TypeError when importing modin

System information

• Amazon linux (Centos):
• Modin installed from binary:
• Modin version: 0.2.2:
• Python version: 3.7.0:
• Ray version: 0.5.3
• import modin.pandas:

Describe the problem

I am getting an import error because of an unexpected argument use_raylet

Source code / logs

In [1]: import modin.pandas
---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-1-d42df328a6c7> in <module>()
----> 1 import modin.pandas

~/anaconda3/lib/python3.7/site-packages/modin/pandas/__init__.py in <module>()
     78             include_webui=False,
     79             redirect_worker_output=True,
---> 80             use_raylet=True,
     81         )
     82 except AssertionError:

TypeError: init() got an unexpected keyword argument 'use_raylet'

[devin-petersohn]

Hi @ek-nath, I did a bit more digging. It looks like you may have recently built Ray from source. We depend on the pypi release of Ray, and the ray.init API changed slightly since the last Ray release. If you want to resolve this issue, you will have to install Ray using pip (pip install ray).

cc @robertnishihara

[ek-nath]

Success @devin-petersohn

python -c "import modin.pandas"
Process STDOUT and STDERR is being redirected to /tmp/ray/session_2018-10-31_20-41-01_29838/logs.
Waiting for redis server at 127.0.0.1:12739 to respond...
Waiting for redis server at 127.0.0.1:17503 to respond...
Starting the Plasma object store with 6.4900694009999995 GB memory using /dev/shm.