diff --git a/builtins/2.7/__builtin__.pyi b/builtins/2.7/__builtin__.pyi
index b558a03bb..d57c2fe34 100644
--- a/builtins/2.7/__builtin__.pyi
+++ b/builtins/2.7/__builtin__.pyi
@@ -24,7 +24,7 @@ classmethod = object()  # Special, only valid as a decorator.
 property = object()
 
 class object:
-    __doc__ = ''
+    __doc__ = ...  # type: str
     __class__ = ...  # type: type
 
     def __init__(self) -> None: ...
@@ -35,8 +35,8 @@ class object:
     def __hash__(self) -> int: ...
 
 class type:
-    __name__ = ''
-    __module__ = ''
+    __name__ = ...  # type: str
+    __module__ = ...  # type: str
     __dict__ = ...  # type: Dict[unicode, Any]
 
     @overload
@@ -461,8 +461,8 @@ class tuple(Sequence[_T_co], Generic[_T_co]):
 
 class function:
     # TODO name of the class (corresponds to Python 'function' class)
-    __name__ = ''
-    __module__ = ''
+    __name__ = ...  # type: str
+    __module__ = ...  # type: str
 
 class list(MutableSequence[_T], Reversible[_T], Generic[_T]):
     @overload
@@ -594,8 +594,8 @@ class xrange(Sized, Iterable[int], Reversible[int]):
     def __reversed__(self) -> Iterator[int]: ...
 
 class module:
-    __name__ = ''
-    __file__ = ''
+    __name__ = ...  # type: str
+    __file__ = ...  # type: str
     __dict__ = ...  # type: Dict[unicode, Any]
 
 True = ...  # type: bool
@@ -757,8 +757,9 @@ class ArithmeticError(StandardError): ...
 class BufferError(StandardError): ...
 class EnvironmentError(StandardError):
     errno = 0
-    strerror = ''
-    filename = '' # TODO can this be unicode?
+    strerror = ...  # type: str
+    # TODO can this be unicode?
+    filename = ...  # type: str
 class LookupError(StandardError): ...
 class RuntimeError(StandardError): ...
 class ValueError(StandardError): ...
diff --git a/builtins/2.7/sys.pyi b/builtins/2.7/sys.pyi
index 40b064b00..04994b25f 100644
--- a/builtins/2.7/sys.pyi
+++ b/builtins/2.7/sys.pyi
@@ -40,7 +40,7 @@ class _version_info(Tuple[int, int, int, str, int]):
     major = 0
     minor = 0
     micro = 0
-    releaselevel = ''
+    releaselevel = ...  # type: str
     serial = 0
 
 _mercurial = ...  # type: Tuple[str, str, str]
@@ -75,8 +75,8 @@ version = ...  # type: str
 warnoptions = ...  # type: object
 float_info = ...  # type: _float_info
 version_info = ...  # type: _version_info
-ps1 = ''
-ps2 = ''
+ps1 = ...  # type: str
+ps2 = ...  # type: str
 last_type = ...  # type: type
 last_value = ...  # type: BaseException
 last_traceback = ...  # type: TracebackType
diff --git a/builtins/3/array.pyi b/builtins/3/array.pyi
index 2f4778f1c..495ba68c5 100644
--- a/builtins/3/array.pyi
+++ b/builtins/3/array.pyi
@@ -4,12 +4,12 @@
 
 from typing import Any, Iterable, Tuple, List, Iterator, BinaryIO, overload
 
-typecodes = ''
+typecodes = ...  # type: str
 
 class array:
     def __init__(self, typecode: str,
                  initializer: Iterable[Any] = None) -> None:
-        typecode = ''
+        typecode = ...  # type: str
         itemsize = 0
 
     def append(self, x: Any) -> None: ...
diff --git a/builtins/3/builtins.pyi b/builtins/3/builtins.pyi
index df5359568..32ea71f2a 100644
--- a/builtins/3/builtins.pyi
+++ b/builtins/3/builtins.pyi
@@ -26,7 +26,7 @@ classmethod = object() # Only valid as a decorator.
 property = object()
 
 class object:
-    __doc__ = ''
+    __doc__ = ...  # type: str
     __class__ = ...  # type: type
 
     def __init__(self) -> None: ...
@@ -37,9 +37,9 @@ class object:
     def __hash__(self) -> int: ...
 
 class type:
-    __name__ = ''
-    __qualname__ = ''
-    __module__ = ''
+    __name__ = ...  # type: str
+    __qualname__ = ...  # type: str
+    __module__ = ...  # type: str
     __dict__ = ...  # type: Dict[str, Any]
 
     def __init__(self, o: object) -> None: ...
@@ -431,9 +431,9 @@ class tuple(Sequence[_T_co], Generic[_T_co]):
 
 class function:
     # TODO not defined in builtins!
-    __name__ = ''
-    __qualname__ = ''
-    __module__ = ''
+    __name__ = ...  # type: str
+    __qualname__ = ...  # type: str
+    __module__ = ...  # type: str
     __code__ = ... # type: Any
 
 class list(MutableSequence[_T], Reversible[_T], Generic[_T]):
@@ -595,8 +595,8 @@ class range(Sequence[int], Reversible[int]):
 
 class module:
     # TODO not defined in builtins!
-    __name__ = ''
-    __file__ = ''
+    __name__ = ...  # type: str
+    __file__ = ...  # type: str
     __dict__ = ...  # type: Dict[str, Any]
 
 True = ...  # type: bool
@@ -732,8 +732,9 @@ class Exception(BaseException): ...
 class ArithmeticError(Exception): ...
 class EnvironmentError(Exception):
     errno = 0
-    strerror = ''
-    filename = ''  # TODO can this be bytes?
+    strerror = ...  # type: str
+    # TODO can this be bytes?
+    filename = ...  # type: str
 class LookupError(Exception): ...
 class RuntimeError(Exception): ...
 class ValueError(Exception): ...
diff --git a/builtins/3/grp.pyi b/builtins/3/grp.pyi
index 2630f5517..ad14951b7 100644
--- a/builtins/3/grp.pyi
+++ b/builtins/3/grp.pyi
@@ -3,8 +3,8 @@ from typing import List
 # TODO group database entry object type
 
 class struct_group:
-    gr_name = ''
-    gr_passwd = ''
+    gr_name = ...  # type: str
+    gr_passwd = ...  # type: str
     gr_gid = 0
     gr_mem = ...  # type: List[str]
 
diff --git a/builtins/3/pwd.pyi b/builtins/3/pwd.pyi
index 942566269..a5a8171c3 100644
--- a/builtins/3/pwd.pyi
+++ b/builtins/3/pwd.pyi
@@ -6,13 +6,13 @@ import typing
 
 class struct_passwd:
     # TODO use namedtuple
-    pw_name = ''
-    pw_passwd = ''
+    pw_name = ...  # type: str
+    pw_passwd = ...  # type: str
     pw_uid = 0
     pw_gid = 0
-    pw_gecos = ''
-    pw_dir = ''
-    pw_shell = ''
+    pw_gecos = ...  # type: str
+    pw_dir = ...  # type: str
+    pw_shell = ...  # type: str
 
 def getpwuid(uid: int) -> struct_passwd: ...
 def getpwnam(name: str) -> struct_passwd: ...
diff --git a/builtins/3/sys.pyi b/builtins/3/sys.pyi
index 93e0791fb..a7e4cfe21 100644
--- a/builtins/3/sys.pyi
+++ b/builtins/3/sys.pyi
@@ -9,18 +9,18 @@ from typing import (
 from types import TracebackType
 
 # ----- sys variables -----
-abiflags = ''
+abiflags = ...  # type: str
 argv = ... # type: List[str]
-byteorder = ''
+byteorder = ...  # type: str
 builtin_module_names = ... # type: Sequence[str] # actually a tuple of strings
-copyright = ''
+copyright = ...  # type: str
 #dllhandle = 0  # Windows only
 dont_write_bytecode = False
 __displayhook__ = ... # type: Any # contains the original value of displayhook
 __excepthook__ = ... # type: Any  # contains the original value of excepthook
-exec_prefix = ''
-executable = ''
-float_repr_style = ''
+exec_prefix = ...  # type: str
+executable = ...  # type: str
+float_repr_style = ...  # type: str
 hexversion = 0  # this is a 32-bit int
 last_type = ... # type: Any
 last_value = ... # type: Any
@@ -32,10 +32,10 @@ modules = ... # type: Dict[str, Any]
 path = ... # type: List[str]
 path_hooks = ... # type: List[Any] # TODO precise type; function, path to finder
 path_importer_cache = ... # type: Dict[str, Any] # TODO precise type
-platform = ''
-prefix = ''
-ps1 = ''
-ps2 = ''
+platform = ...  # type: str
+prefix = ...  # type: str
+ps1 = ...  # type: str
+ps2 = ...  # type: str
 stdin = ... # type: TextIO
 stdout = ... # type: TextIO
 stderr = ... # type: TextIO
@@ -45,7 +45,7 @@ __stderr__ = ... # type: TextIO
 # deprecated and removed in Python 3.3:
 subversion = ... # type: Tuple[str, str, str]
 tracebacklimit = 0
-version = ''
+version = ...  # type: str
 api_version = 0
 warnoptions = ... # type: Any
 #  Each entry is a tuple of the form (action, message, category, module,
@@ -102,7 +102,7 @@ class _version_info(Tuple[int, int, int, str, int]):
     major = 0
     minor = 0
     micro = 0
-    releaselevel = ''
+    releaselevel = ...  # type: str
     serial = 0
 version_info = ... # type: _version_info
 
diff --git a/stdlib/2.7/os/path.pyi b/stdlib/2.7/os/path.pyi
index f77ed8c96..e0a0f978c 100644
--- a/stdlib/2.7/os/path.pyi
+++ b/stdlib/2.7/os/path.pyi
@@ -9,14 +9,14 @@ from typing import overload, List, Any, Tuple, BinaryIO, TextIO, TypeVar, Callab
 # ----- os.path variables -----
 supports_unicode_filenames = False
 # aliases (also in os)
-curdir = ''
-pardir = ''
-sep = ''
-altsep = ''
-extsep = ''
-pathsep = ''
-defpath = ''
-devnull = ''
+curdir = ...  # type: str
+pardir = ...  # type: str
+sep = ...  # type: str
+altsep = ...  # type: str
+extsep = ...  # type: str
+pathsep = ...  # type: str
+defpath = ...  # type: str
+devnull = ...  # type: str
 
 # ----- os.path function stubs -----
 def abspath(path: AnyStr) -> AnyStr: ...
diff --git a/stdlib/2.7/string.pyi b/stdlib/2.7/string.pyi
index 5142a881b..25c623676 100644
--- a/stdlib/2.7/string.pyi
+++ b/stdlib/2.7/string.pyi
@@ -4,18 +4,18 @@
 
 from typing import Mapping, Sequence, Any, Optional, Union, List, Tuple, Iterable, AnyStr
 
-ascii_letters = ''
-ascii_lowercase = ''
-ascii_uppercase = ''
-digits = ''
-hexdigits = ''
-letters = ''
-lowercase = ''
-octdigits = ''
-punctuation = ''
-printable = ''
-uppercase = ''
-whitespace = ''
+ascii_letters = ...  # type: str
+ascii_lowercase = ...  # type: str
+ascii_uppercase = ...  # type: str
+digits = ...  # type: str
+hexdigits = ...  # type: str
+letters = ...  # type: str
+lowercase = ...  # type: str
+octdigits = ...  # type: str
+punctuation = ...  # type: str
+printable = ...  # type: str
+uppercase = ...  # type: str
+whitespace = ...  # type: str
 
 def capwords(s: AnyStr, sep: AnyStr = None) -> AnyStr: ...
 # TODO: originally named 'from'
@@ -49,7 +49,7 @@ def replace(s: AnyStr, old: AnyStr, new: AnyStr, maxreplace: int = None) -> AnyS
 
 class Template(object):
     # TODO: Unicode support?
-    template = ''
+    template = ...  # type: str
 
     def __init__(self, template: str) -> None: ...
     def substitute(self, mapping: Mapping[str, str], **kwds: str) -> str: ...
diff --git a/stdlib/2.7/subprocess.pyi b/stdlib/2.7/subprocess.pyi
index 36f3dc9d0..e8626b9c4 100644
--- a/stdlib/2.7/subprocess.pyi
+++ b/stdlib/2.7/subprocess.pyi
@@ -26,8 +26,8 @@ STDOUT = ... # type: int
 
 class CalledProcessError(Exception):
     returncode = 0
-    cmd = ''
-    output = '' # May be None
+    cmd = ...  # type: str
+    output = ...  # type: str # May be None
 
     def __init__(self, returncode: int, cmd: str, output: str) -> None: ...
 
diff --git a/stdlib/2.7/tempfile.pyi b/stdlib/2.7/tempfile.pyi
index f8032ea18..fb43a8801 100644
--- a/stdlib/2.7/tempfile.pyi
+++ b/stdlib/2.7/tempfile.pyi
@@ -7,8 +7,8 @@
 from typing import Tuple, IO
 
 # global variables
-tempdir = ''
-template = ''
+tempdir = ...  # type: str
+template = ...  # type: str
 
 # TODO text files
 
@@ -26,7 +26,7 @@ def SpooledTemporaryFile(
     ...
 
 class TemporaryDirectory:
-    name = ''
+    name = ...  # type: str
     def __init__(self, suffix: str = '', prefix: str = 'tmp',
                  dir: str = None) -> None: ...
     def cleanup(self) -> None: ...
diff --git a/stdlib/2.7/threading.pyi b/stdlib/2.7/threading.pyi
index 91089bded..a7eada318 100644
--- a/stdlib/2.7/threading.pyi
+++ b/stdlib/2.7/threading.pyi
@@ -10,7 +10,7 @@ def currentThread() -> Thread: ...
 def enumerate() -> List[Thread]: ...
 
 class Thread(object):
-    name = ''
+    name = ...  # type: str
     ident = 0
     daemon = False
 
diff --git a/stdlib/2.7/urlparse.pyi b/stdlib/2.7/urlparse.pyi
index 832b955b7..ce447dc5e 100644
--- a/stdlib/2.7/urlparse.pyi
+++ b/stdlib/2.7/urlparse.pyi
@@ -8,7 +8,7 @@ uses_params = []  # type: List[str]
 non_hierarchical = []  # type: List[str]
 uses_query = []  # type: List[str]
 uses_fragment = []  # type: List[str]
-scheme_chars = ''
+scheme_chars = ...  # type: str
 MAX_CACHE_SIZE = 0
 
 def clear_cache() -> None: ...
diff --git a/stdlib/3.4/asyncio/futures.pyi b/stdlib/3.4/asyncio/futures.pyi
index fb21cd682..ad1bd32a9 100644
--- a/stdlib/3.4/asyncio/futures.pyi
+++ b/stdlib/3.4/asyncio/futures.pyi
@@ -18,7 +18,7 @@ class _TracebackLogger:
     def __del__(self) -> None: ...
 
 class Future(Iterator[_T], Generic[_T]):
-    _state = ''
+    _state = ...  # type: str
     _exception = Any #Exception
     _blocking = False
     _log_traceback = False
diff --git a/stdlib/3.4/enum.pyi b/stdlib/3.4/enum.pyi
index 8cd5757b1..dcb3b9c94 100644
--- a/stdlib/3.4/enum.pyi
+++ b/stdlib/3.4/enum.pyi
@@ -9,7 +9,7 @@ class Enum:
     def __hash__(self) -> Any: ...
     def __reduce_ex__(self, proto: Any) -> Any: ...
 
-    name = ''
+    name = ...  # type: str
     value = None  # type: Any
 
 class IntEnum(int, Enum): ...
diff --git a/stdlib/3/getopt.pyi b/stdlib/3/getopt.pyi
index 6b37e79b7..169c4e1d5 100644
--- a/stdlib/3/getopt.pyi
+++ b/stdlib/3/getopt.pyi
@@ -13,7 +13,7 @@ def gnu_getopt(args: List[str], shortopts: str,
                                              List[str]]: ...
 
 class GetoptError(Exception):
-    msg = ''
-    opt = ''
+    msg = ...  # type: str
+    opt = ...  # type: str
 
 error = GetoptError
diff --git a/stdlib/3/os/__init__.pyi b/stdlib/3/os/__init__.pyi
index b6113bb34..fc00a3540 100644
--- a/stdlib/3/os/__init__.pyi
+++ b/stdlib/3/os/__init__.pyi
@@ -46,15 +46,15 @@ O_DIRECTORY = 0  # Gnu extension if in C library
 O_NOFOLLOW = 0   # Gnu extension if in C library
 O_NOATIME = 0    # Gnu extension if in C library
 
-curdir = ''
-pardir = ''
-sep = ''
-altsep = ''
-extsep = ''
-pathsep = ''
-defpath = ''
-linesep = ''
-devnull = ''
+curdir = ...  # type: str
+pardir = ...  # type: str
+sep = ...  # type: str
+altsep = ...  # type: str
+extsep = ...  # type: str
+pathsep = ...  # type: str
+defpath = ...  # type: str
+linesep = ...  # type: str
+devnull = ...  # type: str
 
 F_OK = 0
 R_OK = 0
diff --git a/stdlib/3/os/path.pyi b/stdlib/3/os/path.pyi
index cbb86d1d6..3674dc4ca 100644
--- a/stdlib/3/os/path.pyi
+++ b/stdlib/3/os/path.pyi
@@ -8,14 +8,14 @@ from typing import overload, List, Any, AnyStr, Tuple, BinaryIO, TextIO
 # ----- os.path variables -----
 supports_unicode_filenames = False
 # aliases (also in os)
-curdir = ''
-pardir = ''
-sep = ''
-altsep = ''
-extsep = ''
-pathsep = ''
-defpath = ''
-devnull = ''
+curdir = ...  # type: str
+pardir = ...  # type: str
+sep = ...  # type: str
+altsep = ...  # type: str
+extsep = ...  # type: str
+pathsep = ...  # type: str
+defpath = ...  # type: str
+devnull = ...  # type: str
 
 # ----- os.path function stubs -----
 def abspath(path: AnyStr) -> AnyStr: ...
diff --git a/stdlib/3/shlex.pyi b/stdlib/3/shlex.pyi
index 431d20a8e..cb9acb8fe 100644
--- a/stdlib/3/shlex.pyi
+++ b/stdlib/3/shlex.pyi
@@ -11,20 +11,20 @@ def split(s: str, comments: bool = False,
 def quote(s: str) -> str: ...
 
 class shlex:
-    commenters = ''
-    wordchars = ''
-    whitespace = ''
-    escape = ''
-    quotes = ''
-    escapedquotes = ''
-    whitespace_split = ''
-    infile = ''
+    commenters = ...  # type: str
+    wordchars = ...  # type: str
+    whitespace = ...  # type: str
+    escape = ...  # type: str
+    quotes = ...  # type: str
+    escapedquotes = ...  # type: str
+    whitespace_split = ...  # type: str
+    infile = ...  # type: str
     instream = ...  # type: TextIO
-    source = ''
+    source = ...  # type: str
     debug = 0
     lineno = 0
-    token = ''
-    eof = ''
+    token = ...  # type: str
+    eof = ...  # type: str
 
     def __init__(self, instream=None, infile=None,
                  posix: bool = False) -> None: ...
diff --git a/stdlib/3/string.pyi b/stdlib/3/string.pyi
index 4ce4b33d8..716eb7abf 100644
--- a/stdlib/3/string.pyi
+++ b/stdlib/3/string.pyi
@@ -4,20 +4,20 @@
 
 from typing import Mapping
 
-ascii_letters = ''
-ascii_lowercase = ''
-ascii_uppercase = ''
-digits = ''
-hexdigits = ''
-octdigits = ''
-punctuation = ''
-printable = ''
-whitespace = ''
+ascii_letters = ...  # type: str
+ascii_lowercase = ...  # type: str
+ascii_uppercase = ...  # type: str
+digits = ...  # type: str
+hexdigits = ...  # type: str
+octdigits = ...  # type: str
+punctuation = ...  # type: str
+printable = ...  # type: str
+whitespace = ...  # type: str
 
 def capwords(s: str, sep: str = None) -> str: ...
 
 class Template:
-    template = ''
+    template = ...  # type: str
 
     def __init__(self, template: str) -> None: ...
     def substitute(self, mapping: Mapping[str, str], **kwds: str) -> str: ...
diff --git a/stdlib/3/subprocess.pyi b/stdlib/3/subprocess.pyi
index 142940419..57c4a3bf4 100644
--- a/stdlib/3/subprocess.pyi
+++ b/stdlib/3/subprocess.pyi
@@ -26,7 +26,7 @@ STDOUT = ... # type: Any
 
 class CalledProcessError(Exception):
     returncode = 0
-    cmd = ''
+    cmd = ...  # type: str
     output = b'' # May be None
 
     def __init__(self, returncode: int, cmd: str, output: str) -> None: ...
diff --git a/stdlib/3/tarfile.pyi b/stdlib/3/tarfile.pyi
index 519075b07..b7bb0ee9c 100644
--- a/stdlib/3/tarfile.pyi
+++ b/stdlib/3/tarfile.pyi
@@ -5,7 +5,7 @@ from typing import Any, List, overload, Callable
 class TarError(Exception): ...
 
 class TarInfo:
-    name = ''
+    name = ...  # type: str
     size = 0
     uid = 0
     gid = 0
diff --git a/stdlib/3/tempfile.pyi b/stdlib/3/tempfile.pyi
index 1b3a123b5..261fd4b37 100644
--- a/stdlib/3/tempfile.pyi
+++ b/stdlib/3/tempfile.pyi
@@ -6,8 +6,8 @@
 from typing import Tuple, BinaryIO
 
 # global variables
-tempdir = ''
-template = ''
+tempdir = ...  # type: str
+template = ...  # type: str
 
 # TODO text files
 
@@ -29,7 +29,7 @@ def SpooledTemporaryFile(
     ...
 
 class TemporaryDirectory:
-    name = ''
+    name = ...  # type: str
     def __init__(self, suffix: str = '', prefix: str = 'tmp',
                  dir: str = None) -> None: ...
     def cleanup(self) -> None: ...
diff --git a/stdlib/3/threading.pyi b/stdlib/3/threading.pyi
index c3d86729c..e52c2b5fc 100644
--- a/stdlib/3/threading.pyi
+++ b/stdlib/3/threading.pyi
@@ -5,7 +5,7 @@
 from typing import Any, Dict, Optional, Callable, TypeVar, Union
 
 class Thread:
-    name = ''
+    name = ...  # type: str
     ident = 0
     daemon = False
 
diff --git a/stdlib/3/unittest.pyi b/stdlib/3/unittest.pyi
index eb4a50e63..5e2ad90c6 100644
--- a/stdlib/3/unittest.pyi
+++ b/stdlib/3/unittest.pyi
@@ -45,7 +45,7 @@ class TestResult:
 class _AssertRaisesBaseContext:
     expected = ... # type: Any
     failureException = ... # type: type
-    obj_name = ''
+    obj_name = ...  # type: str
     expected_regex = ... # type: Pattern[str]
 
 class _AssertRaisesContext(_AssertRaisesBaseContext):
@@ -55,7 +55,7 @@ class _AssertRaisesContext(_AssertRaisesBaseContext):
 
 class _AssertWarnsContext(_AssertRaisesBaseContext):
     warning = ... # type: Any # TODO precise type
-    filename = ''
+    filename = ...  # type: str
     lineno = 0
     def __enter__(self) -> _AssertWarnsContext: ...
     def __exit__(self, exc_type, exc_value, tb) -> bool: ...
diff --git a/stdlib/3/zipfile.pyi b/stdlib/3/zipfile.pyi
index 9d6a7f4dd..e98759b0c 100644
--- a/stdlib/3/zipfile.pyi
+++ b/stdlib/3/zipfile.pyi
@@ -8,7 +8,7 @@ ZIP_DEFLATED = 0
 def is_zipfile(filename: Union[str, BinaryIO]) -> bool: ...
 
 class ZipInfo:
-    filename = ''
+    filename = ...  # type: str
     date_time = ... # type: Tuple[int, int, int, int, int, int]
     compressed_size = 0
     file_size = 0
diff --git a/third_party/2.7/concurrent/futures/__init__.pyi b/third_party/2.7/concurrent/futures/__init__.pyi
index b6b2f8312..a9faeeeb1 100644
--- a/third_party/2.7/concurrent/futures/__init__.pyi
+++ b/third_party/2.7/concurrent/futures/__init__.pyi
@@ -28,8 +28,8 @@ class ProcessPoolExecutor(Executor):
 
 def wait(fs: Iterable[Future], timeout: float = None, return_when: str = None) -> Tuple[Iterable[Future], Iterable[Future]]: ...
 
-FIRST_COMPLETED = ''
-FIRST_EXCEPTION = ''
-ALL_COMPLETED = ''
+FIRST_COMPLETED = ...  # type: str
+FIRST_EXCEPTION = ...  # type: str
+ALL_COMPLETED = ...  # type: str
 
 def as_completed(fs: Iterable[Future], timeout: float = None) -> Iterator[Future]: ...
diff --git a/third_party/2.7/gflags.pyi b/third_party/2.7/gflags.pyi
index 5b2262bf8..54d6eb7d4 100644
--- a/third_party/2.7/gflags.pyi
+++ b/third_party/2.7/gflags.pyi
@@ -67,12 +67,12 @@ class FlagValues:
 FLAGS = None  # type: FlagValues
 
 class Flag:
-    name = ''
+    name = ...  # type: str
     default = None  # type: Any
-    default_as_str = ''
+    default_as_str = ...  # type: str
     value = None  # type: Any
-    help = ''
-    short_name = ''
+    help = ...  # type: str
+    short_name = ...  # type: str
     boolean = False
     present = False
     parser = None  # type: ArgumentParser
@@ -90,7 +90,7 @@ class Flag:
     def WriteInfoInXMLFormat(self, outfile: IO[str], module_name: str, is_key: bool = False, indent: str = '') -> None: ...
 
 class ArgumentParser(object):
-    syntactic_help = ""
+    syntactic_help = ...  # type: str
 # TODO what is this
     def Parse(self, argument: Any) -> Any: ...
     def Type(self) -> str: ...
@@ -149,9 +149,9 @@ class NumericParser(ArgumentParser):
     def Convert(self, argument: Any) -> Any: ...
 
 class FloatParser(NumericParser):
-    number_article = ''
-    number_name = ''
-    syntactic_help = ''
+    number_article = ...  # type: str
+    number_name = ...  # type: str
+    syntactic_help = ...  # type: str
     def __init__(self, lower_bound: float = None, upper_bound: float = None) -> None: ...
     def Convert(self, argument: Any) -> float: ...
     def Type(self) -> str: ...
@@ -160,9 +160,9 @@ def DEFINE_float(name: str, default: float, help: str, lower_bound: float = None
                  upper_bound: float = None, flag_values: FlagValues = ..., **args: Any) -> None: ...
 
 class IntegerParser(NumericParser):
-    number_article = ''
-    number_name = ''
-    syntactic_help = ''
+    number_article = ...  # type: str
+    number_name = ...  # type: str
+    syntactic_help = ...  # type: str
     def __init__(self, lower_bound: int = None, upper_bound: int = None) -> None: ...
     def Convert(self, argument: Any) -> int: ...
     def Type(self) -> str: ...