What is VANET and it's application?

VANET
VANET means Vehicular Ad Hoc Network.

Definition: A VANET is a  technology that uses moving cars as nodes in a network to create a mobile network.It's an emerging new technology to integrate the capabilities of new generation wireless networks to vehicles.
It is a sub form of MANET that provides communication between vehicles and vehicles and road-side base stations with an  aim of providing efficient and safe transportation.


Application Of VANET:  

VANET has vast application.Some of these are--

1.Warning about accidents,violation of traffic signals,wrong way driving and much more.
2.Information about near by restaurant,hotels and gas stations,play on-line game and access the internet.
3.Electronic brake lights,which allow a driver to react to vehicles braking even though they
they might be obscured.
4.Traffic information systems,which use VANET communication to provide up-to-the minute
obstacle reports to a vehicles's satellite navigation system. 

Python dictionary clear

dictionary.clear() method removes all items from the dictionary.

Example: 

                                dic={1:"one",2:"two"}

                  print(dic)

                  dic.clear()

                 output: dic ={}

what means any and all in python?

In python any is used for OR operation.If any of the item is true then returns true.

And all represent AND if all of the item is true then returns true.

example:                                           


 >>> any([True,True])
True
>>> any([True,False])
True                          

Example for all operation: 
>> all([True,True])
True
>>> all([True,False])
False
>>> all([False,False])
False