python-Time Module

One, Time module

Let's start by introducing some of the time-representation methods you'll use.

(1) Timestamp: Refers to how many seconds have elapsed since the beginning of the Unix period, such as the first article of the result;

(2) Time tuple: In the last 2 lines of the command, the output is the time tuple format.

(3) Self-formatted time, that is, the second run results, you can define the time display format.

It is commonly used as follows:

Time stamps and well-formatted time are converted to each other, requiring a bridge, which is the time tuple.

Example 1: Converting a timestamp to a formatted time, shown in the format: year-month-day time: minutes: seconds.

Analysis: The first step should be to convert the timestamp into a time tuple, i.e. use Time.localtime (). The second step is to convert the time tuple into a well-formatted time, that is, using Time.strftime ()

Import TimedefTimestamp_to_format (timestamp = None,format ='%y-%m-%d%h:%m:%s'):    #1, the default return to the current format good time    #2, to the time stamp, the time stamp into a format good time, return    ifTimestamp:time_tuple=time.localtime (timestamp) Res=time.strftime (format,time_tuple)Else: Res= time.strftime (format)#default fetch Current time    returnResresult=Timestamp_to_format ()Print(Result)

Example 2: Convert a formatted time into a timestamp.

Analysis: First convert the formatted time into a time tuple, and then convert the time tuple into a timestamp.

Import TimedefStrtotimestamp (str=none,format='%y%m%d%h%m%s'):    ifStr:#If you pass the time,TP = Time.strptime (Str,format)#format a good time, turn it into a time tupleres = TIME.MKTIME (TP)#and turn it into a timestamp .    Else: Res= Time.time ()#default Fetch current timestamp    returnInt (res) result= Strtotimestamp (str='2018-5-3 19:47:32', format='%y-%m-%d%h:%m:%s')Print(Result)

Second, the DateTime module

Among them, Datetime.timedelta () is optionally available in parentheses with weeks,days,minutes,seconds, such as:

python-Time Module