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参考：

#在python2下安装pip

sudo apt-get install python-pip sudo python -m pip install --upgrade --force pip  sudo pip install setuptools==41.6.0

#在python3下安装pip

sudo apt-get install python3-pip sudo python3 -m pip install --upgrade --force pip  sudo pip3 install setuptools==41.6.0

 

安装lableme就不会出现这种错误了，其他软件也是如此

sudo pip3 install pyqt5  -i https://pypi.tuna.tsinghua.edu.cn/simple

sudo pip3 install labelme

 

如果有错误：

升级

sudo pip3 install setuptools==41.6.0

ERROR: Exception:Traceback (most recent call last):  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/cli/base_command.py", line 186, in _main    status = self.run(options, args)  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/commands/install.py", line 331, in run    resolver.resolve(requirement_set)  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/legacy_resolve.py", line 177, in resolve    discovered_reqs.extend(self._resolve_one(requirement_set, req))  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/legacy_resolve.py", line 333, in _resolve_one    abstract_dist = self._get_abstract_dist_for(req_to_install)  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/legacy_resolve.py", line 282, in _get_abstract_dist_for    abstract_dist = self.preparer.prepare_linked_requirement(req)  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/operations/prepare.py", line 516, in prepare_linked_requirement    req, self.req_tracker, self.finder, self.build_isolation,  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/operations/prepare.py", line 95, in _get_prepared_distribution    abstract_dist.prepare_distribution_metadata(finder, build_isolation)  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/distributions/sdist.py", line 38, in prepare_distribution_metadata    self._setup_isolation(finder)  File "/usr/local/lib/python3.5/dist-packages/pip/_internal/distributions/sdist.py", line 96, in _setup_isolation    reqs = backend.get_requires_for_build_wheel()  File "/usr/local/lib/python3.5/dist-packages/pip/_vendor/pep517/wrappers.py", line 152, in get_requires_for_build_wheel    'config_settings': config_settings  File "/usr/local/lib/python3.5/dist-packages/pip/_vendor/pep517/wrappers.py", line 255, in _call_hook    raise BackendUnavailable(data.get('traceback', ''))pip._vendor.pep517.wrappers.BackendUnavailable: Traceback (most recent call last):  File "/usr/local/lib/python3.5/dist-packages/pip/_vendor/pep517/_in_process.py", line 63, in _build_backend    obj = import_module(mod_path)  File "/usr/lib/python3.5/importlib/__init__.py", line 126, in import_module    return _bootstrap._gcd_import(name[level:], package, level)  File "
   
    ", line 986, in _gcd_import  File "
    
     ", line 969, in _find_and_load  File "
     
      ", line 956, in _find_and_load_unlockedImportError: No module named 'setuptools.build_meta'
     
    
   

 

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