ProgrammerSought

import time
 #timestamp #returns a timestamp representing the number of seconds since 1970.1.1 print ( time.time ())   
# 1553959680.65606


#String time # The letter representation is fixed 
, but the format is not fixed, just change it 
print (time.strftime( " %Y-%m-%d %H:%M:%S " ))    # 2019-03-30 23 :44:32 
print (time.strftime( " %Y/%m/%d %H:%M:%S " ))    # 2019/03/30 23:44:32 
print (time.strftime( " %H :%M:%S " ))     # 23:44:32

# 结构化时间
struct_time = time.localtime()
print(struct_time)  # time.struct_time(tm_year=2019, tm_mon=3, tm_mday=30, tm_hour=23, tm_min=45, tm_sec=54, tm_wday=5, tm_yday=89, tm_isdst=0)
print(struct_time.tm_year)  # 2019

import time
 #Convert timestamp time to formatted time 
t = time.time()
 print (t)
 #Convert the determined timestamp can be converted with localtime 
print (time.localtime(1553962314 ))
 #Convert the variable time of dynamic assignment can be used gmtime conversion 
print (time.gmtime(t)) #Formatted
 time is converted into timestamp time with mktime conversion 
print (time.mktime(time.localtime()))
 
#Running result: # 1553962325.1933188 
# time.struct_time(tm_year=2019 , tm_mon=3, tm_mday=31, tm_hour=0, tm_min=11, tm_sec=54, tm_wday=6, tm_yday=90, tm_isdst=0) 
# time.struct_time(tm_year=2019, tm_mon=3, tm_mday=30, tm_hour=16, tm_min=12, tm_sec=5, tm_wday=5, tm_yday=89, tm_isdst=0)
# 1553962325.0

#Convert string time to structured time. Converting with strptime requires a specified format 
print (time.strptime( ' 2000-12.31 ' , ' %Y-%m.%d ' ))
     # time.struct_time(tm_year=2000, tm_mon =12, tm_mday=31, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=6, tm_yday=366, tm_isdst=-1) #Convert 
structured   time to string time strftime conversion requires a specified format 
print (time .strftime( ' %m/%d/%Y %H:%M:%S ' ,time.localtime(3000000000)))     # 01/24/2065 13:20:00

#Some comfortable display 
print (time.asctime())    # Sun Mar 31 00:24:40 2019 
print (time.asctime(time.localtime(150000000)))   # Thu Oct 3 10:40:00 1974 
print (time .ctime())      # Sun Mar 31 00:26:46 2019 
print (time.ctime(150000000))     # Thu Oct 3 10:40:00 1974

#Calculate time difference 
true_time = time.mktime(time.strptime( ' 2017-09-11 08:30:00 ' , ' %Y-%m-%d %H:%M:%S ' ))
now_time = time.mktime(time.strptime('2017-09-12 11:00:00','%Y-%m-%d %H:%M:%S'))
dif_time = now_time - true_time
struct_time = time.gmtime(dif_time)
 print ( ' The past %d years %d months %d days %d hours %d minutes %d seconds ' %(struct_time.tm_year-1970,struct_time.tm_mon-1 ,
                                            struct_time.tm_mday-1,struct_time.tm_hour,
                                            struct_time.tm_min,struct_time.tm_sec))
# 0 years, 0 months, 1 day, 2 hours, 30 minutes, 0 seconds have passed