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This article introduces the relevant knowledge of "how to achieve quarterly statistics by python". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Actual combat scene

Require quarterly statistics on the consumption of agents from the date of registration.

Abstract scene

The start and end time of each quarter from the default time point

Investigation point

The use of datetime Library

Yield

Code implementation

From datetime import datetime

Import calendar

Def startDate (cls, dazzles 2017-03-01 0015):

Init = datetime.strptime (str,'% Y-%m-%d% HGV% MVA% S') # default time

Now = datetime.now () # current time

Start = now.replace (day=1) # the beginning of the current month

Days = calendar.monthrange (start.year, start.month) # days of the month

End = start + timedelta (days [1]) # end of the current month

While end > init:

Result = (start, end)

Yield result

End = start

Start = (start-timedelta (1)) .replace (day=1)

Implementation description

Flexible application of time object

You can also use a list implementation, but I used the yield implementation to deepen my understanding of yield

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