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def get_nowait(self) -> _T:
"""Remove and return an item from the queue without blocking.
Return an item if one is immediately available, else raise
`QueueEmpty`.
"""
self._consume_expired()
if self._putters:
assert self.full(), "queue not full, why are putte... |
def task_done(self) -> None:
"""Indicate that a formerly enqueued task is complete.
Used by queue consumers. For each `.get` used to fetch a task, a
subsequent call to `.task_done` tells the queue that the processing
on the task is complete.
If a `.join` is blocking, it resumes... |
def join(self, timeout: Union[float, datetime.timedelta] = None) -> Awaitable[None]:
"""Block until all items in the queue are processed.
Returns an awaitable, which raises `tornado.util.TimeoutError` after a
timeout.
"""
return self._finished.wait(timeout) |
def cpu_count() -> int:
"""Returns the number of processors on this machine."""
if multiprocessing is None:
return 1
try:
return multiprocessing.cpu_count()
except NotImplementedError:
pass
try:
return os.sysconf("SC_NPROCESSORS_CONF")
except (AttributeError, Valu... |
def fork_processes(num_processes: Optional[int], max_restarts: int = None) -> int:
"""Starts multiple worker processes.
If ``num_processes`` is None or <= 0, we detect the number of cores
available on this machine and fork that number of child
processes. If ``num_processes`` is given and > 0, we fork t... |
def set_exit_callback(self, callback: Callable[[int], None]) -> None:
"""Runs ``callback`` when this process exits.
The callback takes one argument, the return code of the process.
This method uses a ``SIGCHLD`` handler, which is a global setting
and may conflict if you have other libr... |
def wait_for_exit(self, raise_error: bool = True) -> "Future[int]":
"""Returns a `.Future` which resolves when the process exits.
Usage::
ret = yield proc.wait_for_exit()
This is a coroutine-friendly alternative to `set_exit_callback`
(and a replacement for the blocking `s... |
def initialize(cls) -> None:
"""Initializes the ``SIGCHLD`` handler.
The signal handler is run on an `.IOLoop` to avoid locking issues.
Note that the `.IOLoop` used for signal handling need not be the
same one used by individual Subprocess objects (as long as the
``IOLoops`` are... |
def uninitialize(cls) -> None:
"""Removes the ``SIGCHLD`` handler."""
if not cls._initialized:
return
signal.signal(signal.SIGCHLD, cls._old_sigchld)
cls._initialized = False |
def _handle_socket(self, event: int, fd: int, multi: Any, data: bytes) -> None:
"""Called by libcurl when it wants to change the file descriptors
it cares about.
"""
event_map = {
pycurl.POLL_NONE: ioloop.IOLoop.NONE,
pycurl.POLL_IN: ioloop.IOLoop.READ,
... |
def _set_timeout(self, msecs: int) -> None:
"""Called by libcurl to schedule a timeout."""
if self._timeout is not None:
self.io_loop.remove_timeout(self._timeout)
self._timeout = self.io_loop.add_timeout(
self.io_loop.time() + msecs / 1000.0, self._handle_timeout
... |
def _handle_events(self, fd: int, events: int) -> None:
"""Called by IOLoop when there is activity on one of our
file descriptors.
"""
action = 0
if events & ioloop.IOLoop.READ:
action |= pycurl.CSELECT_IN
if events & ioloop.IOLoop.WRITE:
action |=... |
def _handle_timeout(self) -> None:
"""Called by IOLoop when the requested timeout has passed."""
self._timeout = None
while True:
try:
ret, num_handles = self._multi.socket_action(pycurl.SOCKET_TIMEOUT, 0)
except pycurl.error as e:
ret = e.... |
def _handle_force_timeout(self) -> None:
"""Called by IOLoop periodically to ask libcurl to process any
events it may have forgotten about.
"""
while True:
try:
ret, num_handles = self._multi.socket_all()
except pycurl.error as e:
r... |
def _finish_pending_requests(self) -> None:
"""Process any requests that were completed by the last
call to multi.socket_action.
"""
while True:
num_q, ok_list, err_list = self._multi.info_read()
for curl in ok_list:
self._finish(curl)
... |
def start(port, root_directory, bucket_depth):
"""Starts the mock S3 server on the given port at the given path."""
application = S3Application(root_directory, bucket_depth)
http_server = httpserver.HTTPServer(application)
http_server.listen(port)
ioloop.IOLoop.current().start() |
def close(self) -> None:
"""Closes the HTTPClient, freeing any resources used."""
if not self._closed:
self._async_client.close()
self._io_loop.close()
self._closed = True |
def fetch(
self, request: Union["HTTPRequest", str], **kwargs: Any
) -> "HTTPResponse":
"""Executes a request, returning an `HTTPResponse`.
The request may be either a string URL or an `HTTPRequest` object.
If it is a string, we construct an `HTTPRequest` using any additional
... |
def close(self) -> None:
"""Destroys this HTTP client, freeing any file descriptors used.
This method is **not needed in normal use** due to the way
that `AsyncHTTPClient` objects are transparently reused.
``close()`` is generally only necessary when either the
`.IOLoop` is also... |
def fetch(
self,
request: Union[str, "HTTPRequest"],
raise_error: bool = True,
**kwargs: Any
) -> Awaitable["HTTPResponse"]:
"""Executes a request, asynchronously returning an `HTTPResponse`.
The request may be either a string URL or an `HTTPRequest` object.
... |
def configure(
cls, impl: "Union[None, str, Type[Configurable]]", **kwargs: Any
) -> None:
"""Configures the `AsyncHTTPClient` subclass to use.
``AsyncHTTPClient()`` actually creates an instance of a subclass.
This method may be called with either a class object or the
fully... |
def _cleanup(self) -> None:
"""Cleanup unused transports."""
if self._cleanup_handle:
self._cleanup_handle.cancel()
now = self._loop.time()
timeout = self._keepalive_timeout
if self._conns:
connections = {}
deadline = now - timeout
... |
def _cleanup_closed(self) -> None:
"""Double confirmation for transport close.
Some broken ssl servers may leave socket open without proper close.
"""
if self._cleanup_closed_handle:
self._cleanup_closed_handle.cancel()
for transport in self._cleanup_closed_transport... |
def _available_connections(self, key: 'ConnectionKey') -> int:
"""
Return number of available connections taking into account
the limit, limit_per_host and the connection key.
If it returns less than 1 means that there is no connections
availables.
"""
if self._... |
async def connect(self, req: 'ClientRequest',
traces: List['Trace'],
timeout: 'ClientTimeout') -> Connection:
"""Get from pool or create new connection."""
key = req.connection_key
available = self._available_connections(key)
# Wait if there a... |
def _release_waiter(self) -> None:
"""
Iterates over all waiters till found one that is not finsihed and
belongs to a host that has available connections.
"""
if not self._waiters:
return
# Having the dict keys ordered this avoids to iterate
# at the ... |
def close(self) -> Awaitable[None]:
"""Close all ongoing DNS calls."""
for ev in self._throttle_dns_events.values():
ev.cancel()
return super().close() |
def clear_dns_cache(self,
host: Optional[str]=None,
port: Optional[int]=None) -> None:
"""Remove specified host/port or clear all dns local cache."""
if host is not None and port is not None:
self._cached_hosts.remove((host, port))
elif... |
async def _create_connection(self, req: 'ClientRequest',
traces: List['Trace'],
timeout: 'ClientTimeout') -> ResponseHandler:
"""Create connection.
Has same keyword arguments as BaseEventLoop.create_connection.
"""
if req... |
def _get_ssl_context(self, req: 'ClientRequest') -> Optional[SSLContext]:
"""Logic to get the correct SSL context
0. if req.ssl is false, return None
1. if ssl_context is specified in req, use it
2. if _ssl_context is specified in self, use it
3. otherwise:
1. if ve... |
def _websocket_mask_python(mask: bytes, data: bytearray) -> None:
"""Websocket masking function.
`mask` is a `bytes` object of length 4; `data` is a `bytearray`
object of any length. The contents of `data` are masked with `mask`,
as specified in section 5.3 of RFC 6455.
Note that this function mut... |
def json(self, *, # type: ignore
loads: Callable[[Any], Any]=json.loads) -> None:
"""Return parsed JSON data.
.. versionadded:: 0.22
"""
return loads(self.data) |
def parse_frame(self, buf: bytes) -> List[Tuple[bool, Optional[int],
bytearray,
Optional[bool]]]:
"""Return the next frame from the socket."""
frames = []
if self._tail:
buf, self.... |
async def _send_frame(self, message: bytes, opcode: int,
compress: Optional[int]=None) -> None:
"""Send a frame over the websocket with message as its payload."""
if self._closing:
ws_logger.warning('websocket connection is closing.')
rsv = 0
# Onl... |
async def pong(self, message: bytes=b'') -> None:
"""Send pong message."""
if isinstance(message, str):
message = message.encode('utf-8')
await self._send_frame(message, WSMsgType.PONG) |
async def ping(self, message: bytes=b'') -> None:
"""Send ping message."""
if isinstance(message, str):
message = message.encode('utf-8')
await self._send_frame(message, WSMsgType.PING) |
async def send(self, message: Union[str, bytes],
binary: bool=False,
compress: Optional[int]=None) -> None:
"""Send a frame over the websocket with message as its payload."""
if isinstance(message, str):
message = message.encode('utf-8')
if binar... |
async def close(self, code: int=1000, message: bytes=b'') -> None:
"""Close the websocket, sending the specified code and message."""
if isinstance(message, str):
message = message.encode('utf-8')
try:
await self._send_frame(
PACK_CLOSE_CODE(code) + messag... |
def update_cookies(self,
cookies: LooseCookies,
response_url: URL=URL()) -> None:
"""Update cookies."""
hostname = response_url.raw_host
if not self._unsafe and is_ip_address(hostname):
# Don't accept cookies from IPs
return
... |
def filter_cookies(self, request_url: URL=URL()) -> 'BaseCookie[str]':
"""Returns this jar's cookies filtered by their attributes."""
self._do_expiration()
request_url = URL(request_url)
filtered = SimpleCookie()
hostname = request_url.raw_host or ""
is_not_secure = reque... |
def _is_domain_match(domain: str, hostname: str) -> bool:
"""Implements domain matching adhering to RFC 6265."""
if hostname == domain:
return True
if not hostname.endswith(domain):
return False
non_matching = hostname[:-len(domain)]
if not non_matching... |
def _is_path_match(req_path: str, cookie_path: str) -> bool:
"""Implements path matching adhering to RFC 6265."""
if not req_path.startswith("/"):
req_path = "/"
if req_path == cookie_path:
return True
if not req_path.startswith(cookie_path):
return ... |
def _parse_date(cls, date_str: str) -> Optional[datetime.datetime]:
"""Implements date string parsing adhering to RFC 6265."""
if not date_str:
return None
found_time = False
found_day = False
found_month = False
found_year = False
hour = minute = se... |
def my_protocol_parser(out, buf):
"""Parser is used with StreamParser for incremental protocol parsing.
Parser is a generator function, but it is not a coroutine. Usually
parsers are implemented as a state machine.
more details in asyncio/parsers.py
existing parsers:
* HTTP protocol parsers a... |
def set_content_disposition(self,
disptype: str,
quote_fields: bool=True,
**params: Any) -> None:
"""Sets ``Content-Disposition`` header."""
self._headers[hdrs.CONTENT_DISPOSITION] = content_disposition_heade... |
def clone(self, *, method: str=sentinel, rel_url: StrOrURL=sentinel,
headers: LooseHeaders=sentinel, scheme: str=sentinel,
host: str=sentinel,
remote: str=sentinel) -> 'BaseRequest':
"""Clone itself with replacement some attributes.
Creates and returns a new in... |
def forwarded(self) -> Tuple[Mapping[str, str], ...]:
"""A tuple containing all parsed Forwarded header(s).
Makes an effort to parse Forwarded headers as specified by RFC 7239:
- It adds one (immutable) dictionary per Forwarded 'field-value', ie
per proxy. The element corresponds to ... |
def host(self) -> str:
"""Hostname of the request.
Hostname is resolved in this order:
- overridden value by .clone(host=new_host) call.
- HOST HTTP header
- socket.getfqdn() value
"""
host = self._message.headers.get(hdrs.HOST)
if host is not None:
... |
def remote(self) -> Optional[str]:
"""Remote IP of client initiated HTTP request.
The IP is resolved in this order:
- overridden value by .clone(remote=new_remote) call.
- peername of opened socket
"""
if isinstance(self._transport_peername, (list, tuple)):
... |
def _http_date(_date_str: str) -> Optional[datetime.datetime]:
"""Process a date string, return a datetime object
"""
if _date_str is not None:
timetuple = parsedate(_date_str)
if timetuple is not None:
return datetime.datetime(*timetuple[:6],
... |
def if_modified_since(self) -> Optional[datetime.datetime]:
"""The value of If-Modified-Since HTTP header, or None.
This header is represented as a `datetime` object.
"""
return self._http_date(self.headers.get(hdrs.IF_MODIFIED_SINCE)) |
def if_unmodified_since(self) -> Optional[datetime.datetime]:
"""The value of If-Unmodified-Since HTTP header, or None.
This header is represented as a `datetime` object.
"""
return self._http_date(self.headers.get(hdrs.IF_UNMODIFIED_SINCE)) |
def if_range(self) -> Optional[datetime.datetime]:
"""The value of If-Range HTTP header, or None.
This header is represented as a `datetime` object.
"""
return self._http_date(self.headers.get(hdrs.IF_RANGE)) |
def cookies(self) -> Mapping[str, str]:
"""Return request cookies.
A read-only dictionary-like object.
"""
raw = self.headers.get(hdrs.COOKIE, '')
parsed = SimpleCookie(raw)
return MappingProxyType(
{key: val.value for key, val in parsed.items()}) |
def http_range(self) -> slice:
"""The content of Range HTTP header.
Return a slice instance.
"""
rng = self._headers.get(hdrs.RANGE)
start, end = None, None
if rng is not None:
try:
pattern = r'^bytes=(\d*)-(\d*)$'
start, end ... |
def has_body(self) -> bool:
"""Return True if request's HTTP BODY can be read, False otherwise."""
warnings.warn(
"Deprecated, use .can_read_body #2005",
DeprecationWarning, stacklevel=2)
return not self._payload.at_eof() |
async def read(self) -> bytes:
"""Read request body if present.
Returns bytes object with full request content.
"""
if self._read_bytes is None:
body = bytearray()
while True:
chunk = await self._payload.readany()
body.extend(chunk... |
async def text(self) -> str:
"""Return BODY as text using encoding from .charset."""
bytes_body = await self.read()
encoding = self.charset or 'utf-8'
return bytes_body.decode(encoding) |
async def json(self, *, loads: JSONDecoder=DEFAULT_JSON_DECODER) -> Any:
"""Return BODY as JSON."""
body = await self.text()
return loads(body) |
async def post(self) -> 'MultiDictProxy[Union[str, bytes, FileField]]':
"""Return POST parameters."""
if self._post is not None:
return self._post
if self._method not in self.POST_METHODS:
self._post = MultiDictProxy(MultiDict())
return self._post
con... |
async def shutdown(self, timeout: Optional[float]=15.0) -> None:
"""Worker process is about to exit, we need cleanup everything and
stop accepting requests. It is especially important for keep-alive
connections."""
self._force_close = True
if self._keepalive_handle is not None:
... |
def keep_alive(self, val: bool) -> None:
"""Set keep-alive connection mode.
:param bool val: new state.
"""
self._keepalive = val
if self._keepalive_handle:
self._keepalive_handle.cancel()
self._keepalive_handle = None |
def close(self) -> None:
"""Stop accepting new pipelinig messages and close
connection when handlers done processing messages"""
self._close = True
if self._waiter:
self._waiter.cancel() |
def force_close(self) -> None:
"""Force close connection"""
self._force_close = True
if self._waiter:
self._waiter.cancel()
if self.transport is not None:
self.transport.close()
self.transport = None |
async def start(self) -> None:
"""Process incoming request.
It reads request line, request headers and request payload, then
calls handle_request() method. Subclass has to override
handle_request(). start() handles various exceptions in request
or response handling. Connection i... |
def handle_error(self,
request: BaseRequest,
status: int=500,
exc: Optional[BaseException]=None,
message: Optional[str]=None) -> StreamResponse:
"""Handle errors.
Returns HTTP response with specific status code. Logs ad... |
def run_app(app: Union[Application, Awaitable[Application]], *,
host: Optional[str]=None,
port: Optional[int]=None,
path: Optional[str]=None,
sock: Optional[socket.socket]=None,
shutdown_timeout: float=60.0,
ssl_context: Optional[SSLContext]=None,
... |
def iter_chunked(self, n: int) -> AsyncStreamIterator[bytes]:
"""Returns an asynchronous iterator that yields chunks of size n.
Python-3.5 available for Python 3.5+ only
"""
return AsyncStreamIterator(lambda: self.read(n)) |
def unread_data(self, data: bytes) -> None:
""" rollback reading some data from stream, inserting it to buffer head.
"""
warnings.warn("unread_data() is deprecated "
"and will be removed in future releases (#3260)",
DeprecationWarning,
... |
async def readchunk(self) -> Tuple[bytes, bool]:
"""Returns a tuple of (data, end_of_http_chunk). When chunked transfer
encoding is used, end_of_http_chunk is a boolean indicating if the end
of the data corresponds to the end of a HTTP chunk , otherwise it is
always False.
"""
... |
def _read_nowait(self, n: int) -> bytes:
""" Read not more than n bytes, or whole buffer is n == -1 """
chunks = []
while self._buffer:
chunk = self._read_nowait_chunk(n)
chunks.append(chunk)
if n != -1:
n -= len(chunk)
if n ==... |
async def send(self, *args, **kwargs):
"""
Sends data to all registered receivers.
"""
if not self.frozen:
raise RuntimeError("Cannot send non-frozen signal.")
for receiver in self:
await receiver(*args, **kwargs) |
def compile_format(self, log_format: str) -> Tuple[str, List[KeyMethod]]:
"""Translate log_format into form usable by modulo formatting
All known atoms will be replaced with %s
Also methods for formatting of those atoms will be added to
_methods in appropriate order
For example... |
def normalize_path_middleware(
*, append_slash: bool=True, remove_slash: bool=False,
merge_slashes: bool=True,
redirect_class: Type[HTTPMove]=HTTPMovedPermanently) -> _Middleware:
"""
Middleware factory which produces a middleware that normalizes
the path of a request. By normalizing... |
def _gen_form_data(self) -> multipart.MultipartWriter:
"""Encode a list of fields using the multipart/form-data MIME format"""
for dispparams, headers, value in self._fields:
try:
if hdrs.CONTENT_TYPE in headers:
part = payload.get_payload(
... |
async def write(self, chunk: bytes,
*, drain: bool=True, LIMIT: int=0x10000) -> None:
"""Writes chunk of data to a stream.
write_eof() indicates end of stream.
writer can't be used after write_eof() method being called.
write() return drain future.
"""
... |
async def write_headers(self, status_line: str,
headers: 'CIMultiDict[str]') -> None:
"""Write request/response status and headers."""
# status + headers
buf = _serialize_headers(status_line, headers)
self._write(buf) |
def netrc_from_env() -> Optional[netrc.netrc]:
"""Attempt to load the netrc file from the path specified by the env-var
NETRC or in the default location in the user's home directory.
Returns None if it couldn't be found or fails to parse.
"""
netrc_env = os.environ.get('NETRC')
if netrc_env is... |
def parse_mimetype(mimetype: str) -> MimeType:
"""Parses a MIME type into its components.
mimetype is a MIME type string.
Returns a MimeType object.
Example:
>>> parse_mimetype('text/html; charset=utf-8')
MimeType(type='text', subtype='html', suffix='',
parameters={'charset': 'u... |
def content_disposition_header(disptype: str,
quote_fields: bool=True,
**params: str) -> str:
"""Sets ``Content-Disposition`` header.
disptype is a disposition type: inline, attachment, form-data.
Should be valid extension token (see RFC 2183)
... |
def decode(cls, auth_header: str, encoding: str='latin1') -> 'BasicAuth':
"""Create a BasicAuth object from an Authorization HTTP header."""
try:
auth_type, encoded_credentials = auth_header.split(' ', 1)
except ValueError:
raise ValueError('Could not parse authorization ... |
def from_url(cls, url: URL,
*, encoding: str='latin1') -> Optional['BasicAuth']:
"""Create BasicAuth from url."""
if not isinstance(url, URL):
raise TypeError("url should be yarl.URL instance")
if url.user is None:
return None
return cls(url.user,... |
def encode(self) -> str:
"""Encode credentials."""
creds = ('%s:%s' % (self.login, self.password)).encode(self.encoding)
return 'Basic %s' % base64.b64encode(creds).decode(self.encoding) |
def content_type(self) -> str:
"""The value of content part for Content-Type HTTP header."""
raw = self._headers.get(hdrs.CONTENT_TYPE) # type: ignore
if self._stored_content_type != raw:
self._parse_content_type(raw)
return self._content_type |
def charset(self) -> Optional[str]:
"""The value of charset part for Content-Type HTTP header."""
raw = self._headers.get(hdrs.CONTENT_TYPE) # type: ignore
if self._stored_content_type != raw:
self._parse_content_type(raw)
return self._content_dict.get('charset') |
def content_length(self) -> Optional[int]:
"""The value of Content-Length HTTP header."""
content_length = self._headers.get(hdrs.CONTENT_LENGTH) # type: ignore
if content_length is not None:
return int(content_length)
else:
return None |
def request(
method: str,
url: StrOrURL, *,
params: Optional[Mapping[str, str]]=None,
data: Any=None,
json: Any=None,
headers: LooseHeaders=None,
skip_auto_headers: Optional[Iterable[str]]=None,
auth: Optional[BasicAuth]=None,
allow_redirects: bool... |
def request(self,
method: str,
url: StrOrURL,
**kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP request."""
return _RequestContextManager(self._request(method, url, **kwargs)) |
def ws_connect(
self,
url: StrOrURL, *,
method: str=hdrs.METH_GET,
protocols: Iterable[str]=(),
timeout: float=10.0,
receive_timeout: Optional[float]=None,
autoclose: bool=True,
autoping: bool=True,
heartbeat: Op... |
def _prepare_headers(
self,
headers: Optional[LooseHeaders]) -> 'CIMultiDict[str]':
""" Add default headers and transform it to CIMultiDict
"""
# Convert headers to MultiDict
result = CIMultiDict(self._default_headers)
if headers:
if not isinst... |
def get(self, url: StrOrURL, *, allow_redirects: bool=True,
**kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP GET request."""
return _RequestContextManager(
self._request(hdrs.METH_GET, url,
allow_redirects=allow_redirects,
... |
def options(self, url: StrOrURL, *, allow_redirects: bool=True,
**kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP OPTIONS request."""
return _RequestContextManager(
self._request(hdrs.METH_OPTIONS, url,
allow_redirects=allow_redirects,
... |
def head(self, url: StrOrURL, *, allow_redirects: bool=False,
**kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP HEAD request."""
return _RequestContextManager(
self._request(hdrs.METH_HEAD, url,
allow_redirects=allow_redirects,
... |
def post(self, url: StrOrURL,
*, data: Any=None, **kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP POST request."""
return _RequestContextManager(
self._request(hdrs.METH_POST, url,
data=data,
**kwargs)) |
def put(self, url: StrOrURL,
*, data: Any=None, **kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP PUT request."""
return _RequestContextManager(
self._request(hdrs.METH_PUT, url,
data=data,
**kwargs)) |
def patch(self, url: StrOrURL,
*, data: Any=None, **kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP PATCH request."""
return _RequestContextManager(
self._request(hdrs.METH_PATCH, url,
data=data,
**kwargs)) |
def delete(self, url: StrOrURL, **kwargs: Any) -> '_RequestContextManager':
"""Perform HTTP DELETE request."""
return _RequestContextManager(
self._request(hdrs.METH_DELETE, url,
**kwargs)) |
async def close(self) -> None:
"""Close underlying connector.
Release all acquired resources.
"""
if not self.closed:
if self._connector is not None and self._connector_owner:
await self._connector.close()
self._connector = None |
def requote_redirect_url(self, val: bool) -> None:
"""Do URL requoting on redirection handling."""
warnings.warn("session.requote_redirect_url modification "
"is deprecated #2778",
DeprecationWarning,
stacklevel=2)
self._requote_r... |
async def resolve(self, host: str,
port: int, family: int) -> List[Dict[str, Any]]:
"""Return IP address for given hostname""" |
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