install python 3.9

mx-linux/mx-19.3.sh

@@ -23,6 +23,15 @@ echo 'deb [arch=amd64 signed-by=/usr/share/keyrings/signal-desktop-keyring.gpg]
   sudo tee -a /etc/apt/sources.list.d/signal-xenial.list
 apt-get update $1
 apt-get upgrade $1
+#<-- install python 3.9
+apt-get install $1 build-essential zlib1g-dev libncurses5-dev libgdbm-dev libnss3-dev libssl-dev libsqlite3-dev libreadline-dev libffi-dev curl libbz2-dev
+wget https://www.python.org/ftp/python/3.9.1/Python-3.9.1.tgz
+tar -xf Python-3.9.1.tgz
+cd Python-3.9.1
+./configure --enable-optimizations
+make -j 2
+make install
+#-->
 apt-get install $1 net-tools
 apt-get install $1 telegram
 apt-get install $1 signal-desktop