#! /usr/bin/env python """Print names of all methods defined in module This script demonstrates use of the visitor interface of the compilerpackage.""" import compiler class MethodFinder:    """Print the names of all the methods     Each visit method takes two arguments, the node and its current    scope.  The scope is the name of the current class or None.    """     def visitClass(self, node, scope=None):        self.visit(node.code, node.name)     def visitFunction(self, node, scope=None):        if scope is not None:            print "%s.%s" % (scope, node.name)        self.visit(node.code, None) def main(files):    mf = MethodFinder()    for file in files:        f = open(file)        buf = f.read()        f.close()        ast = compiler.parse(buf)        compiler.walk(ast, mf) if __name__ == "__main__":    import sys     main(sys.argv[1:])