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

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

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

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: ...

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: ...

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: ...

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: ...

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

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: ...

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
 

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: ...

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