Table of Contents
ipython notebook
或者 ?str.replace()
linux下的命令, 使用 !unix command
python3 -m pip install ipykernel
python3 -m ipykernel install # register Python 3 kernel (not technically necessary at this point, but a good idea)
python2 -m pip install ipykernel
python2 -m ipykernel install # register Python 2 kernel
