diff --git a/2.7/binascii.pyi b/2.7/binascii.pyi
new file mode 100644
index 000000000..a7f149909
--- /dev/null
+++ b/2.7/binascii.pyi
@@ -0,0 +1,23 @@
+"""Stubs for the binascii module."""
+
+from typing import Optional
+
+def a2b_base64(string: str) -> str: ...
+def a2b_hex(hexstr: str) -> str: ...
+def a2b_hqx(string: str) -> str: ...
+def a2b_qp(string: str, header: bool = None) -> str: ...
+def a2b_uu(string: str) -> str: ...
+def b2a_base64(data: str) -> str: ...
+def b2a_hex(data: str) -> str: ...
+def b2a_hqx(data: str) -> str: ...
+def b2a_qp(data: str, quotetabs: bool = None, istext: bool = None, header: bool = None) -> str: ...
+def b2a_uu(data: str) -> str: ...
+def crc32(data: str, crc: Optional[int]) -> int: ...
+def crc_hqx(data: str, oldcrc: int) -> int: ...
+def hexlify(data: str) -> str: ...
+def rlecode_hqx(data: str) -> str: ...
+def rledecode_hqx(data: str) -> str: ...
+def unhexlify(hexstr: str) -> str: ...
+
+class Error(Exception): ...
+class Incomplete(Exception): ...
diff --git a/2.7/errno.pyi b/2.7/errno.pyi
new file mode 100644
index 000000000..c60170d66
--- /dev/null
+++ b/2.7/errno.pyi
@@ -0,0 +1,129 @@
+"""Stubs for the 'errno' module."""
+
+from typing import Dict
+
+errorcode = ...  # type: Dict[int, str]
+
+E2BIG = ...  # type: int
+EACCES = ...  # type: int
+EADDRINUSE = ...  # type: int
+EADDRNOTAVAIL = ...  # type: int
+EADV = ...  # type: int
+EAFNOSUPPORT = ...  # type: int
+EAGAIN = ...  # type: int
+EALREADY = ...  # type: int
+EBADE = ...  # type: int
+EBADF = ...  # type: int
+EBADFD = ...  # type: int
+EBADMSG = ...  # type: int
+EBADR = ...  # type: int
+EBADRQC = ...  # type: int
+EBADSLT = ...  # type: int
+EBFONT = ...  # type: int
+EBUSY = ...  # type: int
+ECHILD = ...  # type: int
+ECHRNG = ...  # type: int
+ECOMM = ...  # type: int
+ECONNABORTED = ...  # type: int
+ECONNREFUSED = ...  # type: int
+ECONNRESET = ...  # type: int
+EDEADLK = ...  # type: int
+EDEADLOCK = ...  # type: int
+EDESTADDRREQ = ...  # type: int
+EDOM = ...  # type: int
+EDOTDOT = ...  # type: int
+EDQUOT = ...  # type: int
+EEXIST = ...  # type: int
+EFAULT = ...  # type: int
+EFBIG = ...  # type: int
+EHOSTDOWN = ...  # type: int
+EHOSTUNREACH = ...  # type: int
+EIDRM = ...  # type: int
+EILSEQ = ...  # type: int
+EINPROGRESS = ...  # type: int
+EINTR = ...  # type: int
+EINVAL = ...  # type: int
+EIO = ...  # type: int
+EISCONN = ...  # type: int
+EISDIR = ...  # type: int
+EISNAM = ...  # type: int
+EL2HLT = ...  # type: int
+EL2NSYNC = ...  # type: int
+EL3HLT = ...  # type: int
+EL3RST = ...  # type: int
+ELIBACC = ...  # type: int
+ELIBBAD = ...  # type: int
+ELIBEXEC = ...  # type: int
+ELIBMAX = ...  # type: int
+ELIBSCN = ...  # type: int
+ELNRNG = ...  # type: int
+ELOOP = ...  # type: int
+EMFILE = ...  # type: int
+EMLINK = ...  # type: int
+EMSGSIZE = ...  # type: int
+EMULTIHOP = ...  # type: int
+ENAMETOOLONG = ...  # type: int
+ENAVAIL = ...  # type: int
+ENETDOWN = ...  # type: int
+ENETRESET = ...  # type: int
+ENETUNREACH = ...  # type: int
+ENFILE = ...  # type: int
+ENOANO = ...  # type: int
+ENOBUFS = ...  # type: int
+ENOCSI = ...  # type: int
+ENODATA = ...  # type: int
+ENODEV = ...  # type: int
+ENOENT = ...  # type: int
+ENOEXEC = ...  # type: int
+ENOLCK = ...  # type: int
+ENOLINK = ...  # type: int
+ENOMEM = ...  # type: int
+ENOMSG = ...  # type: int
+ENONET = ...  # type: int
+ENOPKG = ...  # type: int
+ENOPROTOOPT = ...  # type: int
+ENOSPC = ...  # type: int
+ENOSR = ...  # type: int
+ENOSTR = ...  # type: int
+ENOSYS = ...  # type: int
+ENOTBLK = ...  # type: int
+ENOTCONN = ...  # type: int
+ENOTDIR = ...  # type: int
+ENOTEMPTY = ...  # type: int
+ENOTNAM = ...  # type: int
+ENOTSOCK = ...  # type: int
+ENOTSUP = ...  # type: int
+ENOTTY = ...  # type: int
+ENOTUNIQ = ...  # type: int
+ENXIO = ...  # type: int
+EOPNOTSUPP = ...  # type: int
+EOVERFLOW = ...  # type: int
+EPERM = ...  # type: int
+EPFNOSUPPORT = ...  # type: int
+EPIPE = ...  # type: int
+EPROTO = ...  # type: int
+EPROTONOSUPPORT = ...  # type: int
+EPROTOTYPE = ...  # type: int
+ERANGE = ...  # type: int
+EREMCHG = ...  # type: int
+EREMOTE = ...  # type: int
+EREMOTEIO = ...  # type: int
+ERESTART = ...  # type: int
+EROFS = ...  # type: int
+ESHUTDOWN = ...  # type: int
+ESOCKTNOSUPPORT = ...  # type: int
+ESPIPE = ...  # type: int
+ESRCH = ...  # type: int
+ESRMNT = ...  # type: int
+ESTALE = ...  # type: int
+ESTRPIPE = ...  # type: int
+ETIME = ...  # type: int
+ETIMEDOUT = ...  # type: int
+ETOOMANYREFS = ...  # type: int
+ETXTBSY = ...  # type: int
+EUCLEAN = ...  # type: int
+EUNATCH = ...  # type: int
+EUSERS = ...  # type: int
+EWOULDBLOCK = ...  # type: int
+EXDEV = ...  # type: int
+EXFULL = ...  # type: int
diff --git a/2.7/fcntl.pyi b/2.7/fcntl.pyi
new file mode 100644
index 000000000..28e8ca50d
--- /dev/null
+++ b/2.7/fcntl.pyi
@@ -0,0 +1,85 @@
+from typing import Union
+import io
+
+FASYNC = ...  # type: int
+FD_CLOEXEC = ...  # type: int
+
+DN_ACCESS = ...  # type: int
+DN_ATTRIB = ...  # type: int
+DN_CREATE = ...  # type: int
+DN_DELETE = ...  # type: int
+DN_MODIFY = ...  # type: int
+DN_MULTISHOT = ...  # type: int
+DN_RENAME = ...  # type: int
+F_DUPFD = ...  # type: int
+F_EXLCK = ...  # type: int
+F_GETFD = ...  # type: int
+F_GETFL = ...  # type: int
+F_GETLEASE = ...  # type: int
+F_GETLK = ...  # type: int
+F_GETLK64 = ...  # type: int
+F_GETOWN = ...  # type: int
+F_GETSIG = ...  # type: int
+F_NOTIFY = ...  # type: int
+F_RDLCK = ...  # type: int
+F_SETFD = ...  # type: int
+F_SETFL = ...  # type: int
+F_SETLEASE = ...  # type: int
+F_SETLK = ...  # type: int
+F_SETLK64 = ...  # type: int
+F_SETLKW = ...  # type: int
+F_SETLKW64 = ...  # type: int
+F_SETOWN = ...  # type: int
+F_SETSIG = ...  # type: int
+F_SHLCK = ...  # type: int
+F_UNLCK = ...  # type: int
+F_WRLCK = ...  # type: int
+I_ATMARK = ...  # type: int
+I_CANPUT = ...  # type: int
+I_CKBAND = ...  # type: int
+I_FDINSERT = ...  # type: int
+I_FIND = ...  # type: int
+I_FLUSH = ...  # type: int
+I_FLUSHBAND = ...  # type: int
+I_GETBAND = ...  # type: int
+I_GETCLTIME = ...  # type: int
+I_GETSIG = ...  # type: int
+I_GRDOPT = ...  # type: int
+I_GWROPT = ...  # type: int
+I_LINK = ...  # type: int
+I_LIST = ...  # type: int
+I_LOOK = ...  # type: int
+I_NREAD = ...  # type: int
+I_PEEK = ...  # type: int
+I_PLINK = ...  # type: int
+I_POP = ...  # type: int
+I_PUNLINK = ...  # type: int
+I_PUSH = ...  # type: int
+I_RECVFD = ...  # type: int
+I_SENDFD = ...  # type: int
+I_SETCLTIME = ...  # type: int
+I_SETSIG = ...  # type: int
+I_SRDOPT = ...  # type: int
+I_STR = ...  # type: int
+I_SWROPT = ...  # type: int
+I_UNLINK = ...  # type: int
+LOCK_EX = ...  # type: int
+LOCK_MAND = ...  # type: int
+LOCK_NB = ...  # type: int
+LOCK_READ = ...  # type: int
+LOCK_RW = ...  # type: int
+LOCK_SH = ...  # type: int
+LOCK_UN = ...  # type: int
+LOCK_WRITE = ...  # type: int
+
+_ANYFILE = Union[int, io.IOBase]
+
+def fcntl(fd: _ANYFILE, op: int, arg: Union[int, str] = 0) -> Union[int, str]: ...
+
+# TODO: arg: int or read-only buffer interface or read-write buffer interface
+def ioctl(fd: _ANYFILE, op: int, arg: Union[int, str] = 0,
+          mutate_flag: bool = True) -> Union[int, str]: ...
+
+def flock(fd: _ANYFILE, op: int) -> None: ...
+def lockf(fd: _ANYFILE, op: int, length: int = 0, start: int = 0,
+          whence: int = 0) -> Union[int, str]: ...
diff --git a/2.7/imp.pyi b/2.7/imp.pyi
new file mode 100644
index 000000000..94d515c76
--- /dev/null
+++ b/2.7/imp.pyi
@@ -0,0 +1,35 @@
+"""Stubs for the 'imp' module."""
+
+from typing import List, Optional, Tuple, Iterable, IO, Any
+import types
+
+C_BUILTIN = ...  # type: int
+C_EXTENSION = ...  # type: int
+IMP_HOOK = ...  # type: int
+PKG_DIRECTORY = ...  # type: int
+PY_CODERESOURCE = ...  # type: int
+PY_COMPILED = ...  # type: int
+PY_FROZEN = ...  # type: int
+PY_RESOURCE = ...  # type: int
+PY_SOURCE = ...  # type: int
+SEARCH_ERROR = ...  # type: int
+
+def acquire_lock() -> None: ...
+def find_module(name: str, path: Iterable[str] = None) -> Optional[Tuple[str, str, Tuple[str, str, int]]]: ...
+def get_magic() -> str: ...
+def get_suffixes() -> List[Tuple[str, str, int]]: ...
+def init_builtin(name: str) -> types.ModuleType: ...
+def init_frozen(name: str) -> types.ModuleType: ...
+def is_builtin(name: str) -> int: ...
+def is_frozen(name: str) -> bool: ...
+def load_compiled(name: str, pathname: str, file: IO[Any] = None) -> types.ModuleType: ...
+def load_dynamic(name: str, pathname: str, file: IO[Any] = None) -> types.ModuleType: ...
+def load_module(name: str, file: str, pathname: str, description: Tuple[str, str, int]) -> types.ModuleType: ...
+def load_source(name: str, pathname: str, file: IO[Any] = None) -> types.ModuleType: ...
+def lock_held() -> bool: ...
+def new_module(name: str) -> types.ModuleType: ...
+def release_lock() -> None: ...
+
+class NullImporter:
+    def __init__(self, path_string: str) -> None: ...
+    def find_module(fullname: str, path: str = None) -> None: ...
diff --git a/2.7/marshal.pyi b/2.7/marshal.pyi
new file mode 100644
index 000000000..51bb324e3
--- /dev/null
+++ b/2.7/marshal.pyi
@@ -0,0 +1,8 @@
+from typing import Any, IO
+
+version = ...  # type: int
+
+def dump(value: Any, file: IO[Any], version: int = None) -> None: ...
+def load(file: IO[Any]) -> Any: ...
+def dumps(value: Any, version: int = None) -> str: ...
+def loads(string: str) -> Any: ...
diff --git a/2.7/select.pyi b/2.7/select.pyi
new file mode 100644
index 000000000..dadba85e3
--- /dev/null
+++ b/2.7/select.pyi
@@ -0,0 +1,101 @@
+"""Stubs for the 'select' module."""
+
+from typing import Any, Optional
+
+EPOLLERR = ...  # type: int
+EPOLLET = ...  # type: int
+EPOLLHUP = ...  # type: int
+EPOLLIN = ...  # type: int
+EPOLLMSG = ...  # type: int
+EPOLLONESHOT = ...  # type: int
+EPOLLOUT = ...  # type: int
+EPOLLPRI = ...  # type: int
+EPOLLRDBAND = ...  # type: int
+EPOLLRDNORM = ...  # type: int
+EPOLLWRBAND = ...  # type: int
+EPOLLWRNORM = ...  # type: int
+EPOLL_RDHUP = ...  # type: int
+KQ_EV_ADD = ...  # type: int
+KQ_EV_CLEAR = ...  # type: int
+KQ_EV_DELETE = ...  # type: int
+KQ_EV_DISABLE = ...  # type: int
+KQ_EV_ENABLE = ...  # type: int
+KQ_EV_EOF = ...  # type: int
+KQ_EV_ERROR = ...  # type: int
+KQ_EV_FLAG1 = ...  # type: int
+KQ_EV_ONESHOT = ...  # type: int
+KQ_EV_SYSFLAGS = ...  # type: int
+KQ_FILTER_AIO = ...  # type: int
+KQ_FILTER_NETDEV = ...  # type: int
+KQ_FILTER_PROC = ...  # type: int
+KQ_FILTER_READ = ...  # type: int
+KQ_FILTER_SIGNAL = ...  # type: int
+KQ_FILTER_TIMER = ...  # type: int
+KQ_FILTER_VNODE = ...  # type: int
+KQ_FILTER_WRITE = ...  # type: int
+KQ_NOTE_ATTRIB = ...  # type: int
+KQ_NOTE_CHILD = ...  # type: int
+KQ_NOTE_DELETE = ...  # type: int
+KQ_NOTE_EXEC = ...  # type: int
+KQ_NOTE_EXIT = ...  # type: int
+KQ_NOTE_EXTEND = ...  # type: int
+KQ_NOTE_FORK = ...  # type: int
+KQ_NOTE_LINK = ...  # type: int
+KQ_NOTE_LINKDOWN = ...  # type: int
+KQ_NOTE_LINKINV = ...  # type: int
+KQ_NOTE_LINKUP = ...  # type: int
+KQ_NOTE_LOWAT = ...  # type: int
+KQ_NOTE_PCTRLMASK = ...  # type: int
+KQ_NOTE_PDATAMASK = ...  # type: int
+KQ_NOTE_RENAME = ...  # type: int
+KQ_NOTE_REVOKE = ...  # type: int
+KQ_NOTE_TRACK = ...  # type: int
+KQ_NOTE_TRACKERR = ...  # type: int
+KQ_NOTE_WRITE = ...  # type: int
+PIPE_BUF = ...  # type: int
+POLLERR = ...  # type: int
+POLLHUP = ...  # type: int
+POLLIN = ...  # type: int
+POLLMSG = ...  # type: int
+POLLNVAL = ...  # type: int
+POLLOUT = ...  # type: int
+POLLPRI = ...  # type: int
+POLLRDBAND = ...  # type: int
+POLLRDNORM = ...  # type: int
+POLLWRBAND = ...  # type: int
+POLLWRNORM = ...  # type: int
+
+def poll() -> epoll: ...
+def select(rlist, wlist, xlist, timeout: Optional[int]) -> Tuple[List, List, List]: ...
+
+class error(Exception): ...
+
+class kevent(object):
+    data = ... # type: Any
+    fflags = ... # type: int
+    filter = ... # type: int
+    flags = ... # type: int
+    ident = ... # type: Any
+    udata = ... # type: Any
+    def __init__(self, *args, **kwargs): ...
+
+class kqueue(object):
+    closed = ... # type: bool
+    def __init__(self) -> None: ...
+    def close(self) -> None: ...
+    def control(self, changelist: Optional[Iterable[kevent]], max_events: int, timeout: int = ...) -> List[kevent]: ...
+    def fileno(self) -> int: ...
+    @classmethod
+    def fromfd(cls, fd: int) -> kqueue: ...
+
+class epoll(object):
+    def __init__(self, sizehint: int = ...) -> None: ...
+    def close(self) -> None: ...
+    def fileno(self) -> int: ...
+    def register(self, fd: int, eventmask: int = ...) -> None: ...
+    def modify(self, fd: int, eventmask: int) -> None: ...
+    def unregister(fd: int) -> None: ...
+    def poll(timeout: float = ..., maxevents: int = ...) -> Any: ...
+    @classmethod
+    def fromfd(self, fd: int) -> epoll: ...
+
diff --git a/2.7/sys.pyi b/2.7/sys.pyi
new file mode 100644
index 000000000..52fffa7e5
--- /dev/null
+++ b/2.7/sys.pyi
@@ -0,0 +1,113 @@
+"""Stubs for the 'sys' module."""
+
+from typing import (
+    List, Sequence, Any, Dict, Tuple, BinaryIO, overload
+)
+
+class _flags:
+    bytes_warning = ...  # type: int
+    debug = ...  # type: int
+    division_new = ...  # type: int
+    division_warning = ...  # type: int
+    dont_write_bytecode = ...  # type: int
+    hash_randomization = ...  # type: int
+    ignore_environment = ...  # type: int
+    inspect = ...  # type: int
+    interactive = ...  # type: int
+    no_site = ...  # type: int
+    no_user_site = ...  # type: int
+    optimize = ...  # type: int
+    py3k_warning = ...  # type: int
+    tabcheck = ...  # type: int
+    unicode = ...  # type: int
+    verbose = ...  # type: int
+
+class _float_info:
+    max = ...  # type: float
+    max_exp = ...  # type: int
+    max_10_exp = ...  # type: int
+    min = ...  # type: float
+    min_exp = ...  # type: int
+    min_10_exp = ...  # type: int
+    dig = ...  # type: int
+    mant_dig = ...  # type: int
+    epsilon = ...  # type: float
+    radix = ...  # type: int
+    rounds = ...  # type: int
+
+class _version_info(Tuple[int, int, int, str, int]):
+    major = 0
+    minor = 0
+    micro = 0
+    releaselevel = ''
+    serial = 0
+
+_mercurial = ...  # type: tuple
+api_version = ...  # type: int
+argv = ...  # type: List[str]
+builtin_module_names = ...  # type: List[str]
+byteorder = ...  # type: str
+copyright = ...  # type: str
+dont_write_bytecode = ...  # type: bool
+exec_prefix = ...  # type: str
+executable = ...  # type: str
+flags = ...  # type: _flags
+float_repr_style = ...  # type: str
+hexversion = ...  # type: int
+long_info = ...  # type: object
+maxint = ...  # type: int
+maxsize = ...  # type: int
+maxunicode = ...  # type: int
+modules = ...  # type: Dict[str, module]
+path = ...  # type: List[str]
+platform = ...  # type: str
+prefix = ...  # type: str
+py3kwarning = ...  # type: bool
+stderr = ...  # type: file
+stdin = ...  # type: file
+stdout = ...  # type: file
+subversion = ...  # type: tuple
+version = ...  # type: str
+version_info = ...  # type: Tuple[int]
+warnoptions = ...  # type: object
+float_info = ...  # type: _float_info
+version_info = ...  # type: _version_info
+
+class _WindowsVersionType:
+    major = ...  # type: Any
+    minor = ...  # type: Any
+    build = ...  # type: Any
+    platform = ...  # type: Any
+    service_pack = ...  # type: Any
+    service_pack_major = ...  # type: Any
+    service_pack_minor = ...  # type: Any
+    suite_mask = ...  # type: Any
+    product_type = ...  # type: Any
+
+def getwindowsversion() -> _WindowsVersionType: ...  # TODO return type
+
+def _clear_type_cache() -> None: ...
+def _current_frames() -> Dict[int, Any]: ...
+def _getframe(depth: int = ...) -> Any: ...  # TODO: Return FrameObject
+def call_tracing(fn: Any, args: Any) -> Any: ...
+def displayhook(value: int) -> None: ...  # value might be None
+def excepthook(type_: type, value: BaseException, traceback: Any) -> None: ...  # TODO traceback type
+def exc_clear() -> None:
+    raise DeprecationWarning()
+def exc_info() -> Tuple[type, Any, Any]: ... # TODO traceback type
+def exit(arg: int = ...) -> None:
+    raise SystemExit()
+def getcheckinterval() -> int: ...  # deprecated
+def getdefaultencoding() -> str: ...
+def getdlopenflags() -> int: ...
+def getfilesystemencoding() -> Union[str, None]: ...
+def getrefcount(object) -> int: ...
+def getrecursionlimit() -> int: ...
+def getsizeof(obj: object, default: int = ...) -> int: ...
+def getprofile() -> None: ...
+def gettrace() -> None: ...
+def setcheckinterval(interval: int) -> None: ...  # deprecated
+def setdlopenflags(n: int) -> None: ...
+def setprofile(profilefunc: Any) -> None: ... # TODO type
+def setrecursionlimit(limit: int) -> None: ...
+def settrace(tracefunc: Any) -> None: ... # TODO type
diff --git a/2.7/unicodedata.pyi b/2.7/unicodedata.pyi
new file mode 100644
index 000000000..9e3be51be
--- /dev/null
+++ b/2.7/unicodedata.pyi
@@ -0,0 +1,39 @@
+"""Stubs for the 'unicodedata' module."""
+
+from typing import Any, TypeVar
+
+ucd_3_2_0 = ... # type: UCD
+ucnhash_CAPI = ... # type: Any (PyCapsule)
+unidata_version = ... # type: str
+
+_default = TypeVar("default")
+
+def bidirectional(unichr: unicode) -> str: ...
+def category(unichr: unicode) -> str: ...
+def combining(unichr: unicode) -> int: ...
+def decimal(chr: unicode, default=_default) -> Union[int, _default]: ...
+def decomposition(unichr: unicode) -> str: ...
+def digit(chr: unicode, default=_default) -> Union[int, _default]: ...
+def east_asian_width(unichr: unicode): str
+def lookup(name: str): unicode
+def mirrored(unichr: unicode): int
+def name(chr: unicode, default=_default) -> Union[str, _default]: ...
+def normalize(form: str, unistr: unicode) -> unicode: ...
+def numeric(chr, default=_default): Union[float, _default]: ...
+
+class UCD(object):
+    unidata_version = ... # type: str
+    # The methods below are constructed from the same array in C
+    # (unicodedata_functions) and hence identical to the methods above.
+    def bidirectional(unichr: unicode) -> str: ...
+    def category(unichr: unicode) -> str: ...
+    def combining(unichr: unicode) -> int: ...
+    def decimal(chr: unicode, default=_default) -> Union[int, _default]: ...
+    def decomposition(unichr: unicode) -> str: ...
+    def digit(chr: unicode, default=_default) -> Union[int, _default]: ...
+    def east_asian_width(unichr: unicode): str
+    def lookup(name: str): unicode
+    def mirrored(unichr: unicode): int
+    def name(chr: unicode, default=_default) -> Union[str, _default]: ...
+    def normalize(form: str, unistr: unicode) -> unicode: ...
+    def numeric(chr, default=_default): Union[float, _default]: ...