prepare_dict.sh脚本运行时，报错g2p.py is not found. Checkout tools/extras/install_sequitur.sh.。解决方案：回到tools/extras目录下，运行install_sequitur.sh脚本，此时报错：./install_sequitur.sh: Error: I require swig but it's not installed.Please install swig and run this script again. 解决方案：sudo apt-get install swig即可。然后重新运行install_sequitur.sh脚本，成功。
