Packages not installing with Pip?

Question

Python

Good afternoon. I'm new to Python, I'm switching to it after Java. And I've already run into problems. Trying to install some package with Pip in Ubuntu terminal. Packages are not installed. Gives errors:

Downloading/unpacking selenium
  Downloading selenium-3.0.2-py2.py3-none-any.whl (915kB): 915kB downloaded
Installing collected packages: selenium
Cleaning up...
Exception:
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 1436, in install
    requirement.install(install_options, global_options, *args, **kwargs)
  File "/usr/lib/python3/dist-packages/pip/req.py", line 672, in install
    self.move_wheel_files(self.source_dir, root=root)
  File "/usr/lib/python3/dist-packages/pip/req.py", line 902, in move_wheel_files
    pycompile=self.pycompile,
  File "/usr/lib/python3/dist-packages/pip/wheel.py", line 206, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/usr/lib/python3/dist-packages/pip/wheel.py", line 193, in clobber
    os.makedirs(destsubdir)
  File "/usr/lib/python3.4/os.py", line 237, in makedirs
    mkdir(name, mode)
PermissionError: [Errno 13] Permission denied: '/usr/local/lib/python3.4/dist-packages/selenium'

Storing debug log for failure in /home/user/.pip/pip.log

error: could not create '/usr/local/lib/python3.4/dist-packages/numpy': Permission denied

----------------------------------------
Cleaning up...
Command /usr/bin/python3 -c "import setuptools, tokenize;__file__='/tmp/pip_build_user/numpy/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-y50gyst1-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_user/numpy
Storing debug log for failure in /home/user/.pip/pip.log

Answer 1

Use sudo before pip

Answer 2

Do not use sudo before pip
Under the project, create a virtual environment and work there

mkdir ~/myproj
python3 -m venv ~/myproj/virtualenv
~/myproj/virtualenv/bin/activate
pip install selenium