Default pip installation of Dask gives “ImportError: No module named toolz”
问题 I installed Dask using pip like this: pip install dask and when I try to do import dask.dataframe as dd I get the following error message: >>> import dask.dataframe as dd Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/path/to/venv/lib/python2.7/site-packages/dask/__init__.py", line 5, in <module> from .async import get_sync as get File "/path/to/venv/lib/python2.7/site-packages/dask/async.py", line 120, in <module> from toolz import identity ImportError: No