110 def _install_package_precheck(packages):  argument
112     packages installation should be skipped.
116     environment, chroot or a machine, has the desired packages installed
119     @param packages: A list of names of the packages to install.
127                      'skipped.', packages)
137 def _remove_banned_packages(packages, banned_packages):  argument
138     """Filter out packages.
140     @param packages: A set of packages names that have been requested.
143     @return: A sanatized set of packages names to install.
145     return {package for package in packages if package not in banned_packages}
152                            python packages should be installed.
165 def install_packages(packages=[], python_packages=[], force_latest=False):  argument
174     @param packages: A list of names of the packages to install.
175     @param python_packages: A list of names of the python packages to install
187     if not _install_package_precheck(packages or python_packages):
190     # If force_latest is False, only install packages that are not already
193         packages = [p for p in packages
197         if not packages and not python_packages:
199                 'All packages are installed already, skip reinstall.')
207     packages = [] if not packages else packages
209     packages = set(packages)
212     # segmentation faults.  Some tests request these packages, ensure they
214     packages = _remove_banned_packages(packages, ['python-pip', 'python-dev'])
216     if packages:
219             '--force-yes' % ' '.join(packages))
220         logging.debug('Packages are installed: %s.', packages)
223     # For containers running in Moblab, /usr/local/lib/python2.7/dist-packages/
225     # be installed in /usr/lib/python2.7/dist-packages/
226     # Containers created in Moblab does not have autotest/site-packages folder.
227     if not os.path.exists('/usr/local/autotest/site-packages'):
228         target_setting = '--target="/usr/lib/python2.7/dist-packages/"'
235         logging.debug('Python packages are installed: %s.', python_packages)