Python ast 模块，TryExcept() 实例源码

def get_compound_bodies(node):
    """Returns a list of bodies of a compound statement node.

    Args:
        node: AST node.

    Returns:
        A list of bodies of the node. If the given node does not represent
        a compound statement, an empty list is returned.
    """
    if isinstance(node, (ast.Module, ast.FunctionDef, ast.ClassDef, ast.With)):
        return [node.body]
    elif isinstance(node, (ast.If, ast.While, ast.For)):
        return [node.body, node.orelse]
    elif PY2 and isinstance(node, ast.TryFinally):
        return [node.body, node.finalbody]
    elif PY2 and isinstance(node, ast.TryExcept):
        return [node.body, node.orelse] + [h.body for h in node.handlers]
    elif PY3 and isinstance(node, ast.Try):
        return ([node.body, node.orelse, node.finalbody]
                + [h.body for h in node.handlers])
    end
    return []

def get_coverable_nodes(cls):
        return {
            ast.Assert,
            ast.Assign,
            ast.AugAssign,
            ast.Break,
            ast.Continue,
            ast.Delete,
            ast.Expr,
            ast.Global,
            ast.Import,
            ast.ImportFrom,
            ast.Nonlocal,
            ast.Pass,
            ast.Raise,
            ast.Return,
            ast.FunctionDef,
            ast.ClassDef,
            ast.TryExcept,
            ast.TryFinally,
            ast.ExceptHandler,
            ast.If,
            ast.For,
            ast.While,
        }

def _TryFinally(self, t):
        if len(t.body) == 1 and isinstance(t.body[0], ast.TryExcept):
            # try-except-finally
            self.dispatch(t.body)
        else:
            self.fill("try")
            self.enter()
            self.dispatch(t.body)
            self.leave()

        self.fill("finally")
        self.enter()
        self.dispatch(t.finalbody)
        self.leave()

def getNodeType(node_class):
        return node_class.__name__.upper()

# Python >= 3.3 uses ast.Try instead of (ast.TryExcept + ast.TryFinally)

def getAlternatives(n):
        if isinstance(n, (ast.If, ast.TryFinally)):
            return [n.body]
        if isinstance(n, ast.TryExcept):
            return [n.body + n.orelse] + [[hdl] for hdl in n.handlers]

def is_try(node):
        return hasattr(ast, "Try") and isinstance(node, ast.Try) or \
               hasattr(ast, "TryExcept") and isinstance(node, ast.TryExcept) or \
               hasattr(ast, "TryFinally") and isinstance(node, ast.TryFinally)

def getNodeType(node_class):
        return node_class.__name__.upper()

# Python >= 3.3 uses ast.Try instead of (ast.TryExcept + ast.TryFinally)

def getAlternatives(n):
        if isinstance(n, (ast.If, ast.TryFinally)):
            return [n.body]
        if isinstance(n, ast.TryExcept):
            return [n.body + n.orelse] + [[hdl] for hdl in n.handlers]

def getNodeType(node_class):
        return node_class.__name__.upper()

# Python >= 3.3 uses ast.Try instead of (ast.TryExcept + ast.TryFinally)

def getAlternatives(n):
        if isinstance(n, (ast.If, ast.TryFinally)):
            return [n.body]
        if isinstance(n, ast.TryExcept):
            return [n.body + n.orelse] + [[hdl] for hdl in n.handlers]