ModuleNotFoundError: No module named 'numpy.core._multiarray_umath' #73

ckyleda · 2019-01-08T12:41:30Z

When attempting to run the q01 example the following error occurs:

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'

Traceback (most recent call last):
File "/home/[REMOVED]/.local/share/virtualenvs/q01-9tU7-qwB/bin/pylivetrader", line 7, in
from pylivetrader.main import main
File "/home/[REMOVED]/.local/share/virtualenvs/q01-9tU7-qwB/lib/python3.6/site-packages/pylivetrader/init.py", line 16, in
from pylivetrader import api # noqa
File "/home/[REMOVED]/.local/share/virtualenvs/q01-9tU7-qwB/lib/python3.6/site-packages/pylivetrader/api.py", line 24, in
from pylivetrader.finance import execution, commission, slippage, cancel_policy
File "/home/[REMOVED]/.local/share/virtualenvs/q01-9tU7-qwB/lib/python3.6/site-packages/pylivetrader/finance/execution.py", line 22, in
import pylivetrader.misc.math_utils as zp_math
File "/home/[REMOVED]/.local/share/virtualenvs/q01-9tU7-qwB/lib/python3.6/site-packages/pylivetrader/misc/math_utils.py", line 53, in
nanmean = bn.nanmean
AttributeError: module 'bottleneck' has no attribute 'nanmean'

This is in a fresh pipenv after running pipenv install inside the example directory.

This could be due to the version of numpy (1.14.6) required not containing this module. However, official documentation on what _multiarray_umath actually is or when it was added is very sparse.

Testing numpy versions myself, I can import this module when using numpy 1.16.0rc2. Which dependency requires this version of numpy?

Has anyone run into this and resolved it?

ckyleda · 2019-01-08T14:45:40Z

This seems to be because bottleneck and bcolz aren't interacting correctly with the pipenv environment.

Installing them both manually via pip fixes this issue, but obviously you cannot do this on a heroku instance.

umitanuki · 2019-01-08T14:47:25Z

Recently someone else also reported numpy install issue in Heroku elsewhere. Something like heroku/heroku-buildpack-python#704 is closest. There might be an issue in their CLI or something.

ckyleda · 2019-01-08T14:49:53Z

@umitanuki This issue actually also occurs locally as well, I don't think it's purely a heroku issue.

ttt733 · 2019-01-09T23:59:41Z

quantopian/zipline#997

It looks like this is a known issue that can be caused by several things. If a clean install isn't working for you, can you walk us through the installation path you're using? It could be a cached wheel like someone mentioned there, or it could somehow be switching numpy versions unexpectedly.

ckyleda · 2019-01-10T11:30:47Z

@ttt733

I'm simply running 'pipenv install' inside the q01 folder.

I did manage to resolve this by using pipenv to generate a requirements.txt and installing using pip, after which I was able to proceed.

bibinmjose · 2019-01-17T15:08:31Z

I have the same problem when I try to load a pickled file

     19 def load_pickle(path):
     20     with open(path, 'rb') as handle:
---> 21         return pickle.load(handle)
     22 
     23 

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'

zchen0420 · 2019-01-20T10:54:32Z

I have the same problem when I try to load a pickled file

     19 def load_pickle(path):
     20     with open(path, 'rb') as handle:
---> 21         return pickle.load(handle)
     22 
     23 

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'

I had the same error with numpy=1.16
But safe with numpy=1.15

batrlatom · 2019-01-20T20:49:55Z

Had the same issue. Upgraded to numpy==1.16 and it works

bibinmjose · 2019-01-21T12:42:51Z

I have tried both and even checked out numpy's code. I can't find that module ('numpy.core._multiarray_umath') anywhere in numpy. Has anyone tried that?

wingkitlee0 · 2019-01-21T21:42:36Z

      I have tried both and even checked out numpy's code. I can't find that module ('numpy.core._multiarray_umath') anywhere in numpy. Has anyone tried that?

I found a few shared library files (*.so) in numpy/core/ , such as multiarray.cpython-36m-x86_64-linux-gnu.so .

saforem2 · 2019-01-21T23:24:23Z

@bibinmjose For what it's worth, same issue here when using pickle.load (pickle=4.0) with numpy=1.15.

bibinmjose · 2019-01-22T07:42:31Z

@saforem2 Me too noticed the problem when i try to unpickle a pickled bumpy array from another computer. I got around it by using python's statistics functions instead of numpy's. I tried to install numpy==16 but the story is the same. I was not able to upgrade numpy-base from 1.14 since it uninstalls a lot of dependencies.

bibinmjose · 2019-01-22T15:44:57Z

@saforem2 are you picking any numpy objects ? Try using another library. That might work.

saforem2 · 2019-01-22T22:18:02Z

@bibinmjose I believe the error occurred when trying to load a normal dictionary (containing some numpy arrays as values). I switched to a different conda environment with numpy.__version__=1.16.0 and pickle.format_version=4.0 and it seems to work fine so I was able to get around the issue.

jainraje · 2019-02-02T20:42:04Z

I have this error recently since a few changes on my MAC. I followed all the best practices and can't seem to resolve this error.

Upgraded to MAC High Sierra (10.13.6)
installed both python 3.6 and python 3.7 to run side by side using home-brew and followed the guidelines presented here:
https://stackoverflow.com/questions/51726203/installing-python3-6-alongside-python3-7-on-mac
setup new virtual env to use python 3.6.5 and a bunch of other modules.

This error occurs in the virtual environment. Both notebooks and command line python code generate the error. The python code runs 100% correctly with no other errors than this message.

python my_py_file.py
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'

I deleted and recreated the venv but the error persists. Likely all the code continues to run without any other errors.

I'm not sure what to do next. I do not like this error message. Any suggestions will be welcome.

jainraje · 2019-02-02T21:04:20Z

FYI, I just resolved this issue by forcing a reinstall of numpy and pandas as follows:

pip install --upgrade --force-reinstall numpy==1.14.5
pip install --upgrade --force-reinstall pandas==0.22.0

No more error message.

wishvivek · 2019-02-04T02:40:10Z

Inside a new conda virtual environment,

Solved it by using pip install numpy==1.16
Was using conda install numpy before that. The conda install option was throwing the same issue.

TshepoMK · 2019-02-25T07:59:04Z

Inside a new conda virtual environment,

Solved it by using pip install numpy==1.16

Was using conda install numpy before that. The conda install option was throwing the same issue.

Thanks man, I installed numpy 1.16 and it fixed the issue.

Memento1990 · 2019-03-07T02:47:29Z

Inside a new conda virtual environment,

Solved it by using pip install numpy==1.16

Was using conda install numpy before that. The conda install option was throwing the same issue.

Thanks man, it solves the problem.

ttt733 · 2019-03-08T06:06:45Z

I've updated the numpy requirement to 1.16 across our various pylivetrader releases, and we'll try to keep the required numpy version as updated as possible, so this issue should not crop up anymore.

Adarshsng · 2019-03-08T06:15:47Z

upgrade numpy to latest version it solves the problem ^.^

live-wire · 2019-03-08T08:46:51Z

pip install --upgrade numpy

bibinmjose · 2019-03-08T19:48:01Z

@live-wire Problem is most often upgrading numpy will cause broken dependencies in other packages

#73 (comment)

ninofiliu · 2019-04-08T20:46:24Z

@bibinmjose How come? I though that 1.15 -> 1.16 = minor update = no breaking changes

bibinmjose · 2019-04-08T20:52:36Z

@ninofiliu There was some compatibility issue with my tensorflow version and it was not upgrading numpy citing conflicts. Anyways, I have moved on and it's no longer an issue for me.

#73 (comment)

VineetJain22 · 2019-04-17T03:38:31Z

I am facing a similar issue when trying to load a pickled file. Code, error & versions below.
Code:
infile = open('_test_suite.pkl','rb')
new_dict = pickle.load(infile)
infile.close()
Error:
ModuleNotFoundError Traceback (most recent call last)
in ()
1 infile = open('_test_suite.pkl','rb')
----> 2 new_dict = pickle.load(infile)
3 infile.close()

ModuleNotFoundError: No module named 'core'
Version:
Numpy 1.16.2
Pandas 0.24.2
Pickle 4.0

Tried pandas.read_pickle() too. It gives a similar No module named 'core' error.

Any suggestion will be helpful.

Nico reported related issue: alpacahq/pylivetrader#73

AmanOswal · 2019-06-16T05:30:19Z

Had the same issue. Reinstalling numpy fixed it

13540148299 · 2019-07-16T05:25:35Z

Same issue. Upgrading numpy to 1.16 fixed it,thanks

Hedibouchelliga · 2020-04-06T16:24:31Z

for future readors , this how i fixed it :
pip uninstall numpy
then delete the folder with the name numpy
conda install -c anaconda numpy
and that's how it works

zhangleibo · 2020-09-24T13:05:21Z

--- import sys ---
Traceback (most recent call last):
File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\numpy\core_init_.py", line 22, in
from . import multiarray
File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\numpy\core\multiarray.py", line 12, in
from . import overrides
File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\numpy\core\overrides.py", line 7, in
from numpy.core._multiarray_umath import (
ModuleNotFoundError: No module named 'numpy.core._multiarray_umath'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "./Python\func.py", line 5, in
from modSymmetryLanding import modSymmetryLanding
File "./Python\modSymmetryLanding.py", line 6, in
import numpy as np
File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\numpy_init_.py", line 140, in
from . import core
File "C:\Users\lenovo\AppData\Local\Programs\Python\Python36\lib\site-packages\numpy\core_init_.py", line 48, in
raise ImportError(msg)
ImportError:

IMPORTANT: PLEASE READ THIS FOR ADVICE ON HOW TO SOLVE THIS ISSUE!

Importing the numpy C-extensions failed. This error can happen for
many reasons, often due to issues with your setup or how NumPy was
installed.

We have compiled some common reasons and troubleshooting tips at:

https://numpy.org/devdocs/user/troubleshooting-importerror.html

Please note and check the following:

The Python version is: Python3.6 from "D:\worker\LGAS\LandingGearsAnalysisSystem..\bin\Debug\LGAnalysisSystem.exe"
The NumPy version is: "1.19.1"

and make sure that they are the versions you expect.
Please carefully study the documentation linked above for further help.

Original error was: No module named 'numpy.core._multiarray_umath'

2020-09-24 16:07:54:027 [Inf]CInterface::CallPython,Line=166 ******************** Python end ****

schneiderfelipe mentioned this issue Jan 22, 2019

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath' numpy/numpy#12825

Closed

soupault mentioned this issue Feb 8, 2019

Bug: Scikit-image 0.14.1 broken with numpy 1.16 scikit-image/scikit-image#3586

Closed

ttt733 closed this as completed Mar 8, 2019

mauricedoepke mentioned this issue Mar 15, 2019

python -m spacy download en_core_web_md give the below error RasaHQ/rasa#1784

Closed

gar1t pushed a commit to guildai/guildai that referenced this issue May 13, 2019

Require numpy 1.16 or greater

0cf36ac

Nico reported related issue: alpacahq/pylivetrader#73

George3d6 mentioned this issue May 15, 2019

numpy core library failed to import mindsdb/mindsdb#178

Closed

cfregly mentioned this issue May 16, 2019

"No module named 'numpy.core._multiarray_umath" during install tensorflow/tfx#146

Closed

Deninc mentioned this issue Nov 12, 2019

Docker container deployment: No module named 'gunicorn.six' bentoml/BentoML#372

Closed

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ModuleNotFoundError: No module named 'numpy.core._multiarray_umath' #73

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath' #73

ckyleda commented Jan 8, 2019 •

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zhangleibo commented Sep 24, 2020

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath' #73

ModuleNotFoundError: No module named 'numpy.core._multiarray_umath' #73

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