Custom Business Month

[bjonen]

This extends the offsets.py module with a CBMonthEnd based on CustomBusinessDay. Tests are found in test_offsets.py.

A few small points still open:

• Implement CBMonthBegin
• Improve speed. Main speed drag is DateOffset.onOffset.

Also some of the tests are not passing, but the errors seem unrelated.
e.g.

======================================================================
ERROR: test_pickle (pandas.tseries.tests.test_timeseries.TestTimeSeries)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/benjamin/workspace/pandas/pandas/tseries/tests/test_timeseries.py", line 1827, in test_pickle
    p = pick.loads(pick.dumps(NaT))
  File "/usr/lib/python2.7/pickle.py", line 1382, in loads
    return Unpickler(file).load()
  File "/usr/lib/python2.7/pickle.py", line 858, in load
    dispatch[key](self)
  File "/usr/lib/python2.7/pickle.py", line 1133, in load_reduce
    value = func(*args)
TypeError: __new__() takes exactly one argument (2 given)

[jreback]

did u rebuild extensions? this was just added in cython

python setup.py build_ext --inplace

[bjonen]

Ok that was part of it. Apparently Travis is on numpy 1.6 so the CBMonth (requires numpy 1.7) tests are failing.

[jreback]

their are multiple versions of numpy tested with Travis
look at the very end of the build u can see the print_versions

[bjonen]

Ah good hint, found the problem, will send an update later tonight.

[bjonen]

I added CBMonthBegin and squashed the changes. Anything else to do?

[jreback]

pls rebase (u need to incorporate #6873 the apply_nat)

[bjonen]

How should I reference the enhancement in v0.14.0.txt? :issue:6866 ?

[jreback]

yep (when no associated issue the pr number works too)

[bjonen]

Rebased, added a small section to the docs. Anything else?

[jreback]

can u do the Apply_nat decorator like other apply? it's just more consistent that way

@jorisvandenbossche @TomAugspurger

comments?

[jreback]

@bjonen can you rebase?

[bjonen]

done

[jreback]

thank you sir!

[jreback]

FYI, had to do this little patch a189d5d

was failing on windows 2.6 for some reason (and not sure why didn't fail on linux)

[bjonen]

Ok, thanks!