使用Nodevisotor主要是通过修改语法树上节点的方式改变AST结构,NodeTransformer主要是替换ast中的节点。 既然func_def中定义的add已经被改成一个减函数了,那么我们就彻底一点,把函数名和参数以及被调用的函数都在ast中改掉,并且将添加的函数调用log写的更加复杂一些,争取改的面目全非:-) 1 class
"""# 解析为ASTtree=ast.parse(code)# 修改ASTclassAddToSubtract(ast.NodeTransformer):defvisit_Compare(self,node):# 示例:将所有的加法替换为减法ifisinstance(node.ops[0],ast.Add):node.ops[0]=ast.Sub()returnnode transformer=AddToSubtract()modified_tree=transformer.visit(tree)# 生成新的代码new_c...
import ast # 原始代码 code = """def foo(x, y): return x + y""" # 解析代码为AST parsed_code = ast.parse(code) # 创建一个Transformer来修改AST class MyTransformer(ast.NodeTransformer): def visit_BinOp(self, node): # 修改加法为乘法 node.op = ast.Mult() self.generic_visit(node) #...
classMyTransformer(ast.NodeTransformer):defvisit_FunctionDef(self,node):node.name='greet_user'# 修改函数名为 greet_userreturnnode transformed_tree=MyTransformer().visit(tree)# 使用自定义的访问者修改 AST 1. 2. 3. 4. 5. 6. 第六步:将 AST 转回 Python 代码 使用ast.unparse()可以将修改后的 ...
1classCodeTransformer(ast.NodeTransformer):2defvisit_BinOp(self, node):3ifisinstance(node.op, ast.Add):4node.op =ast.Sub()5self.generic_visit(node)6returnnode78defvisit_FunctionDef(self, node):9self.generic_visit(node)10ifnode.name =='add':11node.name ='sub'12args_num =len(node.args...
LibCST parses code as a Concrete Syntax Tree that looks like an ast tree and keeps all formatting details. It's useful for building automated refactoring (codemod) applications and linters. Parso is a Python parser that supports error recovery and round-trip parsing for different Python versions...
tree = ast.parse('foo', mode='eval') new_tree = fix_missing_locations(RewriteName().visit(tree)) 通常你可以像这样使用转换器: node = YourTransformer().visit(node) ast.dump(node, annotate_fields=True, include_attributes=False) Return a formatted dump of the tree in node. This is ma...
LibCST parses code as a Concrete Syntax Tree that looks like an ast tree and keeps all formatting details. It's useful for building automated refactoring (codemod) applications and linters. Parso is a Python parser that supports error recovery and round-trip parsing for different Python versions...
tree = ast.parse('foo', mode='eval') new_tree = fix_missing_locations(RewriteName().visit(tree)) 通常你像这样使用转换器: node = YourTransformer().visit(node)
Class/Type:TreeTransformController 导入包:ast_tool_boxcontrollerstree_transform_controller 每个示例代码都附有代码来源和完整的源代码,希望对您的程序开发有帮助。 示例1 deftest_apply_transforms(self):ttc=TreeTransformController()ttc.ast_transformer_manager.get_ast_transformers("ctree.transformations")ttc.ast...