Disconnect docker container from network

#!/bin/bash

app=$1

if [ "$#" -ne 1 ]; then
    echo "./docker_network.sh [app_id]"
else
    case "$1" in
            help)
            echo "./docker_network.sh [app_id]"
            ;;
            *)
            if [ -f /tmp/inspect.txt ]; then
                    rm /tmp/inspect.txt
                    echo "inspect.txt found! Will remove now"
            fi
            if [ -f /tmp/inspect2.txt ]; then
                    rm /tmp/inspect2.txt
                    echo "inspect2.txt found! Will remove now"
            fi
            docker network inspect $app | grep Name > /tmp/inspect.txt
            sed -i '1d' /tmp/inspect.txt
            cut -d' ' -f18- /tmp/inspect.txt > /tmp/inspect2.txt
            sed -i 's/^.//' /tmp/inspect2.txt
            sed -i 's/.\{2\}$//' /tmp/inspect2.txt
            clients_array=( $(cat /tmp/inspect2.txt)  )

            for i in "${clients_array[@]}"; do
                   docker network disconnect -f $app $i
                   echo "Disconnected $i from $app"
            done
            echo "Finished [SUCCESS] !"
            ;;
    esac
fi