ImportError: No module named hddm

[Dan Bang]

Dear HDDM Users,

I can't import the hddm module - getting the error "ImportError: No module named hddm".

I'm using OS X El Capitan 10.11.2. This is how I went about installing the HDDM toolbox:

1. Download Python 3.51

2. Download Anaconda

3. Open Terminal --> type "conda install -c pymc hddm"

4. Open Idle --> type "import hddm"

Then I receive the error cited above.

I tried re-installing the HDDM toolbox. I'm then told:

# All requested packages already installed.

# packages in environment at /Users/dbang/anaconda:

#

hddm                      0.6.0                    py35_0    pymc

Any ideas what I might have done wrong?

I've tried adding "/Users/dbang/anaconda" to sys.path in Python.

I should add that I have no experience with Python, so solution might be obvious, but have escaped me.

Any help much appreciated!

Best wishes,

Dan Bang

Experimental Psychology, Oxford University

[Thomas Wiecki]

Hi,

Can you try with IPython Notebook instead?

Best,

Thomas

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[Dan Bang]

Hi Thomas,

I think this worked!

I get the "error":

//anaconda/lib/python3.5/site-packages/IPython/parallel.py:13: ShimWarning: The `IPython.parallel` package has been deprecated. You should import from ipyparallel instead.
  "You should import from ipyparallel instead.", ShimWarning)

However, I understand from earlier posts in the group that this error is harmless?

Thanks for quick reply!

Best wishes,

Dan

[Samuel Mathias]

Glad it's working. I think the issue you were having is that you have now two (or more) python versions installed on your mac. Macs come with a built-in python that's needed for OS stuff. When you type "python" into your terminal, you are probably running that version of python, not the version you just installed with anaconda (which you installed hddm into). To check this, you can type "which python" in the terminal. If you don't see "anaconda" in the printed path, then your default python version is still the original one ... or at least some other one that doesn't contain hddm. There are multiple ways to change this, you can find them if you consult the anaconda help pages.

[Dan Bang]

Hi Samuel,

I think the problem was that I lunched Python using IDLE [I don't know why this doesn't work on OS -- I could import hddm using IDLE on my Windows machine]. When I lunch python in terminal, then I can import hddm. That is, "which python" gives me an "anaconda" path. I just wanted to add these details in case someone else might experience similar problems.

Dan

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Dan Bang, PhD Student

Dept. Experimental Psychology, Oxford University

& Interacting Minds Centre, Aarhus University

http://www.psy.ox.ac.uk/team/students/dan-bang

[Sam Mathias]

In that case, IDLE is not using your anaconda python. In all likelihood, you have at least three python installations now: (1) the default system python, (2) python that uses IDLE, and (3) anaconda. My hunch is that you installed (2) during step 1 in your original post, which wasn't necessary, because anaconda includes python when you install it.

Hope this is clear! Python installation on a mac is incredibly confusing for beginners...

Samuel Robert Mathias

Postdoctoral Associate
Department of Psychiatry, Yale School of Medicine
Suite 3014, 2 Church Street South
New Haven, CT 06519
http://www.srmathias.com

[Dan Bang]

Ah I see -- you're absolutely right about: I installed python before installing anaconda! Better get rid of the useless version now :)

[Sam Mathias]

Be careful not to uninstall the system version!

Samuel Robert Mathias

Postdoctoral Associate
Department of Psychiatry, Yale School of Medicine
Suite 3014, 2 Church Street South
New Haven, CT 06519
http://www.srmathias.com

[Dan Bang]

On 12 January 2016 at 21:24, Sam Mathias <samuel....@gmail.com> wrote:

Be careful not to uninstall the system version!

Yes, I read about this! I didn't delete through terminal - only through icon in applications. Python still work from terminal. Thanks for help!