This is a python script which uses opencv, dlib, and imutils to extract the 68 facial landmark co-ordinates and draw the jaw line from it as output.
pip install numpy opencv-python dlib imutils
python main.py --image "input/punit.jpeg"
{'facial_features_cordinates': [{'Mouth': array([[210, 142],
[215, 141],
[219, 141],
[222, 141],
[226, 140],
[231, 140],
[236, 140],
[232, 144],
[227, 146],
[223, 147],
[220, 147],
[215, 146],
[212, 143],
[219, 142],
[223, 142],
[226, 142],
[234, 140],
[226, 143],
[223, 144],
[219, 144]]), 'Right_Eyebrow': array([[197, 117],
[201, 113],
[206, 113],
[212, 113],
[217, 114]]), 'Left_Eyebrow': array([[222, 114],
[227, 112],
[234, 111],
[240, 111],
[245, 114]]), 'Right_Eye': array([[203, 120],
[206, 119],
[210, 118],
[213, 119],
[210, 120],
[206, 121]]), 'Left_Eye': array([[229, 118],
[232, 117],
[236, 117],
[239, 118],
[236, 119],
[232, 119]]), 'Nose': array([[220, 118],
[220, 123],
[220, 127],
[221, 132],
[215, 135],
[218, 136],
[222, 137],
[225, 135]]), 'Jaw': array([[194, 119],
[196, 126],
[197, 133],
[199, 139],
[201, 146],
[205, 151],
[210, 155],
[217, 158],
[224, 159],
[232, 157],
[239, 154],
[244, 149],
[249, 144],
[252, 137],
[252, 129],
[252, 122],
[252, 114]])}]}