echo '#!/usr/bin/env python' >/tmp/nep2.py
echo '#!/usr/bin/python'     >/tmp/ndp2.py
echo '#! /usr/bin/env python'>/tmp/sep2.py
echo '#! /usr/bin/python'    >/tmp/sdp2.py

echo '#!/usr/bin/env python3' >/tmp/nep3.py
echo '#!/usr/bin/python3'     >/tmp/ndp3.py
echo '#! /usr/bin/env python3'>/tmp/sep3.py
echo '#! /usr/bin/python3'    >/tmp/sdp3.py

echo 'Is Python (2) and not Python 3:'
echo -n '/tmp/nep2.py '
head -n 1 /tmp/nep2.py|grep -v python3|grep -c python
echo -n '/tmp/ndp2.py '
head -n 1 /tmp/ndp2.py|grep -v python3|grep -c python
echo -n '/tmp/sep2.py '
head -n 1 /tmp/sep2.py|grep -v python3|grep -c python
echo -n '/tmp/sdp2.py '
head -n 1 /tmp/sdp2.py|grep -v python3|grep -c python
echo -n '/tmp/nep3.py '
head -n 1 /tmp/nep3.py|grep -v python3|grep -c python
echo -n '/tmp/ndp3.py '
head -n 1 /tmp/ndp3.py|grep -v python3|grep -c python
echo -n '/tmp/sep3.py '
head -n 1 /tmp/sep3.py|grep -v python3|grep -c python
echo -n '/tmp/sdp3.py '
head -n 1 /tmp/sdp3.py|grep -v python3|grep -c python

echo 'Is Python (3) and not Python (2):'
echo -n '/tmp/nep2.py '
head -n 1 /tmp/nep2.py|grep -c python3
echo -n '/tmp/ndp2.py '
head -n 1 /tmp/ndp2.py|grep -c python3
echo -n '/tmp/sep2.py '
head -n 1 /tmp/sep2.py|grep -c python3
echo -n '/tmp/sdp2.py '
head -n 1 /tmp/sdp2.py|grep -c python3
echo -n '/tmp/nep3.py '
head -n 1 /tmp/nep3.py|grep -c python3
echo -n '/tmp/ndp3.py '
head -n 1 /tmp/ndp3.py|grep -c python3
echo -n '/tmp/sep3.py '
head -n 1 /tmp/sep3.py|grep -c python3
echo -n '/tmp/sdp3.py '
head -n 1 /tmp/sdp3.py|grep -c python3