AST Objects
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Ordered and equality comparisons are supported between AST objects.
Pickling of AST objects (using the `pickle' module) is also supported.
`ASTType'
The type of the objects returned by `expr()', `suite()' and
`sequence2ast()'.
AST objects have the following methods:
`compile([filename])'
Same as `compileast(AST, FILENAME)'.
`isexpr()'
Same as `isexpr(AST)'.
`issuite()'
Same as `issuite(AST)'.
`tolist([line_info])'
Same as `ast2list(AST, LINE_INFO)'.
`totuple([line_info])'
Same as `ast2tuple(AST, LINE_INFO)'.