Python Lists. Python has a great built-in list type named list. List literals are written within square brackets [ ]. Lists work similarly to strings -- use the len() function and square brackets [ ] to access data, with the first element at index 0.ython Lists. Python has a great built-in list type named list. List literals are written within square brackets [ ]. Lists work similarly to strings -- use the len() function and square brackets [ ] to access data, with the first element at index 0.
Normally, swallowing causes a little click or popping sound in the ear. This occurs because a small bubble of air has entered the middle ear, up from the back of the nose. It passes through the Eustachian tube, a membrane-lined tube about the size of a pencil lead that connects the back of the nose with the middle ear.
No one knows exactly what causes the common sounds of joint cracking and popping. It could be caused by ligaments stretching and releasing or by the compression of nitrogen bubbles in the spaces of the joints. Joint cracking and popping on its own does not require treatment. It is normal, and these joint sounds may also increase with age. If you hear a popping sound in your joint and experience pain and swelling, you may have an injury that requires treatment.