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Error when reading a .bz2 file with dask 0.7.5 #909

@apiszcz

Description

@apiszcz

Read plain CSV works.
Read bz2 compressed version fails, assume the pandas read_csv capability is not fully supported.
Note I also tested with dtype definition, same error.

partial strack trace
df = dd.read_csv(..., dtype={'my-column': float})

Pandas has given us the following error when trying to parse the file:

  "utf-8"

Traceback

File "lib\dask\async.py", line 263, in execute_task
result = _execute_task(task, data)
File "lib\dask\async.py", line 245, in _execute_task
return func(*args2)
File "lib\dask\dataframe\io.py", line 69, in _read_csv
raise ValueError(msg)

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