variable « Introduction « Python Tutorial

1.5.1.A variable is basically a name that represents some value
1.5.2.Sequence Unpacking
1.5.3.A literal is a number or string that appears directly in a program.
1.5.4.Python is dynamically typed, no pre-declaration of a variable or its type is necessary.
1.5.5.Once a variable has been assigned, you can access it by using its name
1.5.6.None placeholder