Description:
Trying to install livestreamer via pacman returns in a python error:

sudo pacman -S livestreamer
resolving dependencies...
looking for conflicting packages...
Packages (3) python-chardet-2.3.0-2 python-requests-2.10.0-1 livestreamer-1.12.2-2
Total Download Size: 0.29 MiB
Total Installed Size: 3.98 MiB
:: Proceed with installation? [Y/n] Y
:: Retrieving packages...
livestreamer-1.12.2-2-any
(3/3) checking keys in keyring
(3/3) checking package integrity
(3/3) loading package files
(3/3) checking for file conflicts
error: failed to commit transaction (conflicting files)
python-requests: /usr/lib/python3.5/site-packages/requests/__init__.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/__init__.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/adapters.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/api.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/auth.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/certs.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/compat.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/cookies.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/exceptions.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/hooks.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/models.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/sessions.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/status_codes.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/structures.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/__pycache__/utils.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/adapters.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/api.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/auth.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/certs.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/compat.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/cookies.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/exceptions.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/hooks.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/models.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/packages/__init__.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/packages/__pycache__/__init__.cpython-35.pyc exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/sessions.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/status_codes.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/structures.py exists in filesystem
python-requests: /usr/lib/python3.5/site-packages/requests/utils.py exists in filesystem
Errors occurred, no packages were upgraded.

Maybe it should check whether those packages are already installed and if yes ignore them.

Additional info:
* package version: livestreamer-1.12.2-2


Steps to reproduce:
* Have python3.5-requests installed
* Install livestreamer-1.12.2-2 via pacman