Korzystanie z najnowszej (1.5) wersjipip, Pojawia się błąd podczas próby aktualizacji kilku pakietów. Na przykład,sudo pip install -U pytz skutkuje awarią z:

Wheel installs require setuptools >= 0.8 for dist-info support.
pip's wheel support requires setuptools >= 0.8 for dist-info support.

Nie rozumiem tej wiadomości(Mamsetuptools 2.1) lub co z tym zrobić.

Informacje o wyjątku z dziennika dla tego błędu:

Exception information:
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pip/basecommand.py", line 122, in main
    status = self.run(options, args)
  File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 230, in run
    finder = self._build_package_finder(options, index_urls, session)
  File "/Library/Python/2.7/site-packages/pip/commands/install.py", line 185, in _build_package_finder
    session=session,
  File "/Library/Python/2.7/site-packages/pip/index.py", line 50, in __init__
    self.use_wheel = use_wheel
  File "/Library/Python/2.7/site-packages/pip/index.py", line 89, in use_wheel
    raise InstallationError("pip's wheel support requires setuptools >= 0.8 for dist-info support.")
InstallationError: pip's wheel support requires setuptools >= 0.8 for dist-info support.