nrfutil ModuleNotFoundError: No module named 'constants'

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Vidar Berg — Wed, 05 Feb 2025 14:47:42 GMT

nRF Util version >= 7 doesn't have any python dependencies.

RE: nrfutil ModuleNotFoundError: No module named 'constants'

PGenius — Wed, 05 Feb 2025 14:34:23 GMT

https://www.nordicsemi.com/Products/Development-tools/nRF-Util/Download.

Is the nRF util works from the official nordic website works fine ? is it updated to work with newer python?

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Vidar Berg — Fri, 20 May 2022 10:03:46 GMT

Thanks for the update and feedback (which I agree with - most users will use the scripts as is anyway). We plan to change the way it is installed in the next release.

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Marco — Fri, 20 May 2022 09:59:53 GMT

Yes, that worked fine, thanks you.

In my humble opinion, pre-built executables are a better choice as they don't require fiddling with Python (installing it, configuring PATH, etc). Perhaps you should update the instructions in Nordic Semiconductor Infocenter ?

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Vidar Berg — Fri, 20 May 2022 09:51:22 GMT

Hi, nrfutil requires additional updates to work with Python 3.10. Are you able to work with the pre-built executable for now? The executable are available on the release page here: https://github.com/NordicSemiconductor/pc-nrfutil/releases.

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Marco — Fri, 20 May 2022 09:46:56 GMT

Vidar Berg nrfutil is still broken with Python 3.10:

ModuleNotFoundError: No module named 'constants'

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Marcel — Mon, 26 Jul 2021 19:00:49 GMT

We have been installing several new machines recently and all of them are now using Python3.8 as 3.9 still does not work as per my comment devzone.nordicsemi.com/.../320752

This is valid for Windows 10 only though as all is working dandy on Mac over here.

RE: nrfutil ModuleNotFoundError: No module named 'constants'

jasonrogers — Mon, 26 Jul 2021 17:07:29 GMT

Any update to this? Still getting this error today.

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Marcel — Mon, 19 Jul 2021 14:51:19 GMT

As of Python 3.9.6 on Win 10 and nrfutil 5.2.0 this still seems to be an issue

C:\Users\CAD>nrfutil
Traceback (most recent call last):
  File "C:\Users\CAD\AppData\Local\Programs\Python\Python39\Scripts\nrfutil-script.py", line 33, in <module>
    sys.exit(load_entry_point('nrfutil==5.2.0', 'console_scripts', 'nrfutil')())
  File "C:\Users\CAD\AppData\Local\Programs\Python\Python39\Scripts\nrfutil-script.py", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "c:\users\cad\appdata\local\programs\python\python39\lib\importlib\metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "c:\users\cad\appdata\local\programs\python\python39\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\__main__.py", line 53, in <module>
    from nordicsemi.dfu.dfu_transport_serial import DfuTransportSerial
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 52, in <module>
    from nordicsemi.lister.device_lister import DeviceLister
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\lister\device_lister.py", line 39, in <module>
    from nordicsemi.lister.windows.lister_win32 import Win32Lister
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\lister\windows\lister_win32.py", line 43, in <module>
    from constants import DIGCF_PRESENT, DEVPKEY, DIGCF_DEVICEINTERFACE
ModuleNotFoundError: No module named 'constants'

C:\Users\CAD>pip install constants
Collecting constants
  Downloading constants-0.6.0.tar.gz (5.1 kB)
Using legacy 'setup.py install' for constants, since package 'wheel' is not installed.
Installing collected packages: constants
    Running setup.py install for constants ... done
Successfully installed constants-0.6.0

C:\Users\CAD>nrfutil
Traceback (most recent call last):
  File "C:\Users\CAD\AppData\Local\Programs\Python\Python39\Scripts\nrfutil-script.py", line 33, in <module>
    sys.exit(load_entry_point('nrfutil==5.2.0', 'console_scripts', 'nrfutil')())
  File "C:\Users\CAD\AppData\Local\Programs\Python\Python39\Scripts\nrfutil-script.py", line 25, in importlib_load_entry_point
    return next(matches).load()
  File "c:\users\cad\appdata\local\programs\python\python39\lib\importlib\metadata.py", line 77, in load
    module = import_module(match.group('module'))
  File "c:\users\cad\appdata\local\programs\python\python39\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
  File "<frozen importlib._bootstrap>", line 986, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 680, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 850, in exec_module
  File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\__main__.py", line 53, in <module>
    from nordicsemi.dfu.dfu_transport_serial import DfuTransportSerial
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 52, in <module>
    from nordicsemi.lister.device_lister import DeviceLister
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\lister\device_lister.py", line 39, in <module>
    from nordicsemi.lister.windows.lister_win32 import Win32Lister
  File "c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\nordicsemi\lister\windows\lister_win32.py", line 43, in <module>
    from constants import DIGCF_PRESENT, DEVPKEY, DIGCF_DEVICEINTERFACE
ImportError: cannot import name 'DIGCF_PRESENT' from 'constants' (c:\users\cad\appdata\local\programs\python\python39\lib\site-packages\constants.py)

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Vidar Berg — Tue, 16 Feb 2021 10:46:44 GMT

I am not sure if v3.8.7 has been tested. Is it an option to use the pre-buildt executables here: https://github.com/NordicSemiconductor/pc-nrfutil/releases ?

RE: nrfutil ModuleNotFoundError: No module named 'constants'

SmallerPond — Sun, 14 Feb 2021 16:13:40 GMT

Hmm, I have a fresh install with 3.8.7 and I see the same error:

ImportError: cannot import name 'DIGCF_PRESENT' from 'constants' (c:\users\someone\appdata\local\programs\python\python38\lib\site-packages\constants.py)

This is a bummer since I need to test secure DFU for a client.

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Bjorn191023 — Tue, 22 Dec 2020 14:01:00 GMT

Thanks Vidar, great that you have a fix in your plans :-)

Merry XMAS!

BR / Björn

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Vidar Berg — Tue, 22 Dec 2020 13:59:01 GMT

Hi,

Yes, it is unfortunate. The current nrfutil release was made before Python 3.9, hence not included in our release tests. I have already reported this to the team, so it should get fixed in the next version.

Best regards,

Vidar

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Bjorn191023 — Tue, 22 Dec 2020 13:51:46 GMT

Hi A Wagner,

Today I installed Python and nrfutil on a new computer. I installed Python 3.9.1 and then nrfutil through pip. I had the same issue as originally reported here, so it seems nrfutil does not work with Python 3.9.x. I downgraded Python to 3.7 and then nrfutil worked again.

Nordic should fix this issue, very irritating when you download something from scratch that crashes first thing :-(

BR / Björn

RE: nrfutil ModuleNotFoundError: No module named 'constants'

AWagner — Sun, 25 Oct 2020 09:07:32 GMT

Fixed by downgrading to Python 3.8.6 and pip 20.1.1

RE: nrfutil ModuleNotFoundError: No module named 'constants'

AWagner — Sat, 24 Oct 2020 14:48:04 GMT

Helllo Bjorn,

i have the exact same issue as you had. But in my case your solution does not work. I cant get nrfutil to function properly.

ImportError: cannot import name 'DIGCF_PRESENT' from 'constants' (c:\python37\lib\site-packages\constants.py)

This error does still appear.

Please help.

Python 3.9.0

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Bjorn191023 — Mon, 14 Sep 2020 10:23:29 GMT

Final update:

1) I uninstalled components (it has nothing to do with nrfutil):

pip uninstall components

2) I uninstalled nrfutil:

pip uninstall components

3) I installed latest version of nrfutil:

pip install nrfutil

Now it works. Case closed!

BR / Björn

RE: nrfutil ModuleNotFoundError: No module named 'constants'

Bjorn191023 — Mon, 14 Sep 2020 08:52:23 GMT

An update:

I installed the module called constants, but now I get another error:

C:\Users\00315055>pip install constants
Collecting constants
Downloading files.pythonhosted.org/.../constants-0.6.0.tar.gz
Building wheels for collected packages: constants
Building wheel for constants (setup.py) ... done
Stored in directory: C:\Users\00315055\AppData\Local\pip\Cache\wheels\75\a1\25\7e051dae7d8fb9db1c04b0fe309a8bea40111080d3b62f1ca9
Successfully built constants
Installing collected packages: constants
Successfully installed constants-0.6.0
You are using pip version 19.0.3, however version 20.2.3 is available.
You should consider upgrading via the 'python -m pip install --upgrade pip' command.

C:\Users\00315055>nrfutil --help
Traceback (most recent call last):
File "c:\python37\lib\runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "c:\python37\lib\runpy.py", line 85, in _run_code
exec(code, run_globals)
File "C:\Python37\Scripts\nrfutil.exe\__main__.py", line 5, in <module>
File "c:\python37\lib\site-packages\nordicsemi\__main__.py", line 53, in <module>
from nordicsemi.dfu.dfu_transport_serial import DfuTransportSerial
File "c:\python37\lib\site-packages\nordicsemi\dfu\dfu_transport_serial.py", line 52, in <module>
from nordicsemi.lister.device_lister import DeviceLister
File "c:\python37\lib\site-packages\nordicsemi\lister\device_lister.py", line 39, in <module>
from nordicsemi.lister.windows.lister_win32 import Win32Lister
File "c:\python37\lib\site-packages\nordicsemi\lister\windows\lister_win32.py", line 43, in <module>
from constants import DIGCF_PRESENT, DEVPKEY, DIGCF_DEVICEINTERFACE
ImportError: cannot import name 'DIGCF_PRESENT' from 'constants' (c:\python37\lib\site-packages\constants.py)

So now it finds the module, but not the name 'DIGCF_PRESENT' in the module.

Please advise!