1、替換安裝庫（在國內用起來更為方便快捷）
清華或阿里的都可以
Ubuntu 19.04 國內更新源：https://blog.csdn.net/wy_bk/article/details/89473921
sources.list（存放在你能找得到的位置，推薦放在desktop目錄下）
gedit sources.list # 在相應的位置創建文本
# 以下是阿里19.04的庫 deb http://mirrors.aliyun.com/ubuntu/ disco main restricted universe multiverse # deb-src http://mirrors.aliyun.com/ubuntu/ disco main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-security main restricted universe multiverse # deb-src http://mirrors.aliyun.com/ubuntu/ disco-security main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-updates main restricted universe multiverse # deb-src http://mirrors.aliyun.com/ubuntu/ disco-updates main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-backports main restricted universe multiverse # deb-src http://mirrors.aliyun.com/ubuntu/ disco-backports main restricted universe multiverse deb http://mirrors.aliyun.com/ubuntu/ disco-proposed main restricted universe multiverse # deb-src http://mirrors.aliyun.com/ubuntu/ disco-proposed main restricted universe multiverse
# 18.04清華源 deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-updates main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-backports main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-security main restricted universe multiverse deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse # deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ bionic-proposed main restricted universe multiverse
替換原庫
sudo -s # 先獲取管理員權限才能替換系統文件
cp sources.list /etc/apt/ # cp:copy的意思 （替換時保證命令在文件所在路徑，如：～/Desktop# cp sources.list /etc/apt/, #前為當前路徑）
替換完成后則需要進行更新
apt-get update
2、安裝gtk-3
apt-get install libgtk-3-dev
3、安裝gobject-introspection
apt-get install python3-gi
其他linux小知識：
1 賦予管理員權限
sudo -s
2 查找自己所需的文件（可通過文件信息查找）
apt-cache search python gobject
3 按tab鍵可自動補齊命令
4 可以通過輸入部分命令（關鍵字），來查找自己所需要的命令