220         scope = self.module = self.scopes[node] = ModuleScope()
221         self.visit(node.node, scope)
231         scope = FunctionScope(node.name, self.module, self.klass)
233             scope.nested = 1
234         self.scopes[node] = scope
235         self._do_args(scope, node.argnames)
236         self.visit(node.code, scope)
237         self.handle_free_vars(scope, parent)
240         scope = GenExprScope(self.module, self.klass);
243             scope.nested = 1
245         self.scopes[node] = scope
246         self.visit(node.code, scope)
248         self.handle_free_vars(scope, parent)
250     def visitGenExprInner(self, node, scope):  argument
252             self.visit(genfor, scope)
254         self.visit(node.expr, scope)
256     def visitGenExprFor(self, node, scope):  argument
257         self.visit(node.assign, scope, 1)
258         self.visit(node.iter, scope)
260             self.visit(if_, scope)
262     def visitGenExprIf(self, node, scope):  argument
263         self.visit(node.test, scope)
273         scope = LambdaScope(self.module, self.klass)
275             scope.nested = 1
276         self.scopes[node] = scope
277         self._do_args(scope, node.argnames)
278         self.visit(node.code, scope)
279         self.handle_free_vars(scope, parent)
281     def _do_args(self, scope, args):  argument
284                 self._do_args(scope, name)
286                 scope.add_param(name)
288     def handle_free_vars(self, scope, parent):  argument
289         parent.add_child(scope)
290         scope.handle_children()
296         scope = ClassScope(node.name, self.module)
298             scope.nested = 1
300             scope.add_def('__doc__')
301         scope.add_def('__module__')
302         self.scopes[node] = scope
305         self.visit(node.code, scope)
307         self.handle_free_vars(scope, parent)
315     def visitName(self, node, scope, assign=0):  argument
317             scope.add_def(node.name)
319             scope.add_use(node.name)
323     def visitFor(self, node, scope):  argument
324         self.visit(node.assign, scope, 1)
325         self.visit(node.list, scope)
326         self.visit(node.body, scope)
328             self.visit(node.else_, scope)
330     def visitFrom(self, node, scope):  argument
334             scope.add_def(asname or name)
336     def visitImport(self, node, scope):  argument
341             scope.add_def(asname or name)
343     def visitGlobal(self, node, scope):  argument
345             scope.add_global(name)
347     def visitAssign(self, node, scope):  argument
361             self.visit(n, scope, 1)
362         self.visit(node.expr, scope)
364     def visitAssName(self, node, scope, assign=1):  argument
365         scope.add_def(node.name)
367     def visitAssAttr(self, node, scope, assign=0):  argument
368         self.visit(node.expr, scope, 0)
370     def visitSubscript(self, node, scope, assign=0):  argument
371         self.visit(node.expr, scope, 0)
373             self.visit(n, scope, 0)
375     def visitSlice(self, node, scope, assign=0):  argument
376         self.visit(node.expr, scope, 0)
378             self.visit(node.lower, scope, 0)
380             self.visit(node.upper, scope, 0)
382     def visitAugAssign(self, node, scope):  argument
385         self.visit(node.node, scope)
387             self.visit(node.node, scope, 1) # XXX worry about this
388         self.visit(node.expr, scope)
394     def visitIf(self, node, scope):  argument
400             self.visit(test, scope)
401             self.visit(body, scope)
403             self.visit(node.else_, scope)
407     def visitYield(self, node, scope):  argument
408         scope.generator = 1
409         self.visit(node.value, scope)