Ich habe Probleme mit pip. Beispielsweise

pip install numpy --upgrade

Gibt mir den folgenden Fehler:

Collecting numpy
  Using cached numpy-1.10.2.tar.gz
        Exception:
    Traceback (most recent call last):
      File "/usr/local/lib/python2.7/dist-packages/pip/basecommand.py", line 211, in main
        status = self.run(options, args)
      File "/usr/local/lib/python2.7/dist-packages/pip/commands/install.py", line 305, in run
        wb.build(autobuilding=True)
      File "/usr/local/lib/python2.7/dist-packages/pip/wheel.py", line 705, in build
        self.requirement_set.prepare_files(self.finder)
      File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 334, in prepare_files
        functools.partial(self._prepare_file, finder))
      File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 321, in _walk_req_to_install
        more_reqs = handler(req_to_install)
      File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 505, in _prepare_file
        abstract_dist.prep_for_dist()
      File "/usr/local/lib/python2.7/dist-packages/pip/req/req_set.py", line 123, in prep_for_dist
        self.req_to_install.run_egg_info()
      File "/usr/local/lib/python2.7/dist-packages/pip/req/req_install.py", line 376, in run_egg_info
        self.setup_py, self.name,
      File "/usr/local/lib/python2.7/dist-packages/pip/req/req_install.py", line 347, in setup_py
        import setuptools  # noqa
      File "/usr/local/lib/python2.7/dist-packages/setuptools/__init__.py", line 12, in <module>
        from setuptools.extension import Extension
      File "/usr/local/lib/python2.7/dist-packages/setuptools/extension.py", line 8, in <module>
        from .dist import _get_unpatched
      File "/usr/local/lib/python2.7/dist-packages/setuptools/dist.py", line 19, in <module>
        import pkg_resources
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3138, in <module>
        @_call_aside
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3124, in _call_aside
        f(*args, **kwargs)
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
        working_set = WorkingSet._build_master()
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 652, in _build_master
        ws = cls()
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 645, in __init__
        self.add_entry(entry)
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 701, in add_entry
        for dist in find_distributions(entry, True):
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2139, in find_on_path
        path_item, entry, metadata, precedence=DEVELOP_DIST
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2521, in from_location
        py_version=py_version, platform=platform, **kw
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2835, in _reload_version
        md_version = _version_from_file(self._get_metadata(self.PKG_INFO))
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2486, in _version_from_file
        line = next(iter(version_lines), '')
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2654, in _get_metadata
        for line in self.get_metadata_lines(name):
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2030, in get_metadata_lines
        return yield_lines(self.get_metadata(name))
      File "/usr/local/lib/python2.7/dist-packages/pkg_resources/__init__.py", line 2025, in get_metadata
        metadata = f.read()
      File "/usr/lib/python2.7/codecs.py", line 296, in decode
        (result, consumed) = self._buffer_decode(data, self.errors, final)
    UnicodeDecodeError: 'utf8' codec can't decode byte 0xb6 in position 147: invalid start byte

Hier sind einige Hinweise:

(i) Ich habe den gleichen Fehler, wenn ich versuche, Spyder auszuführen. Es wird auch angezeigt, wenn ich versuche, andere Pakete mit pip, z. B. pandas, zu installieren.

(ii) Ich habe das Gefühl, dass dies mit der Standardcodierung zusammenhängt, da sys.getdefaultencoding mir 'ascii' gibt

Hinweis, dass es gut funktioniert, wenn ich es in einer virtuellen Umgebung mache.

Ich bin neu bei Ubuntu, also hätte ich vielleicht etwas falsch gemacht.

Setup: Python 2.7.6; pip 7.1.2; ubuntu 14.04.03.

Danke für deine Hilfe