062 time module

time module

1.import time

2. timestamp

• Timestamp (timestamp): timestamp indicates that from January 1970 00:00:00 1st time in seconds calculated.

（模块名）time.time()（方法名）

3. Format time

• Formatted time string (format string): formatting time is an ordinary time string format.

time.strftime('%Y_%m_%d %X')  # 2019_08_16 10:26:36

4. Structured time

• Structured time (struct time): struct_time tuple total of nine elements were nine elements, respectively (year, month, day, hour, minute, second, the first few weeks of the year, day of the year, summer time)

time.localtime() # 当地时间（中国）
time.gmtime()  # 标准时间

# time.struct_time(tm_year=2019, tm_mon=8, tm_mday=16, tm_hour=19, tm_min=42, tm_sec=44, tm_wday=4, tm_yday=228, tm_isdst=0)

# time.struct_time(tm_year=2019, tm_mon=8, tm_mday=16, tm_hour=11, tm_min=42, tm_sec=44, tm_wday=4, tm_yday=228, tm_isdst=0)

The conversion of three kinds of time

1. Formatting time -----> Structured time

• strftime

print(time.strftime('%Y-%m-%d %X', time.localtime()))
# 2019-08-16 19:42:44

1. Formatting time ------> Structured time

• striptime

print(time.strptime('2019-08-16 10:30:44', '%Y-%m-%d %X'))
# time.struct_time(tm_year=2019, tm_mon=8, tm_mday=16, tm_hour=10, tm_min=30, tm_sec=44, tm_wday=4, tm_yday=228, tm_isdst=-1)

1. Structured -----> timestamps

• mktime

print(time.mktime(time.localtime()))
#  1565955764.0

1. Timestamp -----> Structured

• localtime

print(time.localtime(time.time()))
# time.struct_time(tm_year=2019, tm_mon=8, tm_mday=16, tm_hour=19, tm_min=42, tm_sec=44, tm_wday=4, tm_yday=228, tm_isdst=0)

Emphasis

time.time()

time.sleep()