python3交互式退格方向键问题

1. 问题

   ]# python3
   Python 3.6.10 (default, Sep 30 2020, 11:38:05)
   [GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux
   Type "help", "copyright", "credits" or "license" for more information.
   >>> aaa^H^H
   # 方向键与退格键无法使用
   

2. 解决

   ]# yum -y install patch readline-devel
   ]# wget https://pypi.python.org/packages/source/r/readline/readline-6.2.4.1.tar.gz
   ]# tar -xf readline-6.2.4.1
   ]# cd readline-6.2.4.1
   ]# python3 setup.py install
   # 测试可以直接使用