datetimes

Question 1

Manually create one datetime object and also just its date (no hours/mins/secs)

Answer 1

given_dt = dt.datetime(2022, 9, 30)
given_date = given_dt.date()

Note: these are two different object types!

Question 2

Calculate unix time from datetime

Answer 2

(given_dt - dt.datetime(1970, 1, 1)).total_seconds()

Question 3

Create datetime object from date string

Answer 3

from dateutil.parser import parse
parse(date_string) # easy but slow

strptime(date_string, %Y-%M-%d) # or whatever

Question 4

Turn pandas date strings col into datetimes and also just dates (no hours/mins/secs)

Answer 4

pd.to_datetime(df.str_date_col).date()

Question 5

Create date string from datetime object

Answer 5

strftime(date_string, %Y-%M-%d) # or whatever