解析Python来实例

Question

我想分析纯Python代码到类似的东西代表的原代码各部分的某些类的实例列表列表..

一个例子：

>>> text = ''' 
... for x in range(100): 
...  print x 
... ''' 
>>> tree = parse(text) 
>>> print tree 
Tree(ForLoop(x,Range(100), [Stmt(Print(x))])) 
# here ForLoop, Range, Stmt, Print are all custom classes 

Answer 1

的ast module有你需要的工具：

>>> import ast 
>>> text = ''' 
for x in range(100): 
    print x 
''' 

>>> m = ast.parse(text) 
>>> ast.dump(m) 
"Module(body=[For(target=Name(id='x', ctx=Store()), iter=Call(func=Name(id='range', ctx=Load()), 
     args=[Num(n=100)], keywords=[], starargs=None, kwargs=None), 
     body=[Print(dest=None, values=[Name(id='x', ctx=Load())], nl=True)], orelse=[])])"