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.
Thus causing the popping sensation when air suddenly rushes in or out of the tube. Dr. Eisenman says it's ok to try and equalize the pressure if your ears get uncomfortable. Eisenman: And the way you do it is by trying to get the eustachian tube to open and close, such as by swallowing or chewing on something. Or you can pinch your nose and try to push air actively back into the middle ears to do that. If you would like to pop a science question on us, call us at 1-800-WHY-ISIT. I'm Bob Hirshon for AAAS, the Science Society.