>>> import bulbea as bb
>>> share = bb.Share('YAHOO', 'GOOGL')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "bulbea/entity/share.py", line 166, in __init__
message = Color.warn("Environment variable {envvar} for Quandl hasn't been set. A maximum of {max_calls} calls per day can be made. Visit {url} to get your API key.".format(envvar = envvar, max_calls = QUANDL_MAX_DAILY_CALLS, url = ABSURL_QUANDL))
TypeError: unbound method warn() must be called with Color instance as first argument (got str instance instead)