def read_pref_mode_from_name(name):
    return _MONGOS_MODES.index(name)
Insert last argument to the previous command (the last word of
dataset/ETHPy150Open mongodb/mongo-python-driver/pymongo/read_preferences.py/read_pref_mode_from_name--crossover with--dataset/ETHPy150Open deanhiller/databus/webapp/play1.3.x/python/Lib/site-packages/pyreadline/modes/emacs.py/EmacsMode.yank_last_arg