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Python Tutorial » Introduction » variable   1. 5. 6. None placeholder X = None                                     # None placeholder print X  L = [None] * 100                             # Initialize a list of 100 Nones print L  print type(L)                                # Types print type(type(L))                          # Even types are objects 1. 5. variable 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

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