'RasterDataCollection' object has no attribute 'crs'

[dementiev]

When trying to execute last polygons time-series example from https://github.com/OpenGeoscience/geonotebook/blob/master/notebooks/04_Annotations.ipynb
I got:

---

AttributeError Traceback (most recent call last)
in ()
9
10 for p in M.layers.annotation.polygons:
---> 11 layer, data = next(p.data)
12 time, lat, lon = data.shape
13 ax.plot(data.reshape(time, lat * lon).mean(axis=1),

/usr/local/lib/python2.7/dist-packages/geonotebook/annotations.pyc in data(self)
63 if getattr(layer, 'can_subset', False) and
64 hasattr(layer, "data") and layer.data is not None:
---> 65 yield layer, self.subset(layer.data, **self._kwargs)
66
67

/usr/local/lib/python2.7/dist-packages/geonotebook/annotations.pyc in subset(self, raster_data, **kwargs)
100 # Convert the image corner coordinates to WGS84
101 trgt_srs = CRS.from_string("EPSG:4326")
--> 102 src_srs = raster_data.crs
103 transformed = [transform_coordinates(src_srs, trgt_srs, [i[0]], [i[1]])
104 for i in raster_data.shape.exterior.coords]

AttributeError: 'RasterDataCollection' object has no attribute 'crs'