通过pip和HomeBrew在Mac上使用Django Python-入门

Question

I am trying to get started with Python Web Programming with Django , so I installed pip first (via HomeBrew ) and now the latest version of Django , but the following happens, which I have no idea what is wrong or what I should do next. Could someone please help me understand what is going on + what I need to do + what commands I should issue to resolve this, etc...?

$ pip --version
pip 9.0.1 from /Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg (python 2.7)

$ pip install Django==1.11.7
Collecting Django==1.11.7
  Downloading Django-1.11.7-py2.py3-none-any.whl (6.9MB)
    100% |████████████████████████████████| 7.0MB 184kB/s 
Requirement already satisfied: pytz in /System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python (from Django==1.11.7)
Installing collected packages: Django
Exception:
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/commands/install.py", line 342, in run
    prefix=options.prefix_path,
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_set.py", line 784, in install
    **kwargs
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 851, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/req/req_install.py", line 1064, in move_wheel_files
    isolated=self.isolated,
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 345, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/wheel.py", line 316, in clobber
    ensure_dir(destdir)
  File "/Library/Python/2.7/site-packages/pip-9.0.1-py2.7.egg/pip/utils/__init__.py", line 83, in ensure_dir
    os.makedirs(path)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/os.py", line 157, in makedirs
    mkdir(name, mode)
OSError: [Errno 13] Permission denied: '/Library/Python/2.7/site-packages/django'

Answer 1

This is probably because your user account doesn't have some permissions regarding the Library folder.

Use

sudo pip install Django==1.11.7

Alternative way

You might also use

pip install --user Django

which installs Django following the user installation scheme. This page says:

This scheme is designed to be the most convenient solution for users that don't have write permission to the global site-packages directory or don't want to install into it... Files will be installed into subdirectories of site.USER_BASE .

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However , I think that what you are doing isn't considered best practices.