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Re: guix import error + New: setting up a jupyterlab environment

From: Zelphir Kaltstahl
Subject: Re: guix import error + New: setting up a jupyterlab environment
Date: Sat, 24 Oct 2020 21:42:13 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 
Hello Efraim!

On 10/21/20 9:18 AM, Efraim Flashner wrote:
> On Mon, Oct 19, 2020 at 11:12:35PM +0200, Zelphir Kaltstahl wrote:
>> Meanwhile I have managed to run the jupyterlab-server tests, as
>> described in more details here:
>> https://github.com/jupyterlab/jupyterlab_server/issues/128
>>
>> Indeed, in version 1.2.0 the tests fail the same way they fail when I
>> try to create my environment. This means the next thing to fix would
>> probably be to use another version of jupyterlab-server. 1.2.0 is a tag
>> in the jupyterlab-server repository, which _seems_ to be the latest
>> "stable" version, before a lot of alpha, beta, and release-candidate
>> versions follow.
>>
>> I guess I could switch the commit in my `jupyterlab.scm` file to point
>> to a different one?
>>
>> I can change the version to `2.0.0rc1`, but I do not know how the
>> checksum is calculated. The checksum is shorter than what I see on
>> simply PyPI:
>>
>> https://files.pythonhosted.org/packages/79/43/5249be5ee741a93f3fa60823caf9a276cadc3103dae16d6e36cc534fefd8/jupyterlab_server-2.0.0rc1.tar.gz#sha256=733b149c5ab8e50ea5f2897c323047257060e7bf2dc0fa88663181427bec605d
>>
>> and base32 should only make it longer, not shorter.
>>
>> Can you explain how to switch a version manually and calculate the
>> checksum to match another version?
> For a tarball like the one at pythonhosted you'd download the file and
> then run 'guix hash the-file'. If you're using a source code repository
> then from the top level of the repo you'd run 'guix hash --exclude-vcs
> --recursive .', or 'guix hash -rx .' for short. The hash layout that
> Guix uses is the sha256 of the tarball base32 encoded, but with a change
> in the letters used.
>
> For python packages you can specify a version number, so in this case
> it'd be 'guix import pypi jupyterlab_server/2.0.0rc1'. Some other
> importers us the '@' symbol to specify version number and I think some
> don't support using other versions at all.
>
> I don't know how compatible different major versions of
> jupyterlab-server are with each other, so I'd stick with 1.2.0 for now.


This means however, that the check phase will fail, because of the
failing tests in the jupyterlab_server repository on version 1.2.0.

Unless there is a way to disable running those specific tests, I guess
this means, that only getting the tests to pass in the jupyterlab_server
repository will solve the problem?


>> Regards,
>> Zelphir
>>
>> On 10/19/20 8:19 PM, Zelphir Kaltstahl wrote:
>>> Hello Efraim,
>>>
>>> Thanks for your patience! It seems with that I am getting quite far
>>> (at least it feels like making progress, or even being close to have a
>>> working environment), up to the "check phase". There some tests
>>> failing in the "check phase". Here is what I am getting now,
>>> regardless of whether I stick ("python-ipykernel" ,python-ipykernel)
>>> in the native inputs or propagated inputs:
>>>
>>> ~~~~START~~~~
>>> running install_egg_info
>>> Copying jupyterlab_server.egg-info to 
>>> /gnu/store/2h44ldpcqqd0q7hqpbcqdavcnbjsibfb-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server-1.2.0-py3.8.egg-info
>>> running install_scripts
>>> phase `install' succeeded after 0.3 seconds
>>> starting phase `wrap'
>>> find-files: 
>>> /gnu/store/2h44ldpcqqd0q7hqpbcqdavcnbjsibfb-python-jupyterlab-server-1.2.0/bin:
>>>  No such file or directory
>>> find-files: 
>>> /gnu/store/2h44ldpcqqd0q7hqpbcqdavcnbjsibfb-python-jupyterlab-server-1.2.0/sbin:
>>>  No such file or directory
>>> phase `wrap' succeeded after 0.0 seconds
>>> starting phase `check'
>>> running "python setup.py" with command "test" and parameters ()
>>> running test
>>> running egg_info
>>> writing jupyterlab_server.egg-info/PKG-INFO
>>> writing dependency_links to jupyterlab_server.egg-info/dependency_links.txt
>>> writing requirements to jupyterlab_server.egg-info/requires.txt
>>> writing top-level names to jupyterlab_server.egg-info/top_level.txt
>>> reading manifest file 'jupyterlab_server.egg-info/SOURCES.txt'
>>> reading manifest template 'MANIFEST.in'
>>> warning: no previously-included files matching '*~' found anywhere in 
>>> distribution
>>> warning: no previously-included files matching '*.pyc' found anywhere in 
>>> distribution
>>> warning: no previously-included files matching '*.pyo' found anywhere in 
>>> distribution
>>> warning: no previously-included files matching '.git' found anywhere in 
>>> distribution
>>> warning: no previously-included files matching '.ipynb_checkpoints' found 
>>> anywhere in distribution
>>> writing manifest file 'jupyterlab_server.egg-info/SOURCES.txt'
>>> running build_ext
>>> test_get (jupyterlab_server.tests.test_settings_api.SettingsAPITest) ... 
>>> ERROR
>>> test_get_bad (jupyterlab_server.tests.test_settings_api.SettingsAPITest) 
>>> ... ERROR
>>> test_listing (jupyterlab_server.tests.test_settings_api.SettingsAPITest) 
>>> ... ERROR
>>> test_patch (jupyterlab_server.tests.test_settings_api.SettingsAPITest) ... 
>>> ERROR
>>> test_patch_bad_data 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest) ... ERROR
>>> test_patch_wrong_id 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest) ... ERROR
>>> test_bad_put 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest) ... ERROR
>>> test_blank_put 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest) ... ERROR
>>> test_delete (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest) 
>>> ... ERROR
>>> test_get (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest) 
>>> ... ERROR
>>> test_listing 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest) ... ERROR
>>> test_put (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest) 
>>> ... ERROR
>>>
>>> ======================================================================
>>> ERROR: test_get (jupyterlab_server.tests.test_settings_api.SettingsAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_settings_api.py",
>>>  line 31, in setUp
>>>     dst = os.path.join(self.lab_config.schemas_dir, '@jupyterlab')
>>> AttributeError: 'SettingsAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_get_bad 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_settings_api.py",
>>>  line 31, in setUp
>>>     dst = os.path.join(self.lab_config.schemas_dir, '@jupyterlab')
>>> AttributeError: 'SettingsAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_listing 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_settings_api.py",
>>>  line 31, in setUp
>>>     dst = os.path.join(self.lab_config.schemas_dir, '@jupyterlab')
>>> AttributeError: 'SettingsAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_patch 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_settings_api.py",
>>>  line 31, in setUp
>>>     dst = os.path.join(self.lab_config.schemas_dir, '@jupyterlab')
>>> AttributeError: 'SettingsAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_patch_bad_data 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_settings_api.py",
>>>  line 31, in setUp
>>>     dst = os.path.join(self.lab_config.schemas_dir, '@jupyterlab')
>>> AttributeError: 'SettingsAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_patch_wrong_id 
>>> (jupyterlab_server.tests.test_settings_api.SettingsAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_settings_api.py",
>>>  line 31, in setUp
>>>     dst = os.path.join(self.lab_config.schemas_dir, '@jupyterlab')
>>> AttributeError: 'SettingsAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_bad_put 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_workspaces_api.py",
>>>  line 34, in setUp
>>>     dst = os.path.join(self.lab_config.workspaces_dir, item)
>>> AttributeError: 'WorkspacesAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_blank_put 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_workspaces_api.py",
>>>  line 34, in setUp
>>>     dst = os.path.join(self.lab_config.workspaces_dir, item)
>>> AttributeError: 'WorkspacesAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_delete 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_workspaces_api.py",
>>>  line 34, in setUp
>>>     dst = os.path.join(self.lab_config.workspaces_dir, item)
>>> AttributeError: 'WorkspacesAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_get 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_workspaces_api.py",
>>>  line 34, in setUp
>>>     dst = os.path.join(self.lab_config.workspaces_dir, item)
>>> AttributeError: 'WorkspacesAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_listing 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_workspaces_api.py",
>>>  line 34, in setUp
>>>     dst = os.path.join(self.lab_config.workspaces_dir, item)
>>> AttributeError: 'WorkspacesAPITest' object has no attribute 'lab_config'
>>>
>>> ======================================================================
>>> ERROR: test_put 
>>> (jupyterlab_server.tests.test_workspaces_api.WorkspacesAPITest)
>>> ----------------------------------------------------------------------
>>> Traceback (most recent call last):
>>>   File 
>>> "/tmp/guix-build-python-jupyterlab-server-1.2.0.drv-0/jupyterlab_server-1.2.0/jupyterlab_server/tests/test_workspaces_api.py",
>>>  line 34, in setUp
>>>     dst = os.path.join(self.lab_config.workspaces_dir, item)
>>> AttributeError: 'WorkspacesAPITest' object has no attribute 'lab_config'
>>>
>>> ----------------------------------------------------------------------
>>> Ran 12 tests in 0.001s
>>>
>>> FAILED (errors=12)
>>> Test failed: <unittest.runner.TextTestResult run=12 errors=12 failures=0>
>>> error: Test failed: <unittest.runner.TextTestResult run=12 errors=12 
>>> failures=0>
>>> command "python" "-c" "import setuptools, 
>>> tokenize;__file__='setup.py';f=getattr(tokenize, 'open', 
>>> open)(__file__);code=f.read().replace('\\r\\n', 
>>> '\\n');f.close();exec(compile(code, __file__, 'exec'))" "test" failed with 
>>> status 1
>>> ~~~~~END~~~~~
>>>
>>> I have some thoughts about this:
>>>
>>> The Python error does not really tell me what is wrong. I don't know
>>> why the `WorkspacesAPITest` does not have an attribute named `lab_config`.
>>>
>>> One can see, that those are all API tests. Since there were problems
>>> in the previous step with network, perhaps it is a network thing here
>>> as well? (Is network, even if localhost for testing, available in the
>>> "check phase"?)
>>>
>>> It could also simply be, that some PyPI package has failing tests. I
>>> don't know how one could then skip such tests.
>>>
>>> I guess I will summarize everything in the end and put it in a
>>> repository as a kind of "guide", so that others can use it or learn
>>> from the process.
>>>
>>> Regards,
>>> Zelphir
>>>
>>> On 10/19/20 6:54 PM, Efraim Flashner wrote:
>>>> It looks like you need to add python-ipykernel to native-inputs.
>>>> Unless it's needed to run the program and not just for the test
>>>> suite, in which case it should go in propagated-inputs. There's no
>>>> network available in the build environment so it can't retrieve
>>>> ipykernel while building.
>>>>
>>>>
>>>> On October 19, 2020 2:31:53 PM UTC, Zelphir Kaltstahl
>>>> <zelphirkaltstahl@posteo.de> wrote:
>>>>
>>>>     Hello Efraim!
>>>>
>>>>     Thank you! Your idea of replacing "-" with "_" seems to partially
>>>>     help:
>>>>
>>>>     The package is downloaded and byte compiled. However, afterwards
>>>>     there is a problem, when it tries to copy the byte-compiled files
>>>>     in the "wrap phase" (comments inserted in some places):
>>>>
>>>>     ~~~~START~~~~
>>>>     ### ... a lot of output before this ...
>>>>
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/__init__.py
>>>>  to __init__.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/_version.py
>>>>  to _version.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/app.py
>>>>  to app.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/handlers.py
>>>>  to handlers.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/listings_handler.py
>>>>  to listings_handler.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/process.py
>>>>  to process.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/process_app.py
>>>>  to process_app.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/server.py
>>>>  to server.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/servertest.py
>>>>  to servertest.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/settings_handler.py
>>>>  to settings_handler.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/themes_handler.py
>>>>  to themes_handler.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/workspaces_handler.py
>>>>  to workspaces_handler.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/tests/__init__.py
>>>>  to __init__.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/tests/test_settings_api.py
>>>>  to test_settings_api.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/tests/test_workspaces_api.py
>>>>  to test_workspaces_api.cpython-38.pyc
>>>>     byte-compiling 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server/tests/utils.py
>>>>  to utils.cpython-38.pyc
>>>>
>>>>     ### ... seems byte-compiling went without problems, but not comes the 
>>>> problem ...
>>>>
>>>>     running install_egg_info
>>>>     Copying jupyterlab_server.egg-info to 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/lib/python3.8/site-packages/jupyterlab_server-1.2.0-py3.8.egg-info
>>>>     running install_scripts
>>>>     phase `install' succeeded after 0.3 seconds
>>>>     starting phase `wrap'
>>>>     find-files: 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/bin:
>>>>  No such file or directory
>>>>     find-files: 
>>>> /gnu/store/yr7q21bws1xgx3p2dy9cfdiknjpsajm6-python-jupyterlab-server-1.2.0/sbin:
>>>>  No such file or directory
>>>>     phase `wrap' succeeded after 0.0 seconds
>>>>     starting phase `check'
>>>>     running "python setup.py" with command "test" and parameters ()
>>>>     running test
>>>>     Searching for ipykernel
>>>>     Reading https://pypi.org/simple/ipykernel/
>>>>     Download error on https://pypi.org/simple/ipykernel/: [Errno -2] Name 
>>>> or service not known -- Some packages may not be found!
>>>>     Couldn't find index page for 'ipykernel' (maybe misspelled?)
>>>>     Scanning index of all packages (this may take a while)
>>>>     Reading https://pypi.org/simple/
>>>>     Download error on https://pypi.org/simple/: [Errno -2] Name or service 
>>>> not known -- Some packages may not be found!
>>>>     No local packages or working download links found for ipykernel
>>>>     error: Could not find suitable distribution for 
>>>> Requirement.parse('ipykernel')
>>>>     command "python" "-c" "import setuptools, 
>>>> tokenize;__file__='setup.py';f=getattr(tokenize, 'open', 
>>>> open)(__file__);code=f.read().replace('\\r\\n', 
>>>> '\\n');f.close();exec(compile(code, __file__, 'exec'))" "test" failed with 
>>>> status 1
>>>>     ~~~~~END~~~~~
>>>>
>>>>     So it seems, that while the download URL is corrected, there is
>>>>     another place, where Guix has an error now, resulting in a final
>>>>     error shown in command line:
>>>>
>>>>     ~~~~START~~~~
>>>>     $ guix time-machine --channels=channels.scm -- environment 
>>>> --manifest=manifest.scm --load=jupyterlab.scm
>>>>     Updating channel 'guix' from Git repository at 
>>>> 'https://git.savannah.gnu.org/git/guix.git'...
>>>>     substitute: updating substitutes from 'https://ci.guix.gnu.org'... 
>>>> 100.0%
>>>>     The following derivations will be built:
>>>>        
>>>> /gnu/store/wzmfn9m45bmsbrx094rv3lf3w0rpmw49-python-pytest-check-links-0.3.0.drv
>>>>        
>>>> /gnu/store/96xf5mrg134mcsp01b0m1qs1lxkb401a-python-jupyterlab-server-1.2.0.drv
>>>>        
>>>> /gnu/store/32a28hd7aainwn0hfsnf3blh8prmfz61-jupyterlab_server-1.2.0.tar.gz.drv
>>>>
>>>>     3,9 MB will be downloaded
>>>>     downloading from 
>>>> https://ci.guix.gnu.org/nar/lzip/54kpl9psx16jwic4gpnjwh44kim04wlk-python-notebook-5.7.4
>>>>  ...
>>>>      python-notebook-5.7.4  3.7MiB                                         
>>>>                                                                            
>>>>                                                                            
>>>>          5.1MiB/s 00:01 [##################] 100.0%
>>>>
>>>>     building 
>>>> /gnu/store/32a28hd7aainwn0hfsnf3blh8prmfz61-jupyterlab_server-1.2.0.tar.gz.drv...
>>>>     downloading from 
>>>> https://files.pythonhosted.org/packages/source/j/jupyterlab_server/jupyterlab_server-1.2.0.tar.gz
>>>>  ...
>>>>     building 
>>>> /gnu/store/wzmfn9m45bmsbrx094rv3lf3w0rpmw49-python-pytest-check-links-0.3.0.drv...
>>>>     building 
>>>> /gnu/store/96xf5mrg134mcsp01b0m1qs1lxkb401a-python-jupyterlab-server-1.2.0.drv...
>>>>     \ 'check' phasebuilder for 
>>>> `/gnu/store/96xf5mrg134mcsp01b0m1qs1lxkb401a-python-jupyterlab-server-1.2.0.drv'
>>>>  failed with exit code 1
>>>>     build of 
>>>> /gnu/store/96xf5mrg134mcsp01b0m1qs1lxkb401a-python-jupyterlab-server-1.2.0.drv
>>>>  failed
>>>>     View build log at 
>>>> '/var/log/guix/drvs/96/xf5mrg134mcsp01b0m1qs1lxkb401a-python-jupyterlab-server-1.2.0.drv.bz2'.
>>>>     guix environment: error: build of 
>>>> `/gnu/store/96xf5mrg134mcsp01b0m1qs1lxkb401a-python-jupyterlab-server-1.2.0.drv'
>>>>  failed
>>>>     ~~~~~END~~~~~
>>>>
>>>>     Apparently ipykernel is not found, but when I visit
>>>>     https://pypi.org/simple/ipykernel/, I see packages there.
>>>>
>>>>     From the logs:
>>>>
>>>>     ~~~~START~~~~
>>>>     Download error on https://pypi.org/simple/ipykernel/: [Errno -2] Name 
>>>> or service not known -- Some packages may not be found!
>>>>     Couldn't find index page for 'ipykernel' (maybe misspelled?)
>>>>     ~~~~~END~~~~~
>>>>
>>>>     Do I need to add another input in my `jupyterlab.scm`? (How?) Or
>>>>     perhaps I need to create a separate `ipykernel.scm` which
>>>>     contains the output of `guix import pypi --recursive ipykernel`?
>>>>
>>>>     However, it somehow seems to fail for PyPI simple in general
>>>>     (from the logs again):
>>>>
>>>>     ~~~~START~~~~
>>>>     Reading https://pypi.org/simple/
>>>>     Download error on https://pypi.org/simple/: [Errno -2] Name or service 
>>>> not known -- Some packages may not be found!
>>>>     No local packages or working download links found for ipykernel
>>>>     error: Could not find suitable distribution for 
>>>> Requirement.parse('ipykernel')
>>>>     command "python" "-c" "import setuptools, 
>>>> tokenize;__file__='setup.py';f=getattr(tokenize, 'open', 
>>>> open)(__file__);code=f.read().replace('\\r\\n', 
>>>> '\\n');f.close();exec(compile(code, __file__, 'exec'))" "test" failed with 
>>>> status 1
>>>>     ~~~~~END~~~~~
>>>>
>>>>     Thanks,
>>>>     Zelphir
>>>>
>>>>
>>>>     On 10/18/20 6:35 PM, Efraim Flashner wrote:
>>>>>     On Sun, Oct 18, 2020 at 01:55:49PM +0200, Zelphir Kaltstahl wrote:
>>>>>>     Hello Guix Users, hello Zimoun and Tobias!
>>>>>>
>>>>>>     Thanks for your information regarding the importer syntax thing.
>>>>>>
>>>>>>     I continued trying to get a jupyterlab environment today.
>>>>>>
>>>>>>     Here is what I did so far:
>>>>>>
>>>>>>     (1) Create my manifest file:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     (specifications->manifest
>>>>>>      '("python"))
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     (2) Create my channels file:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     $ guix describe --format=channels > channels.scm
>>>>>>     $ cat channels.scm
>>>>>>     (list (channel
>>>>>>             (name 'guix)
>>>>>>             (url "https://git.savannah.gnu.org/git/guix.git";)
>>>>>>             (commit
>>>>>>               "6ca673b30dac281ba27a8dac242c0ac83e5e354b")
>>>>>>             (introduction
>>>>>>               (make-channel-introduction
>>>>>>                 "9edb3f66fd807b096b48283debdcddccfea34bad"
>>>>>>                 (openpgp-fingerprint
>>>>>>                   "BBB0 2DDF 2CEA F6A8 0D1D  E643 A2A0 6DF2 A33A 
>>>>>> 54FA")))))
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     (3) Create my jupyterlab PyPI import file, this time around using the
>>>>>>     "/" instead of "@" for specifying the version:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     $ guix import pypi --recursive jupyterlab/2.1.5 > jupyterlab.scm
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     (4) Add missing import expressions and add output expression at the 
>>>>>> end:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     ;; add module imports
>>>>>>     (use-modules
>>>>>>      (guix packages)
>>>>>>      (guix download)
>>>>>>      (guix build-system python)
>>>>>>      ((guix licenses) #:prefix license:)
>>>>>>      ;; use `guix environment --ad-hoc python-jinja2 -- guix package -A 
>>>>>> python-jinja2` to find the location of python-jinja2, which is 
>>>>>> gnu/packages/python-xyz.scm
>>>>>     This can be just 'guix package -A python-jinja2', no need for the
>>>>>     environment.
>>>>>
>>>>>>      (gnu packages python-xyz)
>>>>>>      ;; for python-tornado
>>>>>>      (gnu packages python-web)
>>>>>>      ;; for python-pytest
>>>>>>      (gnu packages check))
>>>>>>
>>>>>>     ;; QUESTION: Why are those required packages not imported by guix 
>>>>>> automatically?
>>>>>>     ;; QUESTION: Why are the manually imported packages not actually in 
>>>>>> files with their own name, but instead jinja2 -> python-xyz, tornado -> 
>>>>>> python-web, and pytest -> check?
>>>>>>     ;; QUESTION: Is my process of finding the files in which the 
>>>>>> packages are correct or just working by chance?
>>>>>>
>>>>>>     (define-public python-jupyterlab-server
>>>>>>       (package
>>>>>>         (name "python-jupyterlab-server")
>>>>>>         (version "1.2.0")
>>>>>>         (source
>>>>>>           (origin
>>>>>>             (method url-fetch)
>>>>>>             (uri (pypi-uri "jupyterlab-server" version))
>>>>>>             (sha256
>>>>>>               (base32
>>>>>>                 
>>>>>> "132xby7531rbrjg9bqvsx86birr1blynjxy8gi5kcnb6x7fxjcal"))))
>>>>>>         (build-system python-build-system)
>>>>>>         (propagated-inputs
>>>>>>           `(("python-jinja2" ,python-jinja2)
>>>>>>             ("python-json5" ,python-json5)
>>>>>>             ("python-jsonschema" ,python-jsonschema)
>>>>>>             ("python-notebook" ,python-notebook)
>>>>>>             ("python-requests" ,python-requests)))
>>>>>>         (native-inputs
>>>>>>           `(("python-pytest" ,python-pytest)
>>>>>>             ("python-requests" ,python-requests)))
>>>>>>         (home-page "https://jupyter.org";)
>>>>>>         (synopsis "JupyterLab Server")
>>>>>>         (description "JupyterLab Server")
>>>>>>         (license license:bsd-3)))
>>>>>>
>>>>>>     (define-public python-jupyterlab
>>>>>>       (package
>>>>>>         (name "python-jupyterlab")
>>>>>>         (version "2.1.5")
>>>>>>         (source
>>>>>>           (origin
>>>>>>             (method url-fetch)
>>>>>>             (uri (pypi-uri "jupyterlab" version))
>>>>>>             (sha256
>>>>>>               (base32
>>>>>>                 
>>>>>> "162jn51cg36fsn4l2zhnb5n4nbkhm9wlv974ggcnmdij3i4r4yya"))))
>>>>>>         (build-system python-build-system)
>>>>>>         (propagated-inputs
>>>>>>           `(("python-jinja2" ,python-jinja2)
>>>>>>             ("python-jupyterlab-server"
>>>>>>              ,python-jupyterlab-server)
>>>>>>             ("python-notebook" ,python-notebook)
>>>>>>             ("python-tornado" ,python-tornado)))
>>>>>>         (native-inputs
>>>>>>           `(("python-pytest" ,python-pytest)
>>>>>>             ("python-pytest-check-links"
>>>>>>              ,python-pytest-check-links)
>>>>>>             ("python-requests" ,python-requests)
>>>>>>             ("python-virtualenv" ,python-virtualenv)
>>>>>>             ("python-wheel" ,python-wheel)))
>>>>>>         (home-page "http://jupyter.org";)
>>>>>>         (synopsis
>>>>>>           "The JupyterLab notebook server extension.")
>>>>>>         (description
>>>>>>           "The JupyterLab notebook server extension.")
>>>>>>         (license license:bsd-3)))
>>>>>>
>>>>>>     python-jupyterlab
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     And as noted in the comments, I have 3 questions at this point:
>>>>>>
>>>>>>     (Q1) Why are those required packages not imported by guix 
>>>>>> automatically?
>>>>>>     (My guess: This functionality simply has not yet been implemented.)
>>>>>>
>>>>>>     (Q2) Why are the manually imported packages not actually in files 
>>>>>> with
>>>>>>     their own name, but instead jinja2 -> python-xyt, tornado -> 
>>>>>> python-web,
>>>>>>     and pytest -> check? Why not (gnu packages python pytest) for 
>>>>>> example?
>>>>>>
>>>>>>     (Q3) Is my process of finding the files in which the packages are
>>>>>>     correct or just working by chance? Basically I am creating temporary
>>>>>>     environments, in which I then lookup "where would the package be
>>>>>>     installed" and then exit the temporary environment to use that
>>>>>>     information in my imported package file's import expressions /
>>>>>>     use-modules expression. This seems to be a bit of a convoluted 
>>>>>> process,
>>>>>>     though worth it, if it always works in the end.
>>>>>>
>>>>>>     (4) Now I run my time-machine command:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     $ guix time-machine --channels=channels.scm -- environment 
>>>>>> --manifest=manifest.scm --load=jupyterlab.scm
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     This take a moment and then I get an error (the full output is 
>>>>>> longer,
>>>>>>     but when running it multiple times, already successful steps are not 
>>>>>> all
>>>>>>     done repeatedly, so the output is then reduced to what fails):
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     $ guix time-machine --channels=channels.scm -- environment 
>>>>>> --manifest=manifest.scm --load=jupyterlab.scm
>>>>>>     Updating channel 'guix' from Git repository at 
>>>>>> 'https://git.savannah.gnu.org/git/guix.git'...
>>>>>>     The following derivations will be built:
>>>>>>        
>>>>>> /gnu/store/wzmfn9m45bmsbrx094rv3lf3w0rpmw49-python-pytest-check-links-0.3.0.drv
>>>>>>        
>>>>>> /gnu/store/n9i421lrbwrr8d0947w5vma7rhy3iyba-python-jupyterlab-server-1.2.0.drv
>>>>>>        
>>>>>> /gnu/store/s7jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv
>>>>>>
>>>>>>     4,2 MB will be downloaded
>>>>>>     downloading from 
>>>>>> https://ci.guix.gnu.org/nar/lzip/2nahbs5v8q073gjmy224gk0h5lsh1kkw-python-nbconvert-5.0.0b1
>>>>>>  ...
>>>>>>      python-nbconvert-5.0.0b1  301KiB                                    
>>>>>>                                                                          
>>>>>>                                                                          
>>>>>>                2.0MiB/s 00:00 [##################] 100.0%
>>>>>>
>>>>>>     building 
>>>>>> /gnu/store/s7jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv...
>>>>>>     |builder for 
>>>>>> `/gnu/store/s7jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv'
>>>>>>  failed to produce output path 
>>>>>> `/gnu/store/92md7gh966n4fzj6al267lqq4xjx0ncf-jupyterlab-server-1.2.0.tar.gz'
>>>>>>     build of 
>>>>>> /gnu/store/s7jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv
>>>>>>  failed
>>>>>>     View build log at 
>>>>>> '/var/log/guix/drvs/s7/jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv.bz2'.
>>>>>>     cannot build derivation 
>>>>>> `/gnu/store/n9i421lrbwrr8d0947w5vma7rhy3iyba-python-jupyterlab-server-1.2.0.drv':
>>>>>>  1 dependencies couldn't be built
>>>>>>     killing process 7384
>>>>>>     guix environment: error: build of 
>>>>>> `/gnu/store/n9i421lrbwrr8d0947w5vma7rhy3iyba-python-jupyterlab-server-1.2.0.drv'
>>>>>>  failed
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     OK, an error, perhaps I can understand it. Lets look at that log 
>>>>>> file:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     $ cp 
>>>>>> /var/log/guix/drvs/s7/jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv.bz2
>>>>>>  .
>>>>>>     $ bzip2 --decompress 
>>>>>> jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv.bz2
>>>>>>     $ cat 
>>>>>> jc2dbb0bnrahxklmszmpfv8klgw3sd-jupyterlab-server-1.2.0.tar.gz.drv
>>>>>>
>>>>>>     Starting download of 
>>>>>> /gnu/store/92md7gh966n4fzj6al267lqq4xjx0ncf-jupyterlab-server-1.2.0.tar.gz
>>>>>>     From 
>>>>>> https://files.pythonhosted.org/packages/source/j/jupyterlab-server/jupyterlab-server-1.2.0.tar.gz...
>>>>>>     download failed 
>>>>>> "https://files.pythonhosted.org/packages/source/j/jupyterlab-server/jupyterlab-server-1.2.0.tar.gz";
>>>>>>  404 "Not Found"
>>>>>>
>>>>>>     Starting download of 
>>>>>> /gnu/store/92md7gh966n4fzj6al267lqq4xjx0ncf-jupyterlab-server-1.2.0.tar.gz
>>>>>>     From 
>>>>>> https://ci.guix.gnu.org/file/jupyterlab-server-1.2.0.tar.gz/sha256/132xby7531rbrjg9bqvsx86birr1blynjxy8gi5kcnb6x7fxjcal...
>>>>>>     download failed 
>>>>>> "https://ci.guix.gnu.org/file/jupyterlab-server-1.2.0.tar.gz/sha256/132xby7531rbrjg9bqvsx86birr1blynjxy8gi5kcnb6x7fxjcal";
>>>>>>  404 "Not Found"
>>>>>>
>>>>>>     Starting download of 
>>>>>> /gnu/store/92md7gh966n4fzj6al267lqq4xjx0ncf-jupyterlab-server-1.2.0.tar.gz
>>>>>>     From 
>>>>>> https://tarballs.nixos.org/sha256/132xby7531rbrjg9bqvsx86birr1blynjxy8gi5kcnb6x7fxjcal...
>>>>>>     download failed 
>>>>>> "https://tarballs.nixos.org/sha256/132xby7531rbrjg9bqvsx86birr1blynjxy8gi5kcnb6x7fxjcal";
>>>>>>  404 "Not Found"
>>>>>>
>>>>>>     Starting download of 
>>>>>> /gnu/store/92md7gh966n4fzj6al267lqq4xjx0ncf-jupyterlab-server-1.2.0.tar.gz
>>>>>>     From 
>>>>>> https://archive.softwareheritage.org/api/1/content/sha256:5431d9dde96659364b7cc877693d5d21e7b80cea7ae3959ecc2b87518e5f5d8c/raw/...
>>>>>>     download failed 
>>>>>> "https://archive.softwareheritage.org/api/1/content/sha256:5431d9dde96659364b7cc877693d5d21e7b80cea7ae3959ecc2b87518e5f5d8c/raw/";
>>>>>>  404 "Not Found"
>>>>>>     failed to download 
>>>>>> "/gnu/store/92md7gh966n4fzj6al267lqq4xjx0ncf-jupyterlab-server-1.2.0.tar.gz"
>>>>>>  from 
>>>>>> "https://files.pythonhosted.org/packages/source/j/jupyterlab-server/jupyterlab-server-1.2.0.tar.gz";
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     So it seems, that the jupyterlab-server file is simply not 
>>>>>> downloadable
>>>>>>     any longer!
>>>>>>
>>>>>>     Trying using wget:
>>>>>>
>>>>>>     ~~~~START~~~~
>>>>>>     $ wget 
>>>>>> https://files.pythonhosted.org/packages/source/j/jupyterlab-server/jupyterlab-server-1.2.0.tar.gz
>>>>>>     --2020-10-18 13:49:52--  
>>>>>> https://files.pythonhosted.org/packages/source/j/jupyterlab-server/jupyterlab-server-1.2.0.tar.gz
>>>>>>     Resolving files.pythonhosted.org (files.pythonhosted.org)... 
>>>>>> 2a04:4e42:9::319, 151.101.37.63
>>>>>>     Connecting to files.pythonhosted.org 
>>>>>> (files.pythonhosted.org)|2a04:4e42:9::319|:443... failed: Connection 
>>>>>> refused.
>>>>>>     Connecting to files.pythonhosted.org 
>>>>>> (files.pythonhosted.org)|151.101.37.63|:443... connected.
>>>>>>     HTTP request sent, awaiting response... 404 Not Found
>>>>>>     2020-10-18 13:49:53 ERROR 404: Not Found.
>>>>>>     ~~~~~END~~~~~
>>>>>>
>>>>>>     So now I am out of ideas. It seems the file is not available any 
>>>>>> longer
>>>>>>     and the definition of jupyterlab needs to be updated somewhere, so 
>>>>>> that
>>>>>>     it does not try to download an old or non-existent version of
>>>>>>     jupyter-labserver. But how is this usually done? Can I specify it
>>>>>>     somewhere in one of the 3 files I have, or am I dependent on someone
>>>>>>     fixing the jupyterlab-server dependency / input for juypterlab?
>>>>>>
>>>>>>     Thanks for your help so far! Tell me, if I need to provide any more
>>>>>>     information to solve the problem.
>>>>>     Try chaning the URL line to (uri (pypi-uri "jupyterlab_server" 
>>>>> version)),
>>>>>     with an underscore (_). I don't have any special suggestions for 
>>>>> knowing
>>>>>     that it should be an underscore instead of a dash. The best I have is
>>>>>     the output from 'guix import pypi jupyterlab-server:
>>>>>
>>>>>     (ins)efraim@E5400 ~$ guix import pypi jupyterlab-server
>>>>>
>>>>>     Starting download of /tmp/guix-file.ayJ41F
>>>>>     From 
>>>>> https://files.pythonhosted.org/packages/92/54/5f321ca4cebfb644ac59eb21601b46a2ff9831ffe1b4e5a588f2a7e98d48/jupyterlab_server-1.2.0.tar.gz...
>>>>>      …er-1.2.0.tar.gz  22KiB               57KiB/s 00:00 
>>>>> [##################] 100.0%
>>>>>
>>>>>
>>>>>
>>>>>>     Best regards,
>>>>>>     Zelphir
>>>>>>
>>>>>>
>>>>>>     On 10/16/20 2:25 PM, Tobias Geerinckx-Rice wrote:
>>>>>>>     Zelphir,
>>>>>>>
>>>>>>>     Zelphir Kaltstahl 写道：
>>>>>>>>     $ guix import pypi 'jupyterlab@2.1.5' --recursive
>>>>>>>     It will work if you substitute ‘/’ for ‘@’.  Yes, this is a happy
>>>>>>>     accident specific to the PyPI importer, and I'm sure you can guess 
>>>>>>> why
>>>>>>>     it happens to work.
>>>>>>>
>>>>>>>>>     guix import hackage mtl@2.1.3.1
>>>>>>>>     But that is in the "hackage" import section. Is the same not 
>>>>>>>> available
>>>>>>>>     for PyPI?
>>>>>>>     [...]
>>>>>>>
>>>>>>>>     Do the various importers work differently?
>>>>>>>     Unfortunately so.  It would be great(TM) if PACKAGE[@VERSION] were
>>>>>>>     standard.  Each importer could handle it properly (e.g., by turning 
>>>>>>> it
>>>>>>>     into "/") or return a friendlier ‘the foo importer does not yet
>>>>>>>     support versions’ error.
>>>>>>>
>>>>>>>     I don't have the time, but this sounds like a good 
>>>>>>> intermediate-level
>>>>>>>     hack for someone who does :-)
>>>>>>>
>>>>>>>     Kind regards,
>>>>>>>
>>>>>>>     T G-R
>>>>>>     -- 
>>>>>>     repositories: https://notabug.org/ZelphirKaltstahl
>>>>     -- 
>>>>     repositories: https://notabug.org/ZelphirKaltstahl
>>>> -- 
>>>> Sent from my Android device with K-9 Mail. Please excuse my brevity. 
>>> -- 
>>> repositories: https://notabug.org/ZelphirKaltstahl
>> -- 
>> repositories: https://notabug.org/ZelphirKaltstahl
Regards,
Zelphir

-- 
repositories: https://notabug.org/ZelphirKaltstahl
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