我无权在虚拟环境中安装numpy（ubuntu 14.04）：
(DeepL)jeanpat@laptop:~$ pip3 install -U numpy
Downloading/unpacking numpy from https://pypi.python.org/packages/dd/9f/cd0ec9c50e4ed8650901ad4afde164e5252b6182a9e0c7bff5f8b4441960/numpy-1.11.1.zip#md5=5caa3428b24aaa07e72c79d115140e46
Downloading numpy-1.11.1.zip (4.7MB): 4.7MB downloaded
Running setup.py (path:/tmp/pip_build_jeanpat/numpy/setup.py) egg_info for package numpy
Running from numpy source directory.
warning: no previously-included files matching '*.pyc' found anywhere in distribution
warning: no previously-included files matching '*.pyo' found anywhere in distribution
warning: no previously-included files matching '*.pyd' found anywhere in distribution
Installing collected packages: numpy
Found existing installation: numpy 1.8.2
Uninstalling numpy:
Cleaning up...
Exception:
Traceback (most recent call last):
File "/usr/lib/python3.4/shutil.py", line 523, in move
os.rename(src, real_dst)
PermissionError: [Errno 13] Permission denied: '/usr/lib/python3/dist-packages/numpy-1.8.2.egg-info' -> '/tmp/pip-0leid8xu-uninstall/usr/lib/python3/dist-packages/numpy-1.8.2.egg-info'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/lib/python3/dist-packages/pip/commands/install.py", line 283, in run
requirement_set.install(install_options, global_options, root=options.root_path)
File "/usr/lib/python3/dist-packages/pip/req.py", line 1432, in install
requirement.uninstall(auto_confirm=True)
File "/usr/lib/python3/dist-packages/pip/req.py", line 599, in uninstall
paths_to_remove.remove(auto_confirm)
File "/usr/lib/python3/dist-packages/pip/req.py", line 1845, in remove
renames(path, new_path)
File "/usr/lib/python3/dist-packages/pip/util.py", line 296, in renames
shutil.move(old, new)
File "/usr/lib/python3.4/shutil.py", line 536, in move
os.unlink(src)
PermissionError: [Errno 13] Permission denied: '/usr/lib/python3/dist-packages/numpy-1.8.2.egg-info'
Storing debug log for failure in /home/jeanpat/.pip/pip.log
这很奇怪，因为python2的numpy安装在等待：
/home/jeanpat/Developpements/DeepL/lib/python2.7/site-packages/numpy
如何解决这个问题？我的错误是什么？