Raspi Zero W upgrade error from 8.10.1 --> 8.11.0 Exception checking python dependency: usb.core

aka · June 6, 2021, 9:30pm

Hi, I was upgrading my RasPi Zero W instance and encountered this error. I’m invesitgating now but thought I’d share in case anyone had already seen it and knew a fix.

The Pi Zero has no peripherals attached - it’s just logging CPU/GPU temperatures now.

I’ll update when I learn more. Thanks for any help / troubleshooting tips you might have!

AKA

KyleGabriel · June 6, 2021, 9:32pm

That’s expected. It doesn’t impact the upgrade.

aka · June 6, 2021, 9:33pm

Oh, that’s a simple fix

Thanks!

KyleGabriel · June 6, 2021, 11:22pm

This error results from the dependency-checker not able to properly attempt to import “usb.core” because it has a period in the string. I need to develop a different method for performing this check, such as generating a file with the string “import {import_name}” and attempting to run that script rather than the current method that uses “importlib.util.find_spec(package)”:

github.com

kizniche/Mycodo/blob/99d89f534d928b3b019eb37559292c0321e72a9f/mycodo/utils/update_dependencies.py#L61

    
      
          ]
          
          
for each_section in list_dependencies:
              for device_type in each_section:
                  if 'dependencies_module' in each_section[device_type]:
                      dep_mod = each_section[device_type]['dependencies_module']
                      for (install_type, package, install_id) in dep_mod:
                          entry = '{0} {1}'.format(install_type, install_id)
                          if install_type in ['pip-pypi', 'pip-git']:
                              try:
                                  module = importlib.util.find_spec(package)
                                  if module is not None and entry not in met_deps:
                                      met_deps.append(entry)
                              except Exception:
                                  logger.error(
                                      'Exception checking python dependency: '
                                      '{dep}'.format(dep=package))
                          elif install_type == 'apt':
                              start = "dpkg-query -W -f='${Status}'"
                              end = '2>/dev/null | grep -c "ok installed"'
                              cmd = "{} {} {}".format(start, package, end)