In [1]: import xcollection as xc, xarray as xr

In [2]: ds = xr.DataArray(name='test')

In [3]: c = xc.Collection({'foo': xr.DataArray(name='foo'), 'bar': xr.DataArray(name='bar')})

In [4]: c
Out[4]: 
<Collection (2 keys)>
🔑 foo
<xarray.Dataset>
Dimensions:  ()
Data variables:
    foo      float64 nan

🔑 bar
<xarray.Dataset>
Dimensions:  ()
Data variables:
    bar      float64 nan

In [5]: c.tokens()
Out[5]: 
{'foo': 'b3833b28a0abdbd20ac2e504af93da29',
 'bar': '5628e75835f16e4d904f195bf7f661ac'}

In [6]: import dask.base

In [7]: c.tokens() == c.tokens()
Out[7]: True

In [8]: dask.base.tokenize(c)
Out[8]: '5b78ff477a522d18d12ac5b4939c71d3'

In [9]: dask.base.tokenize(c) == dask.base.tokenize(c)
Out[9]: True