bblog.py

import requests, re, sys
from urllib import urlencode

refs = [(ref[0] == '^' and 'exclude' or 'include', re.sub(r'^\^', '', ref))
        for ref in sys.argv[2:]]
url = ('/2.0/repositories/%s/commits?%s' % (sys.argv[1], urlencode(refs)))

while url:
    doc = requests.get('https://api.bitbucket.org' + url).json()
    for cset in doc['values']:
        print cset['hash'][:7], cset['message'].splitlines()[0]
    url = doc.get('next')

Traverses the commits in a Bitbucket repo:

$ python bblog.py pypy/pypy release-2.0.2 ^release-2.0.1

analogous to what git log would give:

$ git log --oneline --date-order ref1 ref2 ^ref3 ...