print(dt_new)

2019-08-02 01:00:00

ta_dt = time.strptime("2018-09-06 21:54:46", '%Y-%m-%d %H:%M:%S') #日期时间转结构体 
ta_ms = time.localtime(1486188476) #时间戳转结构体，注意时间戳要求为int，来源 比特量化
print(ta_dt)
print(ta_ms)

time.struct_time(tm_year=2018, tm_mon=9, tm_mday=6, tm_hour=21, tm_min=54, tm_sec=46, tm_wday=3, tm_yday=249, tm_isdst=-1)
time.struct_time(tm_year=2017, tm_mon=2, tm_mday=4, tm_hour=14, tm_min=7, tm_sec=56, tm_wday=5, tm_yday=35, tm_isdst=0)