Print unused packages in python scripts

pyunused.sh

# bash pyunused.sh filename.py

s=$(cat $1 | grep import | grep as | awk '{print $4}')
t=$(cat $1 | grep import | grep -v as | awk '{print $2}')

echo "Following unused packages"
echo "-------------------------"
for el in $s; do 
	count=$(cat $1 | grep $el | wc -l)
	if (( ${count} == 1 )); then
		echo $el
	fi
done
for el in $t; do 
	count=$(cat $1 | grep $el | wc -l)
	if (( ${count} == 1 )); then
		echo $el
	fi
done