Overview

dtrange has multi-calendar datetime, date and time range iterators.

Features

• Half-open or closed bounds.
• Non-uniform step date units, such as leap years and months.
• Alternative calendars: 360, all-leap, no-leap, gregorian, julian
• Data ordinals (total days) and time ordinals for all calendar types.
• Fraction arithmetic.
• [lower, upper) bounds search.
• Python 2 & 3.

Examples

Datetime

from datetime import datetime, timedelta
from dtrange import dtrange

start = datetime(2000, 1, 1)
stop  = datetime(2020, 2, 1)
step = timedelta(1)

for it in dtrange(start, stop, step, endpoint=True):
    print(it)

for units in ['y', 'm', 'w', 'd', 'h', 'min', 's', 'ms', 'us']:
    for it in dtrange(start, stop, step=1, units=units):
        print(units,it)

for it in dtrange(start, stop, n=10):
    print(it)

for it in dtrange(start, step, n=10):
    print(it)

for units in ['y', 'm', 'w', 'd', 'h', 'min', 's', 'ms', 'us']:
    for it in dtrange(start, step=1, units=units, n=10):
        print(units,it)

from dtrange import dtfraction

print(dtfraction(datetime(2000,1,1), datetime(2001,1,1), datetime(2002,1,1)))

Date

from datetime import date, timedelta
from dtrange import drange

start = date(2000, 1, 1)
stop  = date(2005, 2, 1)
step = timedelta(days=1)

for calendar in ['360', 'gregorian', 'julian', 'leap', 'noleap']:
    for it in drange(start, stop, step, calendar=calendar):
        print(calendar,it)

from dtrange import dfraction

print(dfraction(date(2000,1,1), date(2001,1,1), date(2002,1,1)))

Time

from datetime import time, timedelta
from dtrange import trange

start = time(0, 0, 0)
stop  = time(0, 1, 0)
step = timedelta(seconds=1)

for it in trange(start, stop, step):
    print(it)

from dtrange import tfraction

print(tfraction(time(1,1,1), time(2,1,1), time(3,1,1)))

Testing

make test

Installation

From PyPi.

pip install dtrange

From tarball.

python setup.py install

License

dtrange Copyright (C) 2016 Remik Ziemlinski

This program comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to redistribute it under the conditions of the GPLv3 license.