Use explicit "# type: str" instead of '' shortcut.

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): ...

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

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: ...

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): ...

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]
 

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: ...

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