Test python keywords as variable names

[JamesPHoughton]

In python, the following words are reserved:

    'and',
    'as',
    'assert',
    'break',
    'class',
    'continue',
    'def',
    'del',
    'elif',
    'else',
    'except',
    'exec',
    'finally',
    'for',
    'from',
    'global',
    'if',
    'import',
    'in',
    'is',
    'lambda',
    'not',
    'or',
    'pass',
    'print',
    'raise',
    'return',
    'try',
    'while',
    'with',
    'yield',

Need to be able to handle cases where these words are used as variable names. The same is probably true for other languages as well. Those can go in another test model.