Time module of python module, time module of python Module

Time module of python module, time module of python Module
Time

• Three Forms of time
  • Timestamp: Generally, the timestamp indicates the offset calculated in seconds from 00:00:00, January 1, January 1, 1970. We run "type (time. time ()" and return the float type.
  • Formatted time String (Format String): '2017-12-06'
  • ''' % Y two-digit year indicates (00-99) % Y four-digit year indicates (000-9999) % m month (01-12) one day (0-31) % H 24-hour (0-23) % I 12-hour (01-12) in % d month) % M minutes (00 = 59) % S seconds (00-59) % a local simplified week name % A local full week name % B local simplified month name % B local full month name % c local corresponding date representation and Time Representation % j Years one day (001-366) % p local. m. or P. m. % U the number of weeks in a year (00-53) Sunday is the beginning of the week % w Week (0-6 ), sunday is the beginning of a week % W the number of weeks in a year (00-53) monday is the start of the week % x local corresponding date represents % X local corresponding time represents % Z Current Time Zone name % Number itself '''Time Format symbol
  • Tuples (struct_time): struct_time tuples have nine elements in total: (year, month, day, hour, minute, second, week of the year, day of the year, day of the year, etc.
    • "Index Attribute value (Values) 0 tm_year (year) for example 20111 tm_mon (month) 1-122 tm_mday (day) 1-313 tm_hour (hour) 0-234 tm_min (minute) 0-595 tm_sec (second) 0-616 tm_wday (weekday) 0-6 (0 indicates Sunday) 7 tm_yday (day of the year) 1-3668 tm_isdst (when it is enabled or not) is-1 "" by default """Element meaning of tuples

　　　　　

• Several formats of time in python

  • # Import time module> import time # timestamp> time. time () 1500875844.800804 # time string >>> time. strftime ("% Y-% m-% d % X") '2017-07-24 13:54:37 '> time. strftime ("% Y-% m-% d % H-% M-% S") '2017-07-24 13-55-04 '# Time tuples: localtime converts a timestamp to struct_time of the current time zone.
    Time. gmtime () time. localtime () time. struct_time (tm_year = 2017, tm_mon = 7, tm_mday = 24, tm_hour = 13, tm_min = 59, tm_sec = 37, tm_wday = 0, tm_yday = 205, tm_isdst = 0) # conclusion: The timestamp is the time that can be recognized by the computer; the time string is the time that people can understand; and The tuples are used to operate the time.

• Conversion between various formatting times

# Timestamp --> structured time # time. gmtime (timestamp) # UTC time, consistent with the local time in London # time. localtime (timestamp) # local time. For example, we now run this method in Beijing: the difference between this method and UTC time is 8 hours, And the UTC time + 8 hours = Beijing time >>> time. gmtime (1500000000) time. struct_time (maid = 2017, tm_mon = 7, tm_mday = 14, tm_hour = 2, tm_min = 40, tm_sec = 0, tm_wday = 4, tm_yday = 195, tm_isdst = 0) >>> time. localtime (1500000000) time. struct_time (tm_year = 2017, tm_mon = 7, tm_mday = 14, tm_hour = 10, tm_min = 40, tm_sec = 0, tm_wday = 4, tm_yday = 195, tm_isdst = 0) # structured time --> timestamp # time. mktime (structured time) >>> time_tuple = time. localtime (1500000000) >>> time. mktime (time_tuple) 1500000000.0

# Structured time --> string time # time. strftime ("format definition", "structured time") if the structured time parameter is not passed, the actual current time >>> time. strftime ("% Y-% m-% d % X") '2017-07-24 14:55:36 '> time. strftime ("% Y-% m-% d", time. localtime (1500000000) '2017-07-14 '# string time --> structured time # time. strptime (time string, string format) >>> time. strptime ("2017-03-16", "% Y-% m-% d") time. struct_time (maid = 2017, tm_mon = 3, tm_mday = 16, tm_hour = 0, tm_min = 0, tm_sec = 0, tm_wday = 3, tm_yday = 75, tm_isdst =-1) >>> time. strptime ("07/24/2017", "% m/% d/% Y") time. struct_time (tm_year = 2017, tm_mon = 7, tm_mday = 24, tm_hour = 0, tm_min = 0, tm_sec = 0, tm_wday = 0, tm_yday = 205, tm_isdst =-1)

 

# Structured time --> % a % B % d % H: % M: % S % Y string # time. asctime (structured time) If no parameter is input, the formatted string of the current time is directly returned> time. asctime (time. localtime (1500000000) 'fri Jul 14 10:40:00 100'> time. asctime () 'mon Jul 24 15:18:33 100' # % a % d % H: % M: % S % Y string --> structured time # time. ctime (timestamp) If no parameter is input, the formatted string of the current time is directly returned >>> time. ctime () 'mon Jul 24 15:19:07 2017 '> time. ctime (1500000000) 'fri Jul 14 10:40:00 123'

Import timetrue_time = time. mktime (time. strptime ('2017-09-11 08:30:00 ',' % Y-% m-% d % H: % M: % s') time_now = time. mktime (time. strptime ('2017-09-12 11:00:00 ',' % Y-% m-% d % H: % M: % s') dif_time = time_now-true_timestruct_time = time. gmtime (dif_time) print ('% 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 ))Calculation time difference