Fetch PDB fails in Python 3.11 ChimeraX

[goddard@…]

The following bug report has been submitted:
Platform:        macOS-13.1-arm64-arm-64bit
ChimeraX Version: 1.6.dev202302110040 (2023-02-11 00:40:33 UTC)
Description
Python 3.11 version of ChimeraX.  Error fetching PDB file.

Log:
You can double click a model's Name or ID in the model panel to edit those
fields  
UCSF ChimeraX version: 1.6.dev202302110040 (2023-02-11)  
© 2016-2023 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open 1080 format ccp4 fromDatabase emdb

Opened emdb 1080 as #1, grid size 100,100,100, pixel 2.7, shown at level 1.68,
step 1, values float32  

> close

> open 7j7a

Fetching url http://files.rcsb.org/download/7j7a.cif failed:  
HTTP Error 404: Not Found  

> open 7y7a

Summary of feedback from opening 7y7a fetched from pdb  
---  
note | Fetching compressed mmCIF 7y7a from
http://files.rcsb.org/download/7y7a.cif  
  
Traceback (most recent call last):  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/cmd_line/tool.py", line 319, in execute  
cmd.run(cmd_text)  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/commands/cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 119, in cmd_open  
models = Command(session, registry=registry).run(provider_cmd_text,
log=log)[0]  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/commands/cli.py", line 2897, in run  
result = ci.function(session, **kw_args)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 154, in provider_open  
models, status = collated_open(session, database_name, ident,  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 464, in collated_open  
return remember_data_format()  
^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/open_command/cmd.py", line 435, in remember_data_format  
models, status = func(*func_args, **func_kw)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/mmcif/__init__.py", line 97, in fetch  
return fetcher(session, ident, ignore_cache=ignore_cache, **kw)  
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "src/mmcif.pyx", line 395, in chimerax.mmcif.mmcif.fetch_mmcif  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/fetch.py", line 88, in fetch_file  
retrieve_url(url, filename, uncompress=uncompress,
transmit_compressed=transmit_compressed,  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/fetch.py", line 197, in retrieve_url  
last_modified = _convert_to_timestamp(d)  
^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/site-
packages/chimerax/core/fetch.py", line 348, in _convert_to_timestamp  
return parsedate_to_datetime(date).timestamp()  
^^^^^^^^^^^^^^^^^^^^^^^^^^^  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/email/utils.py",
line 200, in parsedate_to_datetime  
raise ValueError('Invalid date value or format "%s"' % str(data))  
ValueError: Invalid date value or format "None"  
  
ValueError: Invalid date value or format "None"  
  
File "/Users/goddard/ucsf/chimerax-
python311/ChimeraX.app/Contents/Library/Frameworks/Python.framework/Versions/3.11/lib/python3.11/email/utils.py",
line 200, in parsedate_to_datetime  
raise ValueError('Invalid date value or format "%s"' % str(data))  
  
See log for complete Python traceback.  
  




OpenGL version: 4.1 Metal - 83
OpenGL renderer: Apple M1 Max
OpenGL vendor: Apple

Python: 3.11.2
Locale: en_US.UTF-8
Qt version: PyQt6 6.4.2, Qt 6.4.2
Qt runtime version: 6.4.2
Qt platform: cocoa
Hardware:

    Hardware Overview:

      Model Name: MacBook Pro
      Model Identifier: MacBookPro18,2
      Model Number: MK1H3LL/A
      Chip: Apple M1 Max
      Total Number of Cores: 10 (8 performance and 2 efficiency)
      Memory: 32 GB
      System Firmware Version: 8419.60.44
      OS Loader Version: 8419.60.44

Software:

    System Software Overview:

      System Version: macOS 13.1 (22C65)
      Kernel Version: Darwin 22.2.0
      Time since boot: 21 days, 22 hours, 28 minutes

Graphics/Displays:

    Apple M1 Max:

      Chipset Model: Apple M1 Max
      Type: GPU
      Bus: Built-In
      Total Number of Cores: 32
      Vendor: Apple (0x106b)
      Metal Support: Metal 3
      Displays:
        Color LCD:
          Display Type: Built-in Liquid Retina XDR Display
          Resolution: 3456 x 2234 Retina
          Main Display: Yes
          Mirror: Off
          Online: Yes
          Automatically Adjust Brightness: No
          Connection Type: Internal


Installed Packages:
    alabaster: 0.7.13
    appdirs: 1.4.4
    appnope: 0.1.3
    asttokens: 2.2.1
    Babel: 2.11.0
    backcall: 0.2.0
    beautifulsoup4: 4.11.2
    blockdiag: 3.0.0
    blosc2: 2.0.0
    build: 0.10.0
    certifi: 2022.12.7
    cftime: 1.6.2
    charset-normalizer: 3.0.1
    ChimeraX-AddCharge: 1.5.8
    ChimeraX-AddH: 2.2.3
    ChimeraX-AlignmentAlgorithms: 2.0.1
    ChimeraX-AlignmentHdrs: 3.3.1
    ChimeraX-AlignmentMatrices: 2.1
    ChimeraX-Alignments: 2.9
    ChimeraX-AlphaFold: 1.0
    ChimeraX-AltlocExplorer: 1.0.3
    ChimeraX-AmberInfo: 1.0
    ChimeraX-Arrays: 1.1
    ChimeraX-Atomic: 1.43.7
    ChimeraX-AtomicLibrary: 10.0.3
    ChimeraX-AtomSearch: 2.0.1
    ChimeraX-AxesPlanes: 2.3.2
    ChimeraX-BasicActions: 1.1.2
    ChimeraX-BILD: 1.0
    ChimeraX-BlastProtein: 2.1.2
    ChimeraX-BondRot: 2.0.1
    ChimeraX-BugReporter: 1.0.1
    ChimeraX-BuildStructure: 2.8
    ChimeraX-Bumps: 1.0
    ChimeraX-BundleBuilder: 1.2.1
    ChimeraX-ButtonPanel: 1.0.1
    ChimeraX-CageBuilder: 1.0.1
    ChimeraX-CellPack: 1.0
    ChimeraX-Centroids: 1.3.2
    ChimeraX-ChangeChains: 1.0.2
    ChimeraX-CheckWaters: 1.3.1
    ChimeraX-ChemGroup: 2.0.1
    ChimeraX-Clashes: 2.2.4
    ChimeraX-ColorActions: 1.0.3
    ChimeraX-ColorGlobe: 1.0
    ChimeraX-ColorKey: 1.5.3
    ChimeraX-CommandLine: 1.2.5
    ChimeraX-ConnectStructure: 2.0.1
    ChimeraX-Contacts: 1.0.1
    ChimeraX-Core: 1.6.dev202302110040
    ChimeraX-CoreFormats: 1.1
    ChimeraX-coulombic: 1.4.2
    ChimeraX-Crosslinks: 1.0
    ChimeraX-Crystal: 1.0
    ChimeraX-CrystalContacts: 1.0.1
    ChimeraX-DataFormats: 1.2.3
    ChimeraX-Dicom: 1.1
    ChimeraX-DistMonitor: 1.3.3
    ChimeraX-DockPrep: 1.1
    ChimeraX-Dssp: 2.0
    ChimeraX-EMDB-SFF: 1.0
    ChimeraX-ESMFold: 1.0
    ChimeraX-ExperimentalCommands: 1.0
    ChimeraX-FileHistory: 1.0.1
    ChimeraX-FunctionKey: 1.0.1
    ChimeraX-Geometry: 1.3
    ChimeraX-gltf: 1.0
    ChimeraX-Graphics: 1.1.1
    ChimeraX-Hbonds: 2.4
    ChimeraX-Help: 1.2.1
    ChimeraX-HKCage: 1.3
    ChimeraX-IHM: 1.1
    ChimeraX-ImageFormats: 1.2
    ChimeraX-IMOD: 1.0
    ChimeraX-IO: 1.0.1
    ChimeraX-ItemsInspection: 1.0.1
    ChimeraX-Label: 1.1.7
    ChimeraX-ListInfo: 1.1.1
    ChimeraX-Log: 1.1.5
    ChimeraX-LookingGlass: 1.1
    ChimeraX-Maestro: 1.8.2
    ChimeraX-Map: 1.1.4
    ChimeraX-MapData: 2.0
    ChimeraX-MapEraser: 1.0.1
    ChimeraX-MapFilter: 2.0.1
    ChimeraX-MapFit: 2.0
    ChimeraX-MapSeries: 2.1.1
    ChimeraX-Markers: 1.0.1
    ChimeraX-Mask: 1.0.2
    ChimeraX-MatchMaker: 2.0.11
    ChimeraX-MDcrds: 2.6
    ChimeraX-MedicalToolbar: 1.0.2
    ChimeraX-Meeting: 1.0.1
    ChimeraX-MLP: 1.1.1
    ChimeraX-mmCIF: 2.11
    ChimeraX-MMTF: 2.2
    ChimeraX-Modeller: 1.5.8
    ChimeraX-ModelPanel: 1.3.6
    ChimeraX-ModelSeries: 1.0.1
    ChimeraX-Mol2: 2.0
    ChimeraX-Mole: 1.0
    ChimeraX-Morph: 1.0.2
    ChimeraX-MouseModes: 1.2
    ChimeraX-Movie: 1.0
    ChimeraX-Neuron: 1.0
    ChimeraX-Nucleotides: 2.0.3
    ChimeraX-OpenCommand: 1.10.1
    ChimeraX-PDB: 2.6.13
    ChimeraX-PDBBio: 1.0
    ChimeraX-PDBLibrary: 1.0.2
    ChimeraX-PDBMatrices: 1.0
    ChimeraX-PickBlobs: 1.0.1
    ChimeraX-Positions: 1.0
    ChimeraX-PresetMgr: 1.1
    ChimeraX-PubChem: 2.1
    ChimeraX-ReadPbonds: 1.0.1
    ChimeraX-Registration: 1.1.1
    ChimeraX-RemoteControl: 1.0
    ChimeraX-RenderByAttr: 1.0
    ChimeraX-RenumberResidues: 1.1
    ChimeraX-ResidueFit: 1.0.1
    ChimeraX-RestServer: 1.1
    ChimeraX-RNALayout: 1.0
    ChimeraX-RotamerLibMgr: 3.0
    ChimeraX-RotamerLibsDunbrack: 2.0
    ChimeraX-RotamerLibsDynameomics: 2.0
    ChimeraX-RotamerLibsRichardson: 2.0
    ChimeraX-SaveCommand: 1.5.1
    ChimeraX-SchemeMgr: 1.0
    ChimeraX-SDF: 2.0.1
    ChimeraX-Segger: 1.0
    ChimeraX-Segment: 1.0.1
    ChimeraX-SelInspector: 1.0
    ChimeraX-SeqView: 2.8.1
    ChimeraX-Shape: 1.0.1
    ChimeraX-Shell: 1.0.1
    ChimeraX-Shortcuts: 1.1.1
    ChimeraX-ShowSequences: 1.0.1
    ChimeraX-SideView: 1.0.1
    ChimeraX-Smiles: 2.1
    ChimeraX-SmoothLines: 1.0
    ChimeraX-SpaceNavigator: 1.0
    ChimeraX-StdCommands: 1.10.1
    ChimeraX-STL: 1.0.1
    ChimeraX-Storm: 1.0
    ChimeraX-StructMeasure: 1.1.1
    ChimeraX-Struts: 1.0.1
    ChimeraX-Surface: 1.0.1
    ChimeraX-SwapAA: 2.0.1
    ChimeraX-SwapRes: 2.2.1
    ChimeraX-TapeMeasure: 1.0
    ChimeraX-Test: 1.0
    ChimeraX-Toolbar: 1.1.2
    ChimeraX-ToolshedUtils: 1.2.1
    ChimeraX-Topography: 1.0
    ChimeraX-Tug: 1.0.1
    ChimeraX-UI: 1.27
    ChimeraX-uniprot: 2.2.2
    ChimeraX-UnitCell: 1.0.1
    ChimeraX-ViewDockX: 1.2
    ChimeraX-VIPERdb: 1.0
    ChimeraX-Vive: 1.1
    ChimeraX-VolumeMenu: 1.0.1
    ChimeraX-VTK: 1.0
    ChimeraX-WavefrontOBJ: 1.0
    ChimeraX-WebCam: 1.0.2
    ChimeraX-WebServices: 1.1.1
    ChimeraX-Zone: 1.0.1
    colorama: 0.4.6
    comm: 0.1.2
    contourpy: 1.0.7
    cxservices: 1.2.2
    cycler: 0.11.0
    Cython: 0.29.33
    debugpy: 1.6.6
    decorator: 5.1.1
    docutils: 0.19
    executing: 1.2.0
    filelock: 3.9.0
    fonttools: 4.38.0
    funcparserlib: 1.0.1
    grako: 3.16.5
    h5py: 3.8.0
    html2text: 2020.1.16
    idna: 3.4
    ihm: 0.35
    imagecodecs: 2023.1.23
    imagesize: 1.4.1
    ipykernel: 6.21.1
    ipython: 8.9.0
    ipython-genutils: 0.2.0
    ipywidgets: 8.0.4
    jedi: 0.18.2
    Jinja2: 3.1.2
    jupyter-client: 8.0.2
    jupyter-core: 5.2.0
    jupyterlab-widgets: 3.0.5
    kiwisolver: 1.4.4
    line-profiler: 4.0.2
    lxml: 4.9.2
    lz4: 4.3.2
    MarkupSafe: 2.1.2
    matplotlib: 3.6.3
    matplotlib-inline: 0.1.6
    msgpack: 1.0.4
    nest-asyncio: 1.5.6
    netCDF4: 1.6.2
    networkx: 2.8.8
    numexpr: 2.8.4
    numpy: 1.23.5
    openvr: 1.23.701
    packaging: 21.3
    pandas: 1.5.3
    ParmEd: 3.4.3
    parso: 0.8.3
    pep517: 0.13.0
    pexpect: 4.8.0
    pickleshare: 0.7.5
    Pillow: 9.3.0
    pip: 23.0
    pkginfo: 1.9.6
    platformdirs: 3.0.0
    prompt-toolkit: 3.0.36
    psutil: 5.9.4
    ptyprocess: 0.7.0
    pure-eval: 0.2.2
    py-cpuinfo: 9.0.0
    pycollada: 0.7.2
    pydicom: 2.3.0
    Pygments: 2.14.0
    PyOpenGL: 3.1.6
    PyOpenGL-accelerate: 3.1.6
    pyparsing: 3.0.9
    pyproject-hooks: 1.0.0
    PyQt6: 6.4.2
    PyQt6-Qt6: 6.4.2
    PyQt6-sip: 13.4.1
    PyQt6-WebEngine: 6.4.0
    PyQt6-WebEngine-Qt6: 6.4.2
    python-dateutil: 2.8.2
    pytz: 2022.7.1
    pyzmq: 25.0.0
    qtconsole: 5.4.0
    QtPy: 2.3.0
    RandomWords: 0.4.0
    requests: 2.28.2
    scipy: 1.9.3
    setuptools: 65.1.1
    setuptools-scm: 7.0.5
    sfftk-rw: 0.7.3
    six: 1.16.0
    snowballstemmer: 2.2.0
    sortedcontainers: 2.4.0
    soupsieve: 2.3.2.post1
    sphinx: 6.1.3
    sphinx-autodoc-typehints: 1.22
    sphinxcontrib-applehelp: 1.0.4
    sphinxcontrib-blockdiag: 3.0.0
    sphinxcontrib-devhelp: 1.0.2
    sphinxcontrib-htmlhelp: 2.0.1
    sphinxcontrib-jsmath: 1.0.1
    sphinxcontrib-qthelp: 1.0.3
    sphinxcontrib-serializinghtml: 1.1.5
    stack-data: 0.6.2
    tables: 3.8.0
    tcia-utils: 1.0.2
    tifffile: 2022.10.10
    tinyarray: 1.2.4
    tomli: 2.0.1
    tornado: 6.2
    traitlets: 5.9.0
    typing-extensions: 4.4.0
    urllib3: 1.26.14
    wcwidth: 0.2.6
    webcolors: 1.12
    wheel: 0.38.4
    wheel-filename: 1.4.1
    widgetsnbextension: 4.0.5

[Tom Goddard]

Fixed in python311 branch.

Standard Python module email.utils function parsedate_to_datetime() in Python 3.11 now throws ValueError instead of TypeError when given None as an argument. The fetch code was using this call apparently to check some timestamp.