.data: export ohlc dtypes at top level

piker/data/__init__.py

@@ -22,9 +22,6 @@ and storing data from your brokers as well as
 sharing live streams over a network.
 
 """
-import tractor
-import trio
-
 from ._util import (
     get_console_log,
 )
@@ -36,6 +33,10 @@ from ._sharedmem import (
     get_shm_token,
     ShmArray,
 )
+from ._source import (
+    base_iohlc_dtype,
+    base_ohlc_dtype,
+)
 from .feed import (
     open_feed,
 )
@@ -49,4 +50,6 @@ __all__ = [
     'attach_shm_array',
     'open_shm_array',
     'get_shm_token',
+    'base_iohlc_dtype',
+    'base_ohlc_dtype',
 ]