Error when starting labgrid-client: ValueError: No mandatory attributes allowed after an attribute.... about labgrid HOT 5 CLOSED

An update to attrs breaks labgrid, see #165, we plan to do a release soon, but not before next year. For now please use the git master as described in the development docs.

from labgrid.

If the dev installation did not fix the problem please reopen this issue. I'll close this for now since a stable release is already tracked in #166.

from labgrid.

I have seen this bug to day with the 'master'
(labgrid-venv) wiens@es-lxwiens2:~/proj/BspTests/labgrid$ labgrid-client --help Traceback (most recent call last): File "/home/wiens/proj/BspTests/labgrid-venv/bin/labgrid-client", line 6, in <module> from labgrid.remote.client import main File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/labgrid/__init__.py", line 1, in <module> from .target import Target File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/labgrid/target.py", line 6, in <module> from .driver import Driver File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/labgrid/driver/__init__.py", line 3, in <module> from .serialdriver import SerialDriver File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/labgrid/driver/serialdriver.py", line 10, in <module> from ..resource import SerialPort, NetworkSerialPort File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/labgrid/resource/__init__.py", line 7, in <module> from .udev import USBSerialPort File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/labgrid/resource/udev.py", line 148, in <module> class USBSerialPort(SerialPort, USBResource): File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/attr/_make.py", line 702, in attrs return wrap(maybe_cls) File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/attr/_make.py", line 671, in wrap builder = _ClassBuilder(cls, these, slots, frozen, auto_attribs) File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/attr/_make.py", line 371, in __init__ attrs, super_attrs = _transform_attrs(cls, these, auto_attribs) File "/home/wiens/proj/BspTests/labgrid-venv/lib/python3.5/site-packages/attr/_make.py", line 337, in _transform_attrs .format(a=a) ValueError: No mandatory attributes allowed after an attribute with a default value or factory. Attribute in question: Attribute(name='match', default=NOTHING, validator=<instance_of validator for type <class 'dict'>>, repr=True, cmp=True, hash=False, init=True, metadata=mappingproxy({}), type=None, converter=None)

from labgrid.

Yes, the fix for attrs 17.4.0 is included in PR #189 as ecbdf6c . Unfortunately the attrs library had to include a breaking change in their release.

from labgrid.

PR #189 got merged with additional steps to reduce future problems with upstream libraries. We also updated the installation instructions, take a look at the new Installation section.

from labgrid.