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ENH: Adds table_len method to BcolzMinuteBarReader (#1436)

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To get the length of the underlying table for a given sid.
This commit is contained in:
Andrew Daniels
2016-08-29 15:07:08 -04:00
committed by GitHub
parent 50e175bad2
commit 60c485c1ed
1 changed files with 4 additions and 0 deletions
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zipline/data/minute_bars.py
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@@ -1008,6 +1008,10 @@ class BcolzMinuteBarReader(MinuteBarReader):
return carray
def table_len(self, sid):
"""Returns the length of the underlying table for this sid."""
return len(self._open_minute_file('close', sid))
def get_sid_attr(self, sid, name):
sid_subdir = _sid_subdir_path(sid)
sid_path = os.path.join(self._rootdir, sid_subdir)