➜  Wikimedia UseThisFile Python script.py0.tmp  pip install selenium
Collecting selenium
  Using cached selenium-2.47.1-py2-none-any.whl
Installing collected packages: selenium
Exception:
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/basecommand.py", line 211, in main
    status = self.run(options, args)
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/commands/install.py", line 311, in run
    root=options.root_path,
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_set.py", line 646, in install
    **kwargs
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_install.py", line 803, in install
    self.move_wheel_files(self.source_dir, root=root)
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_install.py", line 998, in move_wheel_files
    isolated=self.isolated,
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/wheel.py", line 339, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/wheel.py", line 310, in clobber
    ensure_dir(destdir)
  File "/Library/Python/2.7/site-packages/pip-7.1.2-py2.7.egg/pip/utils/__init__.py", line 71, 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/selenium'