diff --git a/builtins/2.7/_ast.pyi b/builtins/2.7/_ast.pyi
new file mode 100644
index 000000000..a82350bfd
--- /dev/null
+++ b/builtins/2.7/_ast.pyi
@@ -0,0 +1,513 @@
+from typing import Any, Tuple
+
+PyCF_ONLY_AST = ...  # type: int
+
+class AST(object):
+    _attributes = ...  # type: Tuple[str]
+    _fields = ...  # type: Tuple[str]
+    def __init__(self, *args, **kwargs) -> None: pass
+
+class alias(AST):
+    pass
+
+class arguments(AST):
+    pass
+
+class boolop(AST):
+    pass
+
+class cmpop(AST):
+    pass
+
+class comprehension(AST):
+    pass
+
+class excepthandler(AST):
+    pass
+
+class expr(AST):
+    pass
+
+class expr_context(AST):
+    pass
+
+class keyword(AST):
+    pass
+
+class mod(AST):
+    pass
+
+class operator(AST):
+    pass
+
+class slice(AST):
+    pass
+
+class stmt(AST):
+    pass
+
+class unaryop(AST):
+    pass
+
+
+class Add(operator):
+    def __init__(self):
+        pass
+
+class And(boolop):
+    def __init__(self):
+        pass
+
+class Assert(stmt):
+    test = ...  # type: Any
+    msg = ...  # type: Any
+    def __init__(self, test = ..., msg = ...):
+        pass
+
+class Assign(stmt):
+    targets = ...  # type: Any
+    value = ...  # type: Any
+    def __init__(self, targets = ..., value = ...):
+        pass
+
+class Attribute(expr):
+    value = ...  # type: Any
+    attr = ...  # type: Any
+    ctx = ...  # type: Any
+    def __init__(self, value = ..., attr = ..., ctx = ...):
+        pass
+
+class AugAssign(stmt):
+    target = ...  # type: Any
+    op = ...  # type: Any
+    value = ...  # type: Any
+    def __init__(self, target = ..., op = ..., value = ...):
+        pass
+
+class AugLoad(expr_context):
+    def __init__(self):
+        pass
+
+class AugStore(expr_context):
+    def __init__(self):
+        pass
+
+class BinOp(expr):
+    left = ...  # type: Any
+    op = ...  # type: Any
+    right = ...  # type: Any
+    def __init__(self, left = ..., op = ..., right = ...):
+        pass
+
+class BitAnd(operator):
+    def __init__(self):
+        pass
+
+class BitOr(operator):
+    def __init__(self):
+        pass
+
+class BitXor(operator):
+    def __init__(self):
+        pass
+
+class BoolOp(expr):
+    op = ...  # type: Any
+    values = ...  # type: Any
+    def __init__(self, op = ..., values = ...):
+        pass
+
+class Break(stmt):
+    def __init__(self):
+        pass
+
+class Call(expr):
+    func = ...  # type: Any
+    args = ...  # type: Any
+    keywords = ...  # type: Any
+    starargs = ...  # type: Any
+    kwargs = ...  # type: Any
+    def __init__(self, func = ..., args = ..., keywords = ..., starargs = ..., kwargs = ...):
+        pass
+
+class ClassDef(stmt):
+    name = ...  # type: Any
+    bases = ...  # type: Any
+    body = ...  # type: Any
+    decorator_list = ...  # type: Any
+    def __init__(self, name = ..., bases = ..., body = ..., decorator_list = ...):
+        pass
+
+class Compare(expr):
+    left = ...  # type: Any
+    ops = ...  # type: Any
+    comparators = ...  # type: Any
+    def __init__(self, left = ..., ops = ..., comparators = ...):
+        pass
+
+class Continue(stmt):
+    def __init__(self):
+        pass
+
+class Del(expr_context):
+    def __init__(self):
+        pass
+
+class Delete(stmt):
+    targets = ...  # type: Any
+    def __init__(self, targets = ...):
+        pass
+
+class Dict(expr):
+    keys = ...  # type: Any
+    values = ...  # type: Any
+    def __init__(self, keys = ..., values = ...):
+        pass
+
+class DictComp(expr):
+    key = ...  # type: Any
+    value = ...  # type: Any
+    generators = ...  # type: Any
+    def __init__(self, key = ..., value = ..., generators = ...):
+        pass
+
+class Div(operator):
+    def __init__(self):
+        pass
+
+class Ellipsis(slice):
+    def __init__(self):
+        pass
+
+class Eq(cmpop):
+    def __init__(self):
+        pass
+
+class ExceptHandler(excepthandler):
+    type = ...  # type: Any
+    name = ...  # type: Any
+    body = ...  # type: Any
+    def __init__(self, type = ..., name = ..., body = ...):
+        pass
+
+class Exec(stmt):
+    body = ...  # type: Any
+    globals = ...  # type: Any
+    locals = ...  # type: Any
+    def __init__(self, body = ..., globals = ..., locals = ...):
+        pass
+
+class Expr(stmt):
+    value = ...  # type: Any
+    def __init__(self, value = ...):
+        pass
+
+class Expression(mod):
+    body = ...  # type: Any
+    def __init__(self, body = ...):
+        pass
+
+class ExtSlice(slice):
+    dims = ...  # type: Any
+    def __init__(self, dims = ...):
+        pass
+
+class FloorDiv(operator):
+    def __init__(self):
+        pass
+
+class For(stmt):
+    target = ...  # type: Any
+    iter = ...  # type: Any
+    body = ...  # type: Any
+    orelse = ...  # type: Any
+    def __init__(self, target = ..., iter = ..., body = ..., orelse = ...):
+        pass
+
+class FunctionDef(stmt):
+    name = ...  # type: Any
+    args = ...  # type: Any
+    body = ...  # type: Any
+    decorator_list = ...  # type: Any
+    def __init__(self, name = ..., args = ..., body = ..., decorator_list = ...):
+        pass
+
+class GeneratorExp(expr):
+    elt = ...  # type: Any
+    generators = ...  # type: Any
+    def __init__(self, elt = ..., generators = ...):
+        pass
+
+class Global(stmt):
+    names = ...  # type: Any
+    def __init__(self, names = ...):
+        pass
+
+class Gt(cmpop):
+    def __init__(self):
+        pass
+
+class GtE(cmpop):
+    def __init__(self):
+        pass
+
+class If(stmt):
+    test = ...  # type: Any
+    body = ...  # type: Any
+    orelse = ...  # type: Any
+    def __init__(self, test = ..., body = ..., orelse = ...):
+        pass
+
+class IfExp(expr):
+    test = ...  # type: Any
+    body = ...  # type: Any
+    orelse = ...  # type: Any
+    def __init__(self, test = ..., body = ..., orelse = ...):
+        pass
+
+class Import(stmt):
+    names = ...  # type: Any
+    def __init__(self, names = ...):
+        pass
+
+class ImportFrom(stmt):
+    module = ...  # type: Any
+    names = ...  # type: Any
+    level = ...  # type: Any
+    def __init__(self, module = ..., names = ..., level = ...):
+        pass
+
+class In(cmpop):
+    def __init__(self):
+        pass
+
+class Index(slice):
+    value = ...  # type: Any
+    def __init__(self, value = ...):
+        pass
+
+class Interactive(mod):
+    body = ...  # type: Any
+    def __init__(self, body = ...):
+        pass
+
+class Invert(unaryop):
+    def __init__(self):
+        pass
+
+class Is(cmpop):
+    def __init__(self):
+        pass
+
+class IsNot(cmpop):
+    def __init__(self):
+        pass
+
+class LShift(operator):
+    def __init__(self):
+        pass
+
+class Lambda(expr):
+    args = ...  # type: Any
+    body = ...  # type: Any
+    def __init__(self, args = ..., body = ...):
+        pass
+
+class List(expr):
+    elts = ...  # type: Any
+    ctx = ...  # type: Any
+    def __init__(self, elts = ..., ctx = ...):
+        pass
+
+class ListComp(expr):
+    elt = ...  # type: Any
+    generators = ...  # type: Any
+    def __init__(self, elt = ..., generators = ...):
+        pass
+
+class Load(expr_context):
+    def __init__(self):
+        pass
+
+class Lt(cmpop):
+    def __init__(self):
+        pass
+
+class LtE(cmpop):
+    def __init__(self):
+        pass
+
+class Mod(operator):
+    def __init__(self):
+        pass
+
+class Module(mod):
+    body = ...  # type: Any
+    def __init__(self, body = ...):
+        pass
+
+class Mult(operator):
+    def __init__(self):
+        pass
+
+class Name(expr):
+    id = ...  # type: Any
+    ctx = ...  # type: Any
+    def __init__(self, id = ..., ctx = ...):
+        pass
+
+class Not(unaryop):
+    def __init__(self):
+        pass
+
+class NotEq(cmpop):
+    def __init__(self):
+        pass
+
+class NotIn(cmpop):
+    def __init__(self):
+        pass
+
+class Num(expr):
+    n = ...  # type: Any
+    def __init__(self, n = ...):
+        pass
+
+class Or(boolop):
+    def __init__(self):
+        pass
+
+class Param(expr_context):
+    def __init__(self):
+        pass
+
+class Pass(stmt):
+    def __init__(self):
+        pass
+
+class Pow(operator):
+    def __init__(self):
+        pass
+
+class Print(stmt):
+    dest = ...  # type: Any
+    values = ...  # type: Any
+    nl = ...  # type: Any
+    def __init__(self, dest = ..., values = ..., nl = ...):
+        pass
+
+class RShift(operator):
+    def __init__(self):
+        pass
+
+class Raise(stmt):
+    type = ...  # type: Any
+    inst = ...  # type: Any
+    tback = ...  # type: Any
+    def __init__(self, type = ..., inst = ..., tback = ...):
+        pass
+
+class Repr(expr):
+    value = ...  # type: Any
+    def __init__(self, value = ...):
+        pass
+
+class Return(stmt):
+    value = ...  # type: Any
+    def __init__(self, value = ...):
+        pass
+
+class Set(expr):
+    elts = ...  # type: Any
+    def __init__(self, elts = ...):
+        pass
+
+class SetComp(expr):
+    elt = ...  # type: Any
+    generators = ...  # type: Any
+    def __init__(self, elt = ..., generators = ...):
+        pass
+
+class Slice(slice):
+    lower = ...  # type: Any
+    upper = ...  # type: Any
+    step = ...  # type: Any
+    def __init__(self, lower = ..., upper = ..., step = ...):
+        pass
+
+class Store(expr_context):
+    def __init__(self):
+        pass
+
+class Str(expr):
+    s = ...  # type: Any
+    def __init__(self, s = ...):
+        pass
+
+class Sub(operator):
+    def __init__(self):
+        pass
+
+class Subscript(expr):
+    value = ...  # type: Any
+    slice = ...  # type: Any
+    ctx = ...  # type: Any
+    def __init__(self, value = ..., slice = ..., ctx = ...):
+        pass
+
+class Suite(mod):
+    body = ...  # type: Any
+    def __init__(self, body = ...):
+        pass
+
+class TryExcept(stmt):
+    body = ...  # type: Any
+    handlers = ...  # type: Any
+    orelse = ...  # type: Any
+    def __init__(self, body = ..., handlers = ..., orelse = ...):
+        pass
+
+class TryFinally(stmt):
+    body = ...  # type: Any
+    finalbody = ...  # type: Any
+    def __init__(self, body = ..., finalbody = ...):
+        pass
+
+class Tuple(expr):
+    elts = ...  # type: Any
+    ctx = ...  # type: Any
+    def __init__(self, elts = ..., ctx = ...):
+        pass
+
+class UAdd(unaryop):
+    def __init__(self):
+        pass
+
+class USub(unaryop):
+    def __init__(self):
+        pass
+
+class UnaryOp(expr):
+    op = ...  # type: Any
+    operand = ...  # type: Any
+    def __init__(self, op = ..., operand = ...):
+        pass
+
+class While(stmt):
+    test = ...  # type: Any
+    body = ...  # type: Any
+    orelse = ...  # type: Any
+    def __init__(self, test = ..., body = ..., orelse = ...):
+        pass
+
+class With(stmt):
+    context_expr = ...  # type: Any
+    optional_vars = ...  # type: Any
+    body = ...  # type: Any
+    def __init__(self, context_expr = ..., optional_vars = ..., body = ...):
+        pass
+
+class Yield(expr):
+    value = ...  # type: Any
+    def __init__(self, value = ...):
+        pass