def default_searchers():
searchers = []
from sett.pip import VENV_BIN
if VENV_BIN.exists():
searchers.append(DirectorySearcher(VENV_BIN))
from sett.npm import NODE_MODULES
if NODE_MODULES.exists():
searchers.append(DirectorySearcher(NODE_MODULES.joinpath('.bin')))
from sett.gem import GEM_HOME
if GEM_HOME.exists():
searchers.append(DirectorySearcher(GEM_HOME.joinpath('bin')))
if os.environ.get('PATH'):
searchers.append(DirectoriesSearcher(os.environ['PATH'].split(':')))
return searchers
