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Setup issue - ValueError: ufunc <ufunc 'positive'> not supported by quantities #174

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cmoriarty opened this issue Jun 19, 2017 · 4 comments
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Setup issue - ValueError: ufunc <ufunc 'positive'> not supported by quantities #174

cmoriarty opened this issue Jun 19, 2017 · 4 comments

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@cmoriarty
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I created a fresh conda python2.7 enviornment, and ran pip install instrumentkit. This worked great, although with the single import statement:

from instruments.thorlabs import APTMotorController

I get the following error:

  File "C:\ProgramData\Anaconda2\envs\kittest\lib\site-packages\quantities\quantity.py", line 236, in __array_prepare__
    """ % uf
ValueError: ufunc <ufunc 'positive'> not supported by quantities
                please file a bug report at https://github.com/python-quantities
@scasagrande
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Hey @cmoriarty ! Thanks for the report. I missed it as I've been working on some data analysis for another project this week.

I haven't tested installation with conda actually. I'll give it a go locally, but for now can you try conda py3.4+ ? Not sure if it will help, but I'm interested to see.

@cmoriarty
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No worries, I never have expectations when I post issues on github, haha. Thanks for replying!

We are limited to python 2.7 because of a device on our system with an SDK that isn't python3 compatible (cough cough Boston Micromachines cough cough). It sounds like you think python 2.7 is the culprit?

Just to clarify, I did use pip (not conda) to install InstrumentKit. I just did it in a conda environment, which is probably irrelevant.

In the end I had to implement my own low-level interface to the d2xx USB driver to control a Thorlabs MFF101 flip motor. I did it with the ftd2xx python wrapper on github. I will be needing to interface with a Thorlabs laser source in the next month or so, I'll check back in then.

@scasagrande
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For clarification, you get the error during the installation process of pip install instrumentkit ? If so, it must be something related to anaconda, because IK currently installs in CI on CPython 2.7 without issue. I'll take a look this weekend.

@scasagrande
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@cmoriarty It looks like this is an issue with the quantities package and the latest numpy>=1.13.0. You can see that here: python-quantities/python-quantities#129

I'd suggest you first manually install numpy==1.12.1 and the install InstrumentKit.

cgranade added a commit that referenced this issue Jul 12, 2017
@cgranade
Locked requirements.txt; see #174.
a897b8c
@cgranade cgranade mentioned this issue Jul 12, 2017
Merged
cgranade added a commit that referenced this issue Jul 12, 2017
@cgranade
Locked requirements.txt; see #174.
f5db0ee
scasagrande pushed a commit that referenced this issue Jul 14, 2017
@cgranade @scasagrande
Feature: named structures (#169)
12e9a15 
* Initial version of named struct class.

* Added tests for new class.

* docs and a pylint fix.

* Py3k fix (filter → list(filter))

* Improvements to string handling.

* Ignored additional carp.

* Provide fixes for build and start using hypothesis

* Locked requirements.txt; see #174.

* Fixed py3k compat issue.

* Fixed negative length checks.

* Fixed bug in StringField.__get__

* Added NamedStruct.__eq__ test.

* Fixing pylint warnings.

* Moved pylint warning comment.

* Changed numpy version in reqs as suggested by @scasagrande
scasagrande pushed a commit that referenced this issue Feb 10, 2019
@cgranade @scasagrande
Improvements to APT (#167)
ca5fb15 
* Added driver/motor tables for T/KDC001 APT devs.

* Moved TODO comment to avoid pylint error.

* Misc Py3k changes for ThorLabs APT

* motion_timeout for APT motor cmds, fix scale factor

* ThorLabsAPT: Example of new config support.

* More pylint fixes

* Fix for line continuation convention.

* Rearranged imports into standard order.

* Added an APT test. Not working yet.

* Fix linting issues

* New handling in loopback for empty terminator.

* struct.Struct for contents of hw_info packets

* Support for specifying expected apt pkt sizes

* Fixes to APT and APT tests

* Missed a conflict marker.

* Fixed bug due to `if size` falling through on size == 0.

* Removed trailing whitespace.

* Locked requirements.txt; see #174.

* Remove numpy version pinning in requirements.txt

* Add tests to cover additional loopback comm behaviour

* Make pylint happy

* Revert changes to size=0 behaviour in loopback comm
scasagrande added a commit that referenced this issue Feb 19, 2019
@scasagrande
Develop -> master for v0.5.0 (#209)
016c957 
* Drop support for Python 3.4 (#200)

* Fix issue #197 (#201)

Where checking if value is in enum will raise value error in Py38

* Improvements to APT (#167)

* Added driver/motor tables for T/KDC001 APT devs.

* Moved TODO comment to avoid pylint error.

* Misc Py3k changes for ThorLabs APT

* motion_timeout for APT motor cmds, fix scale factor

* ThorLabsAPT: Example of new config support.

* More pylint fixes

* Fix for line continuation convention.

* Rearranged imports into standard order.

* Added an APT test. Not working yet.

* Fix linting issues

* New handling in loopback for empty terminator.

* struct.Struct for contents of hw_info packets

* Support for specifying expected apt pkt sizes

* Fixes to APT and APT tests

* Missed a conflict marker.

* Fixed bug due to `if size` falling through on size == 0.

* Removed trailing whitespace.

* Locked requirements.txt; see #174.

* Remove numpy version pinning in requirements.txt

* Add tests to cover additional loopback comm behaviour

* Make pylint happy

* Revert changes to size=0 behaviour in loopback comm

* Fix bug with SCPIFunctionGenerator.function, add tests (#202)

* Fix bug with SCPIFunctionGenerator.function, add tests

* Fix linting

* Fix Agilent 33220a, add tests (#203)

* Function Generator single/multi-channel consistency (#206)

* Function Generator single/multi-channel consistency

* Fix Py27 linting issue

* Fix linting issue

* Add tests for FunctionGenerator abstract instrument

* Adding support for the minghe mhs5200 (#150)

* added mhs5200

* added minghe function generator

* added absolute_import

* fixed scaling on frequency

* switched to abstract instrument class

* fixed a few docstrings

* after testing with device

* Minghe MHS5200 - Add instrument to docs

* isolating changes from cc1 test station:

* Revert "isolating changes from cc1 test station:"

This reverts commit 87b8dec.

* reverting changes and fixing duty cycle

* Update for new FunctionGenerator multichannel consistency update

* Docstring modifications (#207)
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@scasagrande @cmoriarty