Creating Docker Image without FROM command

Is it possible to integrate bash tool into the docker image without mentioning the FROM command, because docker shares the linux kernel and some library files. i have a doubt regarding that when i pulled docker for python in different os like kali linux and ubuntu, and when i execute a /bin/bash on the container and look into the uname i can see it gettng the dependencies from the local machine. and am a bit confused. can anyone help me in this.