系统版本:
[root@centos76d77 14:56 ~]# cat /etc/redhat-release
CentOS Linux release 7.6.1810 (Core)
[root@centos76d77 14:56 ~]# uname -r
3.10.0-957.el7.x86_64
[root@centos76d77 14:56 ~]# python3.4
Python 3.4.10 (default, Apr 8 2019, 02:17:36)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> exit()
[root@centos76d77 17:59 ~]# pip3.4 search ipython
....
ipython (7.5.0) - IPython: Productive Interactive Computing
本机使用的python版本较老（3.4），最高仅能支持ipython 6.x，而pip中默认提供的ipython版本为7.5.0