create.py

import os
import random

import feather  # pip install feather-format
import pandas as pd
import pandas.util.testing as tm

dates = pd.date_range('2016-01-01', '2016-01-31')
alphabet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

symbols = [''.join(random.choice(alphabet)
                   for i in range(random.randint(2, 4)))
           for i in range(10)]

for date in dates:
    date = str(date).split()[0]
    os.mkdir(date)
    for symbol in random.sample(symbols, random.randint(5, 10)):
        filename = os.path.join(date, symbol)
        df = tm.makeTimeDataFrame(1000).reset_index(drop=True)
        feather.write_dataframe(df, filename)

Imperative-Feather.ipynb

Hi, I tried from dask import delayed and from dask.imperative import delayed but still got the same error message ImportError: cannot import name delayed. My installed dask version is 0.8.1, and I couldn't find the delayed function. I think the parallel computation is interesting, could you tell me how to fix it? Thanks!

I ran into this same issue when trying Dask for the first time. In my case, the issue was really silly. I had created a file called dask.py, in which I added the line 'from dask import delayed'. A very poor name choice - the collision causes the interpreter to look for delayed in the top level program. ugh. Before I figured this out, I did a search for this error string and found very few results (it got me here) - so I suspect this actually could be your issue. random.