Config from variable or file

This replaces the old file of credentials (with one per line) with a
configuration in YAML format.

The configuration can be stored either in a file or in an environment variable
(BITTER_CONFIG).

There is still a command line argument to add the credentials in that file to
the config.

.gitignore

@@ -2,6 +2,7 @@ __pycache__
 *.egg-info
 dist
 env
+.env
 __*
 .*
 *.pyc

Makefile

@@ -19,7 +19,7 @@ Dockerfile-%: Dockerfile.template
 dev-%:
 	@docker start $(NAME)-dev$* || (\
 		$(MAKE) build-$*; \
-		docker run -d -w /usr/src/app/ -v $$PWD:/usr/src/app --entrypoint=/bin/bash -ti --name $(NAME)-dev$* '$(IMAGEWTAG)-python$*'; \
+		docker run -d -w /usr/src/app/ --env-file $$PWD/.env -v $$PWD:/usr/src/app --entrypoint=/bin/bash -ti --name $(NAME)-dev$* '$(IMAGEWTAG)-python$*'; \
 	)\
 
 	docker exec -ti $(NAME)-dev$* bash
@@ -71,6 +71,6 @@ pip_upload:
 pip_test: $(addprefix pip_test-,$(PYVERSIONS))
 
 run: build
-	docker run --rm -p 5000:5000 -ti '$(REPO)/$(NAME):$(VERSION)-python$(PYMAIN)'
+	docker run --rm --env-file $$PWD/.env -p 5000:5000 -ti '$(REPO)/$(NAME):$(VERSION)-python$(PYMAIN)'
 
 .PHONY: test test-% build-% build test test_pip run

README.md

@@ -29,16 +29,66 @@ e.g. to get the latest 500 tweets by the python software foundation:
 ```
 bitter api statuses/user_timeline --id thepsf --count 500
 ```
-# Credentials format
+
+
+# Examples
+
+The CLI can query the rest API:
 
 ```
-{"user": "balkian", "consumer_secret": "xxx", "consumer_key": "xxx", "token_key": "xxx", "token_secret": "xxx"}
+bitter api <URL endpoint> --parameter VALUE ... | [--tweets | --users] [--max_count MAX_COUNT] [--count COUNT_PER_CALL]
 ```
 
-By default, bitter uses '~/.bitter-credentials.json', but you may choose a different file:
+For instance:
 
 ```
-python -m bitter -c <credentials_file> ...
+# Get 100 tweets that mentioned Obama after tweet 942689870501302300
+bitter api '/search/tweets' --since_id 942689870501302300 --count 100 --q Obama
+```
+
+That is equivalent to this call to the api: `api/1.1/searc/tweets?since_id=942689870501302300&count=100&q=Obama`.
+
+
+The flags `--tweets` and `--users` are optional.
+If you use them, bitter will try to intelligently fetch all the tweets/users by using pagination with the API.
+
+For example:
+
+```
+# Download 1000 tweets, 100 tweets per call.
+bitter api '/search/tweets' --since_id 942689870501302300 --count 100 --q Obama --max_count=1000 --tweets
+```
+
+```
+# Download all the followers of @balkian
+bitter api 'followers/list' --_id balkian --users --max_count -1
+```
+
+Note that some reserved words (such as `id`) have to be preceeded by an underscore.
+This limitation is imposed by the python-twitter library.
+
+# Configuration format
+
+```
+credentials:
+- user: "balkian"
+  consumer_secret: "xxx"
+  consumer_key: "xxx"
+  token_key: "xxx"
+  token_secret: "xxx"
+- user: ....
+```
+
+By default, bitter uses '~/.bitter.yaml', but you may choose a different file:
+
+```
+python -m bitter --config <config_file> ...
+```
+
+Or use an environment variable:
+
+```
+export BITTER_CONFIG=$(cat myconfig.yaml)
 ```
 
 # Server

bitter/VERSION

@@ -1 +1 @@
-0.7.4
+0.7.5

bitter/cli.py

@@ -29,16 +29,17 @@ logger = logging.getLogger(__name__)
 @click.group()
 @click.option("--verbose", is_flag=True)
 @click.option("--logging_level", required=False, default='WARN')
-@click.option("--config", required=False)
+@click.option('--config', show_default=True, default=bconf.CONFIG_FILE)
-@click.option('-c', '--credentials', show_default=True, default='~/.bitter-credentials.json')
+@click.option('--credentials', show_default=True, help="DEPRECATED: If specified, these credentials will be copied to the configuratation file.", default=bconf.CREDENTIALS)
 @click.pass_context
 def main(ctx, verbose, logging_level, config, credentials):
     logging.basicConfig(level=getattr(logging, logging_level))
     ctx.obj = {}
     ctx.obj['VERBOSE'] = verbose
-    ctx.obj['CONFIG'] = config
+    bconf.CONFIG_FILE = config
     bconf.CREDENTIALS = credentials
-    utils.create_credentials(credentials)
+    if os.path.exists(utils.get_config_path(credentials)):
+      utils.copy_credentials_to_config(credentials, config)
 
 @main.group()
 @click.pass_context 
@@ -51,7 +52,7 @@ def tweet(ctx):
 @click.option('-u', '--update', help="Update the file even if the tweet exists", is_flag=True, default=False)
 @click.argument('tweetid')
 def get_tweet(tweetid, write, folder, update):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     utils.download_tweet(wq, tweetid, write, folder, update)
         
 @tweet.command('get_all')
@@ -59,14 +60,14 @@ def get_tweet(tweetid, write, folder, update):
 @click.option('-f', '--folder', default="tweets")
 @click.pass_context
 def get_tweets(ctx, tweetsfile, folder):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     utils.download_tweets(wq, tweetsfile, folder)
 
 @tweet.command('search')
 @click.argument('query')
 @click.pass_context 
 def search(ctx, query):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     t = utils.search_tweet(wq, query)
     print(json.dumps(t, indent=2))
 
@@ -74,7 +75,7 @@ def search(ctx, query):
 @click.argument('user')
 @click.pass_context 
 def timeline(ctx, user):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     t = utils.user_timeline(wq, user)
     print(json.dumps(t, indent=2))
 
@@ -100,7 +101,7 @@ def list_users(ctx, db):
 @click.option('-f', '--folder', default="users")
 @click.option('-u', '--update', help="Update the file even if the user exists", is_flag=True, default=False)
 def get_user(user, write, folder, update):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     if not write:
         u = utils.get_user(wq, user)
         js = json.dumps(u, indent=2)
@@ -146,7 +147,7 @@ def crawl_users(ctx, usersfile, skip, until, threads, db):
             return ExitStack()
 
 
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     logger.info('Starting Network crawler with {} threads and {} credentials.'.format(threads,
                                                                                       len(wq.queue)))
 
@@ -310,7 +311,7 @@ def users_extractor(ctx):
 @click.pass_context
 def extract(ctx, recursive, user, name, initfile):
     print(locals())
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     dburi = ctx.obj['DBURI']
     utils.extract(wq,
                   recursive=recursive,
@@ -322,7 +323,7 @@ def extract(ctx, recursive, user, name, initfile):
 @extractor.command('reset')
 @click.pass_context
 def reset_extractor(ctx):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     db = ctx.obj['DBURI']
     session = make_session(db)
     session.query(ExtractorEntry).filter(ExtractorEntry.pending==True).update({'pending':False})
@@ -331,7 +332,7 @@ def reset_extractor(ctx):
 @click.argument('url', required=False)
 @click.pass_context
 def get_limits(ctx, url):
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
     for worker in wq.queue:
         resp = worker.client.application.rate_limit_status()
         print('#'*20)
@@ -351,27 +352,27 @@ def get_limits(ctx, url):
 
 @main.command(context_settings=dict(ignore_unknown_options=True, allow_extra_args=False))
 @click.argument('cmd', nargs=1)
+@click.option('--tweets', is_flag=True, help='Fetch more tweets using smart pagination. Use --count to control how many tweets to fetch per call, and --max_count to set the number of desired tweets (or -1 to get as many as possible).', type=bool, default=False)
+@click.option('--users', is_flag=True, help='Fetch more users using smart pagination. Use --count to control how many users to fetch per call, and --max_count to set the number of desired users (or -1 to get as many as possible).', type=bool, default=False)
 @click.argument('api_args', nargs=-1, type=click.UNPROCESSED)
 @click.pass_context
-def api(ctx, cmd, api_args):
+def api(ctx, cmd, tweets, users, api_args):
     opts = {}
     i = iter(api_args)
     for k, v in zip(i, i):
         k = k.replace('--', '')
         opts[k] = v
-    wq = crawlers.TwitterQueue.from_credentials(bconf.CREDENTIALS)
+    wq = crawlers.TwitterQueue.from_config(bconf.CONFIG_FILE)
-    resp = utils.consume_feed(wq[cmd], **opts)
+    if tweets:
-    # A hack to stream jsons
+        resp = utils.consume_tweets(wq[cmd], **opts)
-    print('[')
+    elif users:
-    first = True
+        resp = utils.consume_users(wq[cmd], **opts)
-    for i in resp:
-        if not first:
-            print(',')
     else:
-            first = False
+        resp = wq[cmd](**opts)
-        
+        print(json.dumps(resp))
-        print(json.dumps(i, indent=2))
+        return
-    print(']')
+    for i in resp:
+        print(json.dumps(i))
 
 
 @main.command('server')
@@ -396,7 +397,7 @@ def stream(ctx):
 @click.option('-p', '--politelyretry', help='Politely retry after a hangup/connection error', is_flag=True, default=True)
 @click.pass_context 
 def get_stream(ctx, locations, track, file, politelyretry):
-    wq = crawlers.StreamQueue.from_credentials(bconf.CREDENTIALS, 1)
+    wq = crawlers.StreamQueue.from_config(bconf.CONFIG_FILE, 1)
 
     query_args = {}
     if locations:

bitter/config.py

@@ -11,3 +11,4 @@ E.g.:
     app.run()
 '''
 CREDENTIALS = '~/.bitter-credentials.json'
+CONFIG_FILE = '~/.bitter.yaml'

bitter/crawlers.py

@@ -58,6 +58,16 @@ class FromCredentialsMixin(object):
             wq.ready(cls.worker_class(cred["user"], cred))
         return wq
     
+class FromConfigMixin(object):
+
+    @classmethod
+    def from_config(cls, conffile=None, max_workers=None):
+        wq = cls()
+
+        with utils.config(conffile) as c:
+          for cred in islice(c['credentials'], max_workers):
+              wq.ready(cls.worker_class(cred["user"], cred))
+        return wq
 
 class TwitterWorker(object):
     api_class = None
@@ -110,6 +120,7 @@ class RestWorker(TwitterWorker):
         return max(0, (reset-now))
 
     def get_limit(self, uriparts):
+        uriparts = list(u for u in uriparts if u)
         uri = '/'+'/'.join(uriparts)
         for (ix, i) in self.limits.get('resources', {}).get(uriparts[0], {}).items():
             if ix.startswith(uri):
@@ -142,7 +153,7 @@ class RestWorker(TwitterWorker):
 class QueueException(BaseException):
     pass
 
-class QueueMixin(AttrToFunc, FromCredentialsMixin):
+class QueueMixin(AttrToFunc, FromCredentialsMixin, FromConfigMixin):
     def __init__(self, wait=True):
         logger.debug('Creating worker queue')
         self.queue = set()

bitter/utils.py

@@ -3,6 +3,8 @@ from __future__ import print_function
 import logging
 import time
 import json
+import yaml
+import io
 
 import signal
 import sys
@@ -49,31 +51,74 @@ def parallel(func, source, chunksize=1, numcpus=multiprocessing.cpu_count()):
         yield i
 
 
-def get_credentials_path(credfile=None):
+def get_config_path(conf=None):
-    if not credfile:
+    if not conf:
-        if config.CREDENTIALS:
+        if config.CONFIG_FILE:
-            credfile = config.CREDENTIALS
+            conf = config.CONFIG_FILE
         else:
-            raise Exception('No valid credentials file')
+            raise Exception('No valid config file')
-    return os.path.expanduser(credfile)
+    return os.path.expanduser(conf)
+
+
+def copy_credentials_to_config(credfile, conffile=None):
+      p = get_config_path(credfile)
+      with open(p) as old:
+          for line in old:
+              cred = json.loads(line.strip())
+              add_credentials(conffile, **cred)
+
+
+def save_config(conf, conffile=None):
+    with config(conffile) as c:
+        c.clear()
+        c.update(conf)
 
 
 @contextmanager
-def credentials_file(credfile, *args, **kwargs):
+def config(conffile=None):
-    p = get_credentials_path(credfile)
+    d = read_config(conffile)
-    with open(p, *args, **kwargs) as f:
+    try:
-        yield f
+        yield d
+    finally:
+        write_config(d, conffile)
 
 
-def iter_credentials(credfile=None):
+def read_config(conffile):
-    with credentials_file(credfile) as f:
+    p = conffile and get_config_path(conffile)
-        for l in f:
+    if p and os.path.exists(p):
-            yield json.loads(l.strip())
+        f = open(p, 'r')
+    elif 'BITTER_CONFIG' not in os.environ:
+        raise Exception('No config file or BITTER_CONFIG env variable.')
+    else:
+        f = io.StringIO(os.environ.get('BITTER_CONFIG', "").strip().replace('\\n', '\n'))
+    return yaml.load(f) or {'credentials': []}
 
 
-def get_credentials(credfile=None, inverse=False, **kwargs):
+def write_config(conf, conffile=None):
+    if conffile:
+        p = get_config_path(conffile)
+        with open(p, 'w') as f:
+            yaml.dump(conf, f)
+    else:
+        os.environ['BITTER_CONFIG'] = yaml.dump(conf)
+
+def iter_credentials(conffile=None):
+    with config(conffile) as c:
+        for i in c['credentials']:
+            yield i
+
+
+def create_config_file(conffile=None):
+    if not conffile:
+        return
+    conffile = get_config_path(conffile)
+    with open(conffile, 'a'):
+        pass
+
+    
+def get_credentials(conffile=None, inverse=False, **kwargs):
     creds = []
-    for i in iter_credentials(credfile):
+    for i in iter_credentials(conffile):
         matches = all(map(lambda x: i[x[0]] == x[1], kwargs.items()))
         if matches and not inverse:
             creds.append(i)
@@ -82,26 +127,18 @@ def get_credentials(credfile=None, inverse=False, **kwargs):
     return creds
 
 
-def create_credentials(credfile=None):
+def delete_credentials(conffile=None, **creds):
-    credfile = get_credentials_path(credfile)
+    tokeep = get_credentials(conffile, inverse=True, **creds)
-    with credentials_file(credfile, 'a'):
+    with config(conffile) as c:
-        pass
+        c['credentials'] = list(tokeep)
 
 
-def delete_credentials(credfile=None, **creds):
+def add_credentials(conffile=None, **creds):
-    tokeep = get_credentials(credfile, inverse=True, **creds)
+    exist = get_credentials(conffile, **creds)
-    with credentials_file(credfile, 'w') as f:
+    if exist:
-        for i in tokeep:
+        return
-            f.write(json.dumps(i))
+    with config(conffile) as c:
-            f.write('\n')
+        c['credentials'].append(creds)
-
-
-def add_credentials(credfile=None, **creds):
-    exist = get_credentials(credfile, **creds)
-    if not exist:
-        with credentials_file(credfile, 'a') as f:
-            f.write(json.dumps(creds))
-            f.write('\n')
 
 
 def get_hashtags(iter_tweets, best=None):
@@ -116,7 +153,7 @@ def read_file(filename, tail=False):
         while True:
             line = f.readline()
             if line not in (None, '', '\n'):
-                tweet = json.loads(line.strip())
+                tweet = json.load(line.strip())
                 yield tweet
             else:
                 if tail:
@@ -403,7 +440,7 @@ def download_tweet(wq, tweetid, write=True, folder="downloaded_tweets", update=F
     tweet = None
     if update or not cached:
         tweet = get_tweet(wq, tweetid)
-        js = json.dumps(tweet, indent=2)
+        js = json.dump(tweet, indent=2)
     if write:
         if tweet:
             write_tweet_json(js, folder)
@@ -484,31 +521,72 @@ def download_timeline(wq, user):
     return wq.statuses.user_timeline(id=user)
 
 
-def consume_feed(func, *args, **kwargs):
+def _consume_feed(func, feed_control=None, **kwargs):
     '''
     Get all the tweets using pagination and a given method.
     It can be controlled with the `count` parameter.
 
-    If count < 0 => Loop until the whole feed is consumed.
+    If max_count < 0 => Loop until the whole feed is consumed.
-    If count == 0 => Only call the API once, with the default values.
+    If max_count == 0 => Only call the API once, with the default values.
-    If count > 0 => Get count tweets from the feed.
+    If max_count > 0 => Get max_count tweets from the feed.
     '''
-    remaining = int(kwargs.pop('count', 0))
+    remaining = int(kwargs.pop('max_count', 0))
-    consume = remaining < 0
+    count = int(kwargs.get('count', -1))
     limit = False
 
-    # Simulate a do-while by updating the condition at the end
+    # We need to at least perform a query, so we simulate a do-while
+    # by running once with no limit and updating the condition at the end
+    with tqdm(total=remaining) as pbar:
       while not limit:
-        if remaining > 0:
+          if remaining > 0 and  ((count < 0) or (count > remaining)):
               kwargs['count'] = remaining
-        resp = func(*args, **kwargs)
+          resp, stop = feed_control(func, kwargs, remaining=remaining, batch_size=count)
           if not resp:
               return
-        for t in resp:
+          for entry in resp:
-            yield t
+              yield entry
-        if consume:
+          pbar.update(len(resp))
+          limit = stop
+          if remaining < 0:
+              # If the loop was run with a negative remaining, it will only stop
+              # when the control function tells it to.
               continue
+          # Otherwise, check if we have already downloaded all the required items
           remaining -= len(resp)
-        max_id = min(s['id'] for s in func(*args, **kwargs)) - 1
+          limit = limit or remaining <= 0
-        kwargs['max_id'] = max_id
+
-        limit = remaining <= 0
+
+def consume_tweets(*args, **kwargs):
+    return _consume_feed(*args, feed_control=_tweets_control, **kwargs)
+
+
+def consume_users(*args, **kwargs):
+    return _consume_feed(*args, feed_control=_users_control, **kwargs)
+
+
+def _tweets_control(func, apiargs, remaining=0, **kwargs):
+    ''' Return a list of entries, the remaining '''
+    
+    resp = func(**apiargs)
+    if not resp:
+        return None, True
+    # Update the arguments for the next call
+    # Two options: either resp is a list, or a dict like:
+    #    {'statuses': ... 'search_metadata': ...}
+    if isinstance(resp, dict) and 'search_metadata' in resp:
+        resp = resp['statuses']
+    max_id = min(s['id'] for s in resp) - 1
+    apiargs['max_id'] = max_id
+    return resp, False
+
+
+def _users_control(func, apiargs, remaining=0, **kwargs):
+    resp = func(**apiargs)
+    stop = True
+    # Update the arguments for the next call
+    if 'next_cursor' in resp:
+        cursor = resp['next_cursor']
+        apiargs['cursor'] = cursor
+        if int(cursor) != -1:
+            stop = False
+    return resp['users'], stop

requirements.txt

@@ -2,3 +2,4 @@ sqlalchemy
 twitter
 click
 tqdm
+pyyaml

tests/test_crawlers.py

@@ -12,7 +12,11 @@ from bitter import config as c
 class TestCrawlers(TestCase):
 
     def setUp(self):
-        self.wq = easy(os.path.join(os.path.dirname(__file__), 'credentials.json'))
+        CONF_PATH = os.path.join(os.path.dirname(__file__), '.bitter.yaml')
+        if os.path.exists(CONF_PATH):
+            self.wq = easy(CONF_PATH)
+        else:
+            self.wq = easy()
 
     def test_create_worker(self):
         assert len(self.wq.queue)==1

tests/test_utils.py

@@ -8,56 +8,65 @@ from bitter import config as c
 
 class TestUtils(TestCase):
 
+    configfile = '/tmp/bitter.yaml'
+
     def setUp(self):
-        self.credfile = '/tmp/credentials.txt'
+        c.CONFIG_FILE = self.configfile
-        c.CREDENTIALS = self.credfile
+        if os.path.exists(self.configfile):
-        if os.path.exists(self.credfile):
+            os.remove(self.configfile)
-            os.remove(self.credfile)
+        assert not os.path.exists(self.configfile)
-        utils.create_credentials(self.credfile)
+        utils.create_config_file(self.configfile)
-        
+        assert os.path.exists(self.configfile)
-
-    def test_create_credentials(self):
-        assert os.path.exists(self.credfile)
-        os.remove(self.credfile)
-        utils.create_credentials() # From config
-        assert os.path.exists(self.credfile)
         
     def test_add_credentials(self):
-        utils.add_credentials(self.credfile, user="test")
+        utils.add_credentials(self.configfile, user="test")
-        assert utils.get_credentials(self.credfile)
+        assert utils.get_credentials(self.configfile)
-        assert utils.get_credentials(user="test")
+        assert utils.get_credentials(self.configfile, user="test")
-        assert list(utils.get_credentials(user="test"))[0]["user"] == "test"
+        assert list(utils.get_credentials(self.configfile, user="test"))[0]["user"] == "test"
 
     def test_get_credentials(self):
-        utils.add_credentials(self.credfile, user="test")
+        utils.add_credentials(self.configfile, user="test")
-        assert utils.get_credentials(user="test")
+        assert utils.get_credentials(self.configfile, user="test")
-        assert not utils.get_credentials(user="test", inverse=True)
+        assert not utils.get_credentials(self.configfile, user="test", inverse=True)
 
     def test_add_two_credentials(self):
-        utils.add_credentials(self.credfile, user="test")
+        utils.add_credentials(self.configfile, user="test")
-        utils.add_credentials(self.credfile, user="test2")
+        utils.add_credentials(self.configfile, user="test2")
-        assert utils.get_credentials(user="test")
+        assert utils.get_credentials(self.configfile, user="test")
-        assert utils.get_credentials(user="test2")
+        assert utils.get_credentials(self.configfile, user="test2")
 
 
     def test_delete_credentials(self):
-        utils.add_credentials(self.credfile, user="test")
+        utils.add_credentials(self.configfile, user="test")
-        assert utils.get_credentials(user="test")
+        assert utils.get_credentials(self.configfile, user="test")
-        utils.delete_credentials(user="test")
+        utils.delete_credentials(self.configfile, user="test")
-        print(utils.get_credentials())
+        assert not utils.get_credentials(self.configfile, user="test")
-        assert not utils.get_credentials(user="test")
 
     def test_parallel(self):
         import time
         def echo(i):
-            time.sleep(2)
+            time.sleep(0.5)
             return i
         tic = time.time()
         resp = utils.parallel(echo, [1,2,3])
         assert isinstance(resp, types.GeneratorType)
         assert list(resp) == [1,2,3]
         toc = time.time()
-        assert (tic-toc) < 6000
+        assert (tic-toc) < 600
         resp2 = utils.parallel(echo, [1,2,3,4], chunksize=2)
         assert list(resp2) == [1,2,3,4]
 
+
+class TestUtilsEnv(TestUtils):
+    configfile = None
+
+    def setUp(self):
+        if 'BITTER_CONFIG' in os.environ:
+          self.oldenv = os.environ['BITTER_CONFIG']
+        os.environ['BITTER_CONFIG'] = ''
+
+    def tearDown(self):
+        if hasattr(self, 'oldenv'):
+            os.environ['BITTER_CONFIG'] = self.oldenv
+        
+