use class methods in class variable python

Question

How can I use my format_date function for my class variable?

class DailyAggregator(Aggregator):
    time_dirty_data = self.format_date(datetime.datetime.now())
    
    @staticmethod
    def format_date(date):
        return date.replace(hour=0, minute=0, second=0, microsecond=0)

general03 · Accepted Answer · 2020-10-05 11:30:07Z

1

You need to use @classmethod decorator and use with reference Daily, like

class Daily(Aggregator):

    time_dirty_data = None

    def __init__(self):
        Daily.time_dirty_data = Daily.format_date(datetime.datetime.now())

    @classmethod
    def format_date(cls, date):
        return date.replace(hour=0, minute=0, second=0, microsecond=0)

print(Daily.time_dirty_data)
d = Daily()
print(Daily.time_dirty_data)

answered Oct 5, 2020 at 11:30

general03

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Comments

LeMorse · Accepted Answer · 2020-10-05 11:26:21Z

0

You need to instanciate your class.

Like this:

daily = Daily()
daily.format_date(your_date)

I think it's what you want ?

answered Oct 5, 2020 at 11:26

LeMorse

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1 Comment

general03 Over a year ago

your example is not for class variable but instance variable !

Maheen Saleh · Accepted Answer · 2020-10-05 11:31:48Z

0

You can the method static and use like this:

@staticmethod
def format_date(date):
    return date.replace(hour=0, minute=0, second=0, microsecond=0)

time_dirty_data = format_date.__func__(datetime.datetime.now())

answered Oct 5, 2020 at 11:31

Maheen Saleh

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