A module providing some useful date functions
Seems like I constantly need some kind of date functions that aren’t found (or aren’t found easily enough anyway) in the standard library or in 3rd party packages that I use regularly. This library attempts to remedy that so I know where to add the functions when I build them and know where to look for them when I need them.
There are no dependancies to install. You just need to:
pip install datefns
git clone firstname.lastname@example.org:ktr/datefns.git cd datefns python setup.py install
Once installed, you can iterate through the entire file without using much memory by doing the following:
import datefns, datetime d1 = datetime.date(2018, 7, 10) d2 = datetime.date(2018, 12, 31) we = datefns.week_ending(d1, week_ends_on='Sun') ds = datefns.date_table(d1, d2) me = datefns.eomonth(d1, 5) # datetime.date(2018, 12, 31) ts = datefns.time_table() datefns.date_table_to_csv(ds, '/path/to/date-file.csv', overwrite=True) datefns.time_table_to_csv(ts, '/path/to/time-file.csv', overwrite=True) import sqlite3 conn = sqlite3.connect(':memory:') datefns.load_date_table(conn, datefns.date_table(start_date=d1, end_date=d2)) datefns.load_time_table(conn, ts) ds = datefns.date_range(d1, d2, datefns.by_month)
To run tests:
python -m tests.test_datefns
The project is licensed under the MIT License - see the LICENSE.md file for details
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