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Help on built-in module _socket: NAME _socket - Implementation module for socket operations. DESCRIPTION See the socket module for documentation. CLASSES builtins.OSError(builtins.Exception) socket.gaierror socket.herror builtins.object socket SocketType = class socket(builtins.object) | socket(family=AF_INET, type=SOCK_STREAM, proto=0) -> socket object | socket(family=-1, type=-1, proto=-1, fileno=None) -> socket object | | Open a socket of the given type. The family argument specifies the | address family; it defaults to AF_INET. The type argument specifies | whether this is a stream (SOCK_STREAM, this is the default) | or datagram (SOCK_DGRAM) socket. The protocol argument defaults to 0, | specifying the default protocol. Keyword arguments are accepted. | The socket is created as non-inheritable. | | When a fileno is passed in, family, type and proto are auto-detected, | unless they are explicitly set. | | A socket object represents one endpoint of a network connection. | | Methods of socket objects (keyword arguments not allowed): | | _accept() -- accept connection, returning new socket fd and client address | bind(addr) -- bind the socket to a local address | close() -- close the socket | connect(addr) -- connect the socket to a remote address | connect_ex(addr) -- connect, return an error code instead of an exception | dup() -- return a new socket fd duplicated from fileno() | fileno() -- return underlying file descriptor | getpeername() -- return remote address [*] | getsockname() -- return local address | getsockopt(level, optname[, buflen]) -- get socket options | gettimeout() -- return timeout or None | listen([n]) -- start listening for incoming connections | recv(buflen[, flags]) -- receive data | recv_into(buffer[, nbytes[, flags]]) -- receive data (into a buffer) | recvfrom(buflen[, flags]) -- receive data and sender's address | recvfrom_into(buffer[, nbytes, [, flags]) | -- receive data and sender's address (into a buffer) | sendall(data[, flags]) -- send all data | send(data[, flags]) -- send data, may not send all of it | sendto(data[, flags], addr) -- send data to a given address | setblocking(bool) -- set or clear the blocking I/O flag | getblocking() -- return True if socket is blocking, False if non-blocking | setsockopt(level, optname, value[, optlen]) -- set socket options | settimeout(None | float) -- set or clear the timeout | shutdown(how) -- shut down traffic in one or both directions | | [*] not available on all platforms! | | Methods defined here: | | __del__(...) | | __getattribute__(self, name, /) | Return getattr(self, name). | | __init__(self, /, *args, **kwargs) | Initialize self. See help(type(self)) for accurate signature. | | __repr__(self, /) | Return repr(self). | | bind(...) | bind(address) | | Bind the socket to a local address. For IP sockets, the address is a | pair (host, port); the host must refer to the local host. For raw packet | sockets the address is a tuple (ifname, proto [,pkttype [,hatype [,addr]]]) | | close(...) | close() | | Close the socket. It cannot be used after this call. | | connect(...) | connect(address) | | Connect the socket to a remote address. For IP sockets, the address | is a pair (host, port). | | connect_ex(...) | connect_ex(address) -> errno | | This is like connect(address), but returns an error code (the errno value) | instead of raising an exception when an error occurs. | | detach(...) | detach() | | Close the socket object without closing the underlying file descriptor. | The object cannot be used after this call, but the file descriptor | can be reused for other purposes. The file descriptor is returned. | | fileno(...) | fileno() -> integer | | Return the integer file descriptor of the socket. | | getblocking(...) | getblocking() | | Returns True if socket is in blocking mode, or False if it | is in non-blocking mode. | | getpeername(...) | getpeername() -> address info | | Return the address of the remote endpoint. For IP sockets, the address | info is a pair (hostaddr, port). | | getsockname(...) | getsockname() -> address info | | Return the address of the local endpoint. The format depends on the | address family. For IPv4 sockets, the address info is a pair | (hostaddr, port). | | getsockopt(...) | getsockopt(level, option[, buffersize]) -> value | | Get a socket option. See the Unix manual for level and option. | If a nonzero buffersize argument is given, the return value is a | string of that length; otherwise it is an integer. | | gettimeout(...) | gettimeout() -> timeout | | Returns the timeout in seconds (float) associated with socket | operations. A timeout of None indicates that timeouts on socket | operations are disabled. | | listen(...) | listen([backlog]) | | Enable a server to accept connections. If backlog is specified, it must be | at least 0 (if it is lower, it is set to 0); it specifies the number of | unaccepted connections that the system will allow before refusing new | connections. If not specified, a default reasonable value is chosen. | | recv(...) | recv(buffersize[, flags]) -> data | | Receive up to buffersize bytes from the socket. For the optional flags | argument, see the Unix manual. When no data is available, block until | at least one byte is available or until the remote end is closed. When | the remote end is closed and all data is read, return the empty string. | | recv_into(...) | recv_into(buffer, [nbytes[, flags]]) -> nbytes_read | | A version of recv() that stores its data into a buffer rather than creating | a new string. Receive up to buffersize bytes from the socket. If buffersize | is not specified (or 0), receive up to the size available in the given buffer. | | See recv() for documentation about the flags. | | recvfrom(...) | recvfrom(buffersize[, flags]) -> (data, address info) | | Like recv(buffersize, flags) but also return the sender's address info. | | recvfrom_into(...) | recvfrom_into(buffer[, nbytes[, flags]]) -> (nbytes, address info) | | Like recv_into(buffer[, nbytes[, flags]]) but also return the sender's address info. | | recvmsg(...) | recvmsg(bufsize[, ancbufsize[, flags]]) -> (data, ancdata, msg_flags, address) | | Receive normal data (up to bufsize bytes) and ancillary data from the | socket. The ancbufsize argument sets the size in bytes of the | internal buffer used to receive the ancillary data; it defaults to 0, | meaning that no ancillary data will be received. Appropriate buffer | sizes for ancillary data can be calculated using CMSG_SPACE() or | CMSG_LEN(), and items which do not fit into the buffer might be | truncated or discarded. The flags argument defaults to 0 and has the | same meaning as for recv(). | | The return value is a 4-tuple: (data, ancdata, msg_flags, address). | The data item is a bytes object holding the non-ancillary data | received. The ancdata item is a list of zero or more tuples | (cmsg_level, cmsg_type, cmsg_data) representing the ancillary data | (control messages) received: cmsg_level and cmsg_type are integers | specifying the protocol level and protocol-specific type respectively, | and cmsg_data is a bytes object holding the associated data. The | msg_flags item is the bitwise OR of various flags indicating | conditions on the received message; see your system documentation for | details. If the receiving socket is unconnected, address is the | address of the sending socket, if available; otherwise, its value is | unspecified. | | If recvmsg() raises an exception after the system call returns, it | will first attempt to close any file descriptors received via the | SCM_RIGHTS mechanism. | | recvmsg_into(...) | recvmsg_into(buffers[, ancbufsize[, flags]]) -> (nbytes, ancdata, msg_flags, address) | | Receive normal data and ancillary data from the socket, scattering the | non-ancillary data into a series of buffers. The buffers argument | must be an iterable of objects that export writable buffers | (e.g. bytearray objects); these will be filled with successive chunks | of the non-ancillary data until it has all been written or there are | no more buffers. The ancbufsize argument sets the size in bytes of | the internal buffer used to receive the ancillary data; it defaults to | 0, meaning that no ancillary data will be received. Appropriate | buffer sizes for ancillary data can be calculated using CMSG_SPACE() | or CMSG_LEN(), and items which do not fit into the buffer might be | truncated or discarded. The flags argument defaults to 0 and has the | same meaning as for recv(). | | The return value is a 4-tuple: (nbytes, ancdata, msg_flags, address). | The nbytes item is the total number of bytes of non-ancillary data | written into the buffers. The ancdata item is a list of zero or more | tuples (cmsg_level, cmsg_type, cmsg_data) representing the ancillary | data (control messages) received: cmsg_level and cmsg_type are | integers specifying the protocol level and protocol-specific type | respectively, and cmsg_data is a bytes object holding the associated | data. The msg_flags item is the bitwise OR of various flags | indicating conditions on the received message; see your system | documentation for details. If the receiving socket is unconnected, | address is the address of the sending socket, if available; otherwise, | its value is unspecified. | | If recvmsg_into() raises an exception after the system call returns, | it will first attempt to close any file descriptors received via the | SCM_RIGHTS mechanism. | | send(...) | send(data[, flags]) -> count | | Send a data string to the socket. For the optional flags | argument, see the Unix manual. Return the number of bytes | sent; this may be less than len(data) if the network is busy. | | sendall(...) | sendall(data[, flags]) | | Send a data string to the socket. For the optional flags | argument, see the Unix manual. This calls send() repeatedly | until all data is sent. If an error occurs, it's impossible | to tell how much data has been sent. | | sendmsg(...) | sendmsg(buffers[, ancdata[, flags[, address]]]) -> count | | Send normal and ancillary data to the socket, gathering the | non-ancillary data from a series of buffers and concatenating it into | a single message. The buffers argument specifies the non-ancillary | data as an iterable of bytes-like objects (e.g. bytes objects). | The ancdata argument specifies the ancillary data (control messages) | as an iterable of zero or more tuples (cmsg_level, cmsg_type, | cmsg_data), where cmsg_level and cmsg_type are integers specifying the | protocol level and protocol-specific type respectively, and cmsg_data | is a bytes-like object holding the associated data. The flags | argument defaults to 0 and has the same meaning as for send(). If | address is supplied and not None, it sets a destination address for | the message. The return value is the number of bytes of non-ancillary | data sent. | | sendmsg_afalg(...) | sendmsg_afalg([msg], *, op[, iv[, assoclen[, flags=MSG_MORE]]]) | | Set operation mode, IV and length of associated data for an AF_ALG | operation socket. | | sendto(...) | sendto(data[, flags], address) -> count | | Like send(data, flags) but allows specifying the destination address. | For IP sockets, the address is a pair (hostaddr, port). | | setblocking(...) | setblocking(flag) | | Set the socket to blocking (flag is true) or non-blocking (false). | setblocking(True) is equivalent to settimeout(None); | setblocking(False) is equivalent to settimeout(0.0). | | setsockopt(...) | setsockopt(level, option, value: int) | setsockopt(level, option, value: buffer) | setsockopt(level, option, None, optlen: int) | | Set a socket option. See the Unix manual for level and option. | The value argument can either be an integer, a string buffer, or | None, optlen. | | settimeout(...) | settimeout(timeout) | | Set a timeout on socket operations. 'timeout' can be a float, | giving in seconds, or None. Setting a timeout of None disables | the timeout feature and is equivalent to setblocking(1). | Setting a timeout of zero is the same as setblocking(0). | | shutdown(...) | shutdown(flag) | | Shut down the reading side of the socket (flag == SHUT_RD), the writing side | of the socket (flag == SHUT_WR), or both ends (flag == SHUT_RDWR). | | ---------------------------------------------------------------------- | Static methods defined here: | | __new__(*args, **kwargs) from builtins.type | Create and return a new object. See help(type) for accurate signature. | | ---------------------------------------------------------------------- | Data descriptors defined here: | | family | the socket family | | proto | the socket protocol | | timeout | the socket timeout | | type | the socket type class gaierror(builtins.OSError) | Method resolution order: | gaierror | builtins.OSError | builtins.Exception | builtins.BaseException | builtins.object | | Data descriptors defined here: | | __weakref__ | list of weak references to the object (if defined) | | ---------------------------------------------------------------------- | Methods inherited from builtins.OSError: | | __init__(self, /, *args, **kwargs) | Initialize self. See help(type(self)) for accurate signature. | | __reduce__(...) | Helper for pickle. | | __str__(self, /) | Return str(self). | | ---------------------------------------------------------------------- | Static methods inherited from builtins.OSError: | | __new__(*args, **kwargs) from builtins.type | Create and return a new object. See help(type) for accurate signature. | | ---------------------------------------------------------------------- | Data descriptors inherited from builtins.OSError: | | characters_written | | errno | POSIX exception code | | filename | exception filename | | filename2 | second exception filename | | strerror | exception strerror | | ---------------------------------------------------------------------- | Methods inherited from builtins.BaseException: | | __delattr__(self, name, /) | Implement delattr(self, name). | | __getattribute__(self, name, /) | Return getattr(self, name). | | __repr__(self, /) | Return repr(self). | | __setattr__(self, name, value, /) | Implement setattr(self, name, value). | | __setstate__(...) | | with_traceback(...) | Exception.with_traceback(tb) -- | set self.__traceback__ to tb and return self. | | ---------------------------------------------------------------------- | Data descriptors inherited from builtins.BaseException: | | __cause__ | exception cause | | __context__ | exception context | | __dict__ | | __suppress_context__ | | __traceback__ | | args class herror(builtins.OSError) | Method resolution order: | herror | builtins.OSError | builtins.Exception | builtins.BaseException | builtins.object | | Data descriptors defined here: | | __weakref__ | list of weak references to the object (if defined) | | ---------------------------------------------------------------------- | Methods inherited from builtins.OSError: | | __init__(self, /, *args, **kwargs) | Initialize self. See help(type(self)) for accurate signature. | | __reduce__(...) | Helper for pickle. | | __str__(self, /) | Return str(self). | | ---------------------------------------------------------------------- | Static methods inherited from builtins.OSError: | | __new__(*args, **kwargs) from builtins.type | Create and return a new object. See help(type) for accurate signature. | | ---------------------------------------------------------------------- | Data descriptors inherited from builtins.OSError: | | characters_written | | errno | POSIX exception code | | filename | exception filename | | filename2 | second exception filename | | strerror | exception strerror | | ---------------------------------------------------------------------- | Methods inherited from builtins.BaseException: | | __delattr__(self, name, /) | Implement delattr(self, name). | | __getattribute__(self, name, /) | Return getattr(self, name). | | __repr__(self, /) | Return repr(self). | | __setattr__(self, name, value, /) | Implement setattr(self, name, value). | | __setstate__(...) | | with_traceback(...) | Exception.with_traceback(tb) -- | set self.__traceback__ to tb and return self. | | ---------------------------------------------------------------------- | Data descriptors inherited from builtins.BaseException: | | __cause__ | exception cause | | __context__ | exception context | | __dict__ | | __suppress_context__ | | __traceback__ | | args class socket(builtins.object) | socket(family=AF_INET, type=SOCK_STREAM, proto=0) -> socket object | socket(family=-1, type=-1, proto=-1, fileno=None) -> socket object | | Open a socket of the given type. The family argument specifies the | address family; it defaults to AF_INET. The type argument specifies | whether this is a stream (SOCK_STREAM, this is the default) | or datagram (SOCK_DGRAM) socket. The protocol argument defaults to 0, | specifying the default protocol. Keyword arguments are accepted. | The socket is created as non-inheritable. | | When a fileno is passed in, family, type and proto are auto-detected, | unless they are explicitly set. | | A socket object represents one endpoint of a network connection. | | Methods of socket objects (keyword arguments not allowed): | | _accept() -- accept connection, returning new socket fd and client address | bind(addr) -- bind the socket to a local address | close() -- close the socket | connect(addr) -- connect the socket to a remote address | connect_ex(addr) -- connect, return an error code instead of an exception | dup() -- return a new socket fd duplicated from fileno() | fileno() -- return underlying file descriptor | getpeername() -- return remote address [*] | getsockname() -- return local address | getsockopt(level, optname[, buflen]) -- get socket options | gettimeout() -- return timeout or None | listen([n]) -- start listening for incoming connections | recv(buflen[, flags]) -- receive data | recv_into(buffer[, nbytes[, flags]]) -- receive data (into a buffer) | recvfrom(buflen[, flags]) -- receive data and sender's address | recvfrom_into(buffer[, nbytes, [, flags]) | -- receive data and sender's address (into a buffer) | sendall(data[, flags]) -- send all data | send(data[, flags]) -- send data, may not send all of it | sendto(data[, flags], addr) -- send data to a given address | setblocking(bool) -- set or clear the blocking I/O flag | getblocking() -- return True if socket is blocking, False if non-blocking | setsockopt(level, optname, value[, optlen]) -- set socket options | settimeout(None | float) -- set or clear the timeout | shutdown(how) -- shut down traffic in one or both directions | | [*] not available on all platforms! | | Methods defined here: | | __del__(...) | | __getattribute__(self, name, /) | Return getattr(self, name). | | __init__(self, /, *args, **kwargs) | Initialize self. See help(type(self)) for accurate signature. | | __repr__(self, /) | Return repr(self). | | bind(...) | bind(address) | | Bind the socket to a local address. For IP sockets, the address is a | pair (host, port); the host must refer to the local host. For raw packet | sockets the address is a tuple (ifname, proto [,pkttype [,hatype [,addr]]]) | | close(...) | close() | | Close the socket. It cannot be used after this call. | | connect(...) | connect(address) | | Connect the socket to a remote address. For IP sockets, the address | is a pair (host, port). | | connect_ex(...) | connect_ex(address) -> errno | | This is like connect(address), but returns an error code (the errno value) | instead of raising an exception when an error occurs. | | detach(...) | detach() | | Close the socket object without closing the underlying file descriptor. | The object cannot be used after this call, but the file descriptor | can be reused for other purposes. The file descriptor is returned. | | fileno(...) | fileno() -> integer | | Return the integer file descriptor of the socket. | | getblocking(...) | getblocking() | | Returns True if socket is in blocking mode, or False if it | is in non-blocking mode. | | getpeername(...) | getpeername() -> address info | | Return the address of the remote endpoint. For IP sockets, the address | info is a pair (hostaddr, port). | | getsockname(...) | getsockname() -> address info | | Return the address of the local endpoint. The format depends on the | address family. For IPv4 sockets, the address info is a pair | (hostaddr, port). | | getsockopt(...) | getsockopt(level, option[, buffersize]) -> value | | Get a socket option. See the Unix manual for level and option. | If a nonzero buffersize argument is given, the return value is a | string of that length; otherwise it is an integer. | | gettimeout(...) | gettimeout() -> timeout | | Returns the timeout in seconds (float) associated with socket | operations. A timeout of None indicates that timeouts on socket | operations are disabled. | | listen(...) | listen([backlog]) | | Enable a server to accept connections. If backlog is specified, it must be | at least 0 (if it is lower, it is set to 0); it specifies the number of | unaccepted connections that the system will allow before refusing new | connections. If not specified, a default reasonable value is chosen. | | recv(...) | recv(buffersize[, flags]) -> data | | Receive up to buffersize bytes from the socket. For the optional flags | argument, see the Unix manual. When no data is available, block until | at least one byte is available or until the remote end is closed. When | the remote end is closed and all data is read, return the empty string. | | recv_into(...) | recv_into(buffer, [nbytes[, flags]]) -> nbytes_read | | A version of recv() that stores its data into a buffer rather than creating | a new string. Receive up to buffersize bytes from the socket. If buffersize | is not specified (or 0), receive up to the size available in the given buffer. | | See recv() for documentation about the flags. | | recvfrom(...) | recvfrom(buffersize[, flags]) -> (data, address info) | | Like recv(buffersize, flags) but also return the sender's address info. | | recvfrom_into(...) | recvfrom_into(buffer[, nbytes[, flags]]) -> (nbytes, address info) | | Like recv_into(buffer[, nbytes[, flags]]) but also return the sender's address info. | | recvmsg(...) | recvmsg(bufsize[, ancbufsize[, flags]]) -> (data, ancdata, msg_flags, address) | | Receive normal data (up to bufsize bytes) and ancillary data from the | socket. The ancbufsize argument sets the size in bytes of the | internal buffer used to receive the ancillary data; it defaults to 0, | meaning that no ancillary data will be received. Appropriate buffer | sizes for ancillary data can be calculated using CMSG_SPACE() or | CMSG_LEN(), and items which do not fit into the buffer might be | truncated or discarded. The flags argument defaults to 0 and has the | same meaning as for recv(). | | The return value is a 4-tuple: (data, ancdata, msg_flags, address). | The data item is a bytes object holding the non-ancillary data | received. The ancdata item is a list of zero or more tuples | (cmsg_level, cmsg_type, cmsg_data) representing the ancillary data | (control messages) received: cmsg_level and cmsg_type are integers | specifying the protocol level and protocol-specific type respectively, | and cmsg_data is a bytes object holding the associated data. The | msg_flags item is the bitwise OR of various flags indicating | conditions on the received message; see your system documentation for | details. If the receiving socket is unconnected, address is the | address of the sending socket, if available; otherwise, its value is | unspecified. | | If recvmsg() raises an exception after the system call returns, it | will first attempt to close any file descriptors received via the | SCM_RIGHTS mechanism. | | recvmsg_into(...) | recvmsg_into(buffers[, ancbufsize[, flags]]) -> (nbytes, ancdata, msg_flags, address) | | Receive normal data and ancillary data from the socket, scattering the | non-ancillary data into a series of buffers. The buffers argument | must be an iterable of objects that export writable buffers | (e.g. bytearray objects); these will be filled with successive chunks | of the non-ancillary data until it has all been written or there are | no more buffers. The ancbufsize argument sets the size in bytes of | the internal buffer used to receive the ancillary data; it defaults to | 0, meaning that no ancillary data will be received. Appropriate | buffer sizes for ancillary data can be calculated using CMSG_SPACE() | or CMSG_LEN(), and items which do not fit into the buffer might be | truncated or discarded. The flags argument defaults to 0 and has the | same meaning as for recv(). | | The return value is a 4-tuple: (nbytes, ancdata, msg_flags, address). | The nbytes item is the total number of bytes of non-ancillary data | written into the buffers. The ancdata item is a list of zero or more | tuples (cmsg_level, cmsg_type, cmsg_data) representing the ancillary | data (control messages) received: cmsg_level and cmsg_type are | integers specifying the protocol level and protocol-specific type | respectively, and cmsg_data is a bytes object holding the associated | data. The msg_flags item is the bitwise OR of various flags | indicating conditions on the received message; see your system | documentation for details. If the receiving socket is unconnected, | address is the address of the sending socket, if available; otherwise, | its value is unspecified. | | If recvmsg_into() raises an exception after the system call returns, | it will first attempt to close any file descriptors received via the | SCM_RIGHTS mechanism. | | send(...) | send(data[, flags]) -> count | | Send a data string to the socket. For the optional flags | argument, see the Unix manual. Return the number of bytes | sent; this may be less than len(data) if the network is busy. | | sendall(...) | sendall(data[, flags]) | | Send a data string to the socket. For the optional flags | argument, see the Unix manual. This calls send() repeatedly | until all data is sent. If an error occurs, it's impossible | to tell how much data has been sent. | | sendmsg(...) | sendmsg(buffers[, ancdata[, flags[, address]]]) -> count | | Send normal and ancillary data to the socket, gathering the | non-ancillary data from a series of buffers and concatenating it into | a single message. The buffers argument specifies the non-ancillary | data as an iterable of bytes-like objects (e.g. bytes objects). | The ancdata argument specifies the ancillary data (control messages) | as an iterable of zero or more tuples (cmsg_level, cmsg_type, | cmsg_data), where cmsg_level and cmsg_type are integers specifying the | protocol level and protocol-specific type respectively, and cmsg_data | is a bytes-like object holding the associated data. The flags | argument defaults to 0 and has the same meaning as for send(). If | address is supplied and not None, it sets a destination address for | the message. The return value is the number of bytes of non-ancillary | data sent. | | sendmsg_afalg(...) | sendmsg_afalg([msg], *, op[, iv[, assoclen[, flags=MSG_MORE]]]) | | Set operation mode, IV and length of associated data for an AF_ALG | operation socket. | | sendto(...) | sendto(data[, flags], address) -> count | | Like send(data, flags) but allows specifying the destination address. | For IP sockets, the address is a pair (hostaddr, port). | | setblocking(...) | setblocking(flag) | | Set the socket to blocking (flag is true) or non-blocking (false). | setblocking(True) is equivalent to settimeout(None); | setblocking(False) is equivalent to settimeout(0.0). | | setsockopt(...) | setsockopt(level, option, value: int) | setsockopt(level, option, value: buffer) | setsockopt(level, option, None, optlen: int) | | Set a socket option. See the Unix manual for level and option. | The value argument can either be an integer, a string buffer, or | None, optlen. | | settimeout(...) | settimeout(timeout) | | Set a timeout on socket operations. 'timeout' can be a float, | giving in seconds, or None. Setting a timeout of None disables | the timeout feature and is equivalent to setblocking(1). | Setting a timeout of zero is the same as setblocking(0). | | shutdown(...) | shutdown(flag) | | Shut down the reading side of the socket (flag == SHUT_RD), the writing side | of the socket (flag == SHUT_WR), or both ends (flag == SHUT_RDWR). | | ---------------------------------------------------------------------- | Static methods defined here: | | __new__(*args, **kwargs) from builtins.type | Create and return a new object. See help(type) for accurate signature. | | ---------------------------------------------------------------------- | Data descriptors defined here: | | family | the socket family | | proto | the socket protocol | | timeout | the socket timeout | | type | the socket type FUNCTIONS CMSG_LEN(...) CMSG_LEN(length) -> control message length Return the total length, without trailing padding, of an ancillary data item with associated data of the given length. This value can often be used as the buffer size for recvmsg() to receive a single item of ancillary data, but RFC 3542 requires portable applications to use CMSG_SPACE() and thus include space for padding, even when the item will be the last in the buffer. Raises OverflowError if length is outside the permissible range of values. CMSG_SPACE(...) CMSG_SPACE(length) -> buffer size Return the buffer size needed for recvmsg() to receive an ancillary data item with associated data of the given length, along with any trailing padding. The buffer space needed to receive multiple items is the sum of the CMSG_SPACE() values for their associated data lengths. Raises OverflowError if length is outside the permissible range of values. close(...) close(integer) -> None Close an integer socket file descriptor. This is like os.close(), but for sockets; on some platforms os.close() won't work for socket file descriptors. dup(...) dup(integer) -> integer Duplicate an integer socket file descriptor. This is like os.dup(), but for sockets; on some platforms os.dup() won't work for socket file descriptors. getaddrinfo(...) getaddrinfo(host, port [, family, type, proto, flags]) -> list of (family, type, proto, canonname, sockaddr) Resolve host and port into addrinfo struct. getdefaulttimeout(...) getdefaulttimeout() -> timeout Returns the default timeout in seconds (float) for new socket objects. A value of None indicates that new socket objects have no timeout. When the socket module is first imported, the default is None. gethostbyaddr(...) gethostbyaddr(host) -> (name, aliaslist, addresslist) Return the true host name, a list of aliases, and a list of IP addresses, for a host. The host argument is a string giving a host name or IP number. gethostbyname(...) gethostbyname(host) -> address Return the IP address (a string of the form '255.255.255.255') for a host. gethostbyname_ex(...) gethostbyname_ex(host) -> (name, aliaslist, addresslist) Return the true host name, a list of aliases, and a list of IP addresses, for a host. The host argument is a string giving a host name or IP number. gethostname(...) gethostname() -> string Return the current host name. getnameinfo(...) getnameinfo(sockaddr, flags) --> (host, port) Get host and port for a sockaddr. getprotobyname(...) getprotobyname(name) -> integer Return the protocol number for the named protocol. (Rarely used.) getservbyname(...) getservbyname(servicename[, protocolname]) -> integer Return a port number from a service name and protocol name. The optional protocol name, if given, should be 'tcp' or 'udp', otherwise any protocol will match. getservbyport(...) getservbyport(port[, protocolname]) -> string Return the service name from a port number and protocol name. The optional protocol name, if given, should be 'tcp' or 'udp', otherwise any protocol will match. htonl(...) htonl(integer) -> integer Convert a 32-bit integer from host to network byte order. htons(...) htons(integer) -> integer Convert a 16-bit unsigned integer from host to network byte order. if_indextoname(...) if_indextoname(if_index) Returns the interface name corresponding to the interface index if_index. if_nameindex(...) if_nameindex() Returns a list of network interface information (index, name) tuples. if_nametoindex(...) if_nametoindex(if_name) Returns the interface index corresponding to the interface name if_name. inet_aton(...) inet_aton(string) -> bytes giving packed 32-bit IP representation Convert an IP address in string format (123.45.67.89) to the 32-bit packed binary format used in low-level network functions. inet_ntoa(...) inet_ntoa(packed_ip) -> ip_address_string Convert an IP address from 32-bit packed binary format to string format inet_ntop(...) inet_ntop(af, packed_ip) -> string formatted IP address Convert a packed IP address of the given family to string format. inet_pton(...) inet_pton(af, ip) -> packed IP address string Convert an IP address from string format to a packed string suitable for use with low-level network functions. ntohl(...) ntohl(integer) -> integer Convert a 32-bit integer from network to host byte order. ntohs(...) ntohs(integer) -> integer Convert a 16-bit unsigned integer from network to host byte order. setdefaulttimeout(...) setdefaulttimeout(timeout) Set the default timeout in seconds (float) for new socket objects. A value of None indicates that new socket objects have no timeout. When the socket module is first imported, the default is None. sethostname(...) sethostname(name) Sets the hostname to name. socketpair(...) socketpair([family[, type [, proto]]]) -> (socket object, socket object) Create a pair of socket objects from the sockets returned by the platform socketpair() function. The arguments are the same as for socket() except the default family is AF_UNIX if defined on the platform; otherwise, the default is AF_INET. DATA AF_ALG = 38 AF_APPLETALK = 5 AF_ASH = 18 AF_ATMPVC = 8 AF_ATMSVC = 20 AF_AX25 = 3 AF_BLUETOOTH = 31 AF_BRIDGE = 7 AF_CAN = 29 AF_DECnet = 12 AF_ECONET = 19 AF_INET = 2 AF_INET6 = 10 AF_IPX = 4 AF_IRDA = 23 AF_KEY = 15 AF_LLC = 26 AF_NETBEUI = 13 AF_NETLINK = 16 AF_NETROM = 6 AF_PACKET = 17 AF_PPPOX = 24 AF_QIPCRTR = 42 AF_RDS = 21 AF_ROSE = 11 AF_ROUTE = 16 AF_SECURITY = 14 AF_SNA = 22 AF_TIPC = 30 AF_UNIX = 1 AF_UNSPEC = 0 AF_VSOCK = 40 AF_WANPIPE = 25 AF_X25 = 9 AI_ADDRCONFIG = 32 AI_ALL = 16 AI_CANONNAME = 2 AI_NUMERICHOST = 4 AI_NUMERICSERV = 1024 AI_PASSIVE = 1 AI_V4MAPPED = 8 ALG_OP_DECRYPT = 0 ALG_OP_ENCRYPT = 1 ALG_OP_SIGN = 2 ALG_OP_VERIFY = 3 ALG_SET_AEAD_ASSOCLEN = 4 ALG_SET_AEAD_AUTHSIZE = 5 ALG_SET_IV = 2 ALG_SET_KEY = 1 ALG_SET_OP = 3 ALG_SET_PUBKEY = 6 BDADDR_ANY = '00:00:00:00:00:00' BDADDR_LOCAL = '00:00:00:FF:FF:FF' BTPROTO_HCI = 1 BTPROTO_L2CAP = 0 BTPROTO_RFCOMM = 3 BTPROTO_SCO = 2 CAN_BCM = 2 CAN_BCM_CAN_FD_FRAME = 2048 CAN_BCM_RX_ANNOUNCE_RESUME = 256 CAN_BCM_RX_CHANGED = 12 CAN_BCM_RX_CHECK_DLC = 64 CAN_BCM_RX_DELETE = 6 CAN_BCM_RX_FILTER_ID = 32 CAN_BCM_RX_NO_AUTOTIMER = 128 CAN_BCM_RX_READ = 7 CAN_BCM_RX_RTR_FRAME = 1024 CAN_BCM_RX_SETUP = 5 CAN_BCM_RX_STATUS = 10 CAN_BCM_RX_TIMEOUT = 11 CAN_BCM_SETTIMER = 1 CAN_BCM_STARTTIMER = 2 CAN_BCM_TX_ANNOUNCE = 8 CAN_BCM_TX_COUNTEVT = 4 CAN_BCM_TX_CP_CAN_ID = 16 CAN_BCM_TX_DELETE = 2 CAN_BCM_TX_EXPIRED = 9 CAN_BCM_TX_READ = 3 CAN_BCM_TX_RESET_MULTI_IDX = 512 CAN_BCM_TX_SEND = 4 CAN_BCM_TX_SETUP = 1 CAN_BCM_TX_STATUS = 8 CAN_EFF_FLAG = 2147483648 CAN_EFF_MASK = 536870911 CAN_ERR_FLAG = 536870912 CAN_ERR_MASK = 536870911 CAN_ISOTP = 6 CAN_J1939 = 7 CAN_RAW = 1 CAN_RAW_ERR_FILTER = 2 CAN_RAW_FD_FRAMES = 5 CAN_RAW_FILTER = 1 CAN_RAW_JOIN_FILTERS = 6 CAN_RAW_LOOPBACK = 3 CAN_RAW_RECV_OWN_MSGS = 4 CAN_RTR_FLAG = 1073741824 CAN_SFF_MASK = 2047 CAPI = <capsule object "_socket.CAPI"> EAI_ADDRFAMILY = -9 EAI_AGAIN = -3 EAI_BADFLAGS = -1 EAI_FAIL = -4 EAI_FAMILY = -6 EAI_MEMORY = -10 EAI_NODATA = -5 EAI_NONAME = -2 EAI_OVERFLOW = -12 EAI_SERVICE = -8 EAI_SOCKTYPE = -7 EAI_SYSTEM = -11 HCI_DATA_DIR = 1 HCI_FILTER = 2 HCI_TIME_STAMP = 3 INADDR_ALLHOSTS_GROUP = 3758096385 INADDR_ANY = 0 INADDR_BROADCAST = 4294967295 INADDR_LOOPBACK = 2130706433 INADDR_MAX_LOCAL_GROUP = 3758096639 INADDR_NONE = 4294967295 INADDR_UNSPEC_GROUP = 3758096384 IOCTL_VM_SOCKETS_GET_LOCAL_CID = 1977 IPPORT_RESERVED = 1024 IPPORT_USERRESERVED = 5000 IPPROTO_AH = 51 IPPROTO_DSTOPTS = 60 IPPROTO_EGP = 8 IPPROTO_ESP = 50 IPPROTO_FRAGMENT = 44 IPPROTO_GRE = 47 IPPROTO_HOPOPTS = 0 IPPROTO_ICMP = 1 IPPROTO_ICMPV6 = 58 IPPROTO_IDP = 22 IPPROTO_IGMP = 2 IPPROTO_IP = 0 IPPROTO_IPIP = 4 IPPROTO_IPV6 = 41 IPPROTO_MPTCP = 262 IPPROTO_NONE = 59 IPPROTO_PIM = 103 IPPROTO_PUP = 12 IPPROTO_RAW = 255 IPPROTO_ROUTING = 43 IPPROTO_RSVP = 46 IPPROTO_SCTP = 132 IPPROTO_TCP = 6 IPPROTO_TP = 29 IPPROTO_UDP = 17 IPPROTO_UDPLITE = 136 IPV6_CHECKSUM = 7 IPV6_DONTFRAG = 62 IPV6_DSTOPTS = 59 IPV6_HOPLIMIT = 52 IPV6_HOPOPTS = 54 IPV6_JOIN_GROUP = 20 IPV6_LEAVE_GROUP = 21 IPV6_MULTICAST_HOPS = 18 IPV6_MULTICAST_IF = 17 IPV6_MULTICAST_LOOP = 19 IPV6_NEXTHOP = 9 IPV6_PATHMTU = 61 IPV6_PKTINFO = 50 IPV6_RECVDSTOPTS = 58 IPV6_RECVHOPLIMIT = 51 IPV6_RECVHOPOPTS = 53 IPV6_RECVPATHMTU = 60 IPV6_RECVPKTINFO = 49 IPV6_RECVRTHDR = 56 IPV6_RECVTCLASS = 66 IPV6_RTHDR = 57 IPV6_RTHDRDSTOPTS = 55 IPV6_RTHDR_TYPE_0 = 0 IPV6_TCLASS = 67 IPV6_UNICAST_HOPS = 16 IPV6_V6ONLY = 26 IP_ADD_MEMBERSHIP = 35 IP_DEFAULT_MULTICAST_LOOP = 1 IP_DEFAULT_MULTICAST_TTL = 1 IP_DROP_MEMBERSHIP = 36 IP_HDRINCL = 3 IP_MAX_MEMBERSHIPS = 20 IP_MULTICAST_IF = 32 IP_MULTICAST_LOOP = 34 IP_MULTICAST_TTL = 33 IP_OPTIONS = 4 IP_RECVOPTS = 6 IP_RECVRETOPTS = 7 IP_RECVTOS = 13 IP_RETOPTS = 7 IP_TOS = 1 IP_TRANSPARENT = 19 IP_TTL = 2 J1939_EE_INFO_NONE = 0 J1939_EE_INFO_TX_ABORT = 1 J1939_FILTER_MAX = 512 J1939_IDLE_ADDR = 254 J1939_MAX_UNICAST_ADDR = 253 J1939_NLA_BYTES_ACKED = 1 J1939_NLA_PAD = 0 J1939_NO_ADDR = 255 J1939_NO_NAME = 0 J1939_NO_PGN = 262144 J1939_PGN_ADDRESS_CLAIMED = 60928 J1939_PGN_ADDRESS_COMMANDED = 65240 J1939_PGN_MAX = 262143 J1939_PGN_PDU1_MAX = 261888 J1939_PGN_REQUEST = 59904 MSG_CMSG_CLOEXEC = 1073741824 MSG_CONFIRM = 2048 MSG_CTRUNC = 8 MSG_DONTROUTE = 4 MSG_DONTWAIT = 64 MSG_EOR = 128 MSG_ERRQUEUE = 8192 MSG_FASTOPEN = 536870912 MSG_MORE = 32768 MSG_NOSIGNAL = 16384 MSG_OOB = 1 MSG_PEEK = 2 MSG_TRUNC = 32 MSG_WAITALL = 256 NETLINK_CRYPTO = 21 NETLINK_DNRTMSG = 14 NETLINK_FIREWALL = 3 NETLINK_IP6_FW = 13 NETLINK_NFLOG = 5 NETLINK_ROUTE = 0 NETLINK_USERSOCK = 2 NETLINK_XFRM = 6 NI_DGRAM = 16 NI_MAXHOST = 1025 NI_MAXSERV = 32 NI_NAMEREQD = 8 NI_NOFQDN = 4 NI_NUMERICHOST = 1 NI_NUMERICSERV = 2 PACKET_BROADCAST = 1 PACKET_FASTROUTE = 6 PACKET_HOST = 0 PACKET_LOOPBACK = 5 PACKET_MULTICAST = 2 PACKET_OTHERHOST = 3 PACKET_OUTGOING = 4 PF_CAN = 29 PF_PACKET = 17 PF_RDS = 21 SCM_CREDENTIALS = 2 SCM_J1939_DEST_ADDR = 1 SCM_J1939_DEST_NAME = 2 SCM_J1939_ERRQUEUE = 4 SCM_J1939_PRIO = 3 SCM_RIGHTS = 1 SHUT_RD = 0 SHUT_RDWR = 2 SHUT_WR = 1 SOCK_CLOEXEC = 524288 SOCK_DGRAM = 2 SOCK_NONBLOCK = 2048 SOCK_RAW = 3 SOCK_RDM = 4 SOCK_SEQPACKET = 5 SOCK_STREAM = 1 SOL_ALG = 279 SOL_CAN_BASE = 100 SOL_CAN_RAW = 101 SOL_HCI = 0 SOL_IP = 0 SOL_RDS = 276 SOL_SOCKET = 1 SOL_TCP = 6 SOL_TIPC = 271 SOL_UDP = 17 SOMAXCONN = 4096 SO_ACCEPTCONN = 30 SO_BINDTODEVICE = 25 SO_BROADCAST = 6 SO_DEBUG = 1 SO_DOMAIN = 39 SO_DONTROUTE = 5 SO_ERROR = 4 SO_J1939_ERRQUEUE = 4 SO_J1939_FILTER = 1 SO_J1939_PROMISC = 2 SO_J1939_SEND_PRIO = 3 SO_KEEPALIVE = 9 SO_LINGER = 13 SO_MARK = 36 SO_OOBINLINE = 10 SO_PASSCRED = 16 SO_PASSSEC = 34 SO_PEERCRED = 17 SO_PEERSEC = 31 SO_PRIORITY = 12 SO_PROTOCOL = 38 SO_RCVBUF = 8 SO_RCVLOWAT = 18 SO_RCVTIMEO = 20 SO_REUSEADDR = 2 SO_REUSEPORT = 15 SO_SNDBUF = 7 SO_SNDLOWAT = 19 SO_SNDTIMEO = 21 SO_TYPE = 3 SO_VM_SOCKETS_BUFFER_MAX_SIZE = 2 SO_VM_SOCKETS_BUFFER_MIN_SIZE = 1 SO_VM_SOCKETS_BUFFER_SIZE = 0 TCP_CONGESTION = 13 TCP_CORK = 3 TCP_DEFER_ACCEPT = 9 TCP_FASTOPEN = 23 TCP_INFO = 11 TCP_KEEPCNT = 6 TCP_KEEPIDLE = 4 TCP_KEEPINTVL = 5 TCP_LINGER2 = 8 TCP_MAXSEG = 2 TCP_NODELAY = 1 TCP_NOTSENT_LOWAT = 25 TCP_QUICKACK = 12 TCP_SYNCNT = 7 TCP_USER_TIMEOUT = 18 TCP_WINDOW_CLAMP = 10 TIPC_ADDR_ID = 3 TIPC_ADDR_NAME = 2 TIPC_ADDR_NAMESEQ = 1 TIPC_CFG_SRV = 0 TIPC_CLUSTER_SCOPE = 2 TIPC_CONN_TIMEOUT = 130 TIPC_CRITICAL_IMPORTANCE = 3 TIPC_DEST_DROPPABLE = 129 TIPC_HIGH_IMPORTANCE = 2 TIPC_IMPORTANCE = 127 TIPC_LOW_IMPORTANCE = 0 TIPC_MEDIUM_IMPORTANCE = 1 TIPC_NODE_SCOPE = 3 TIPC_PUBLISHED = 1 TIPC_SRC_DROPPABLE = 128 TIPC_SUBSCR_TIMEOUT = 3 TIPC_SUB_CANCEL = 4 TIPC_SUB_PORTS = 1 TIPC_SUB_SERVICE = 2 TIPC_TOP_SRV = 1 TIPC_WAIT_FOREVER = -1 TIPC_WITHDRAWN = 2 TIPC_ZONE_SCOPE = 1 UDPLITE_RECV_CSCOV = 11 UDPLITE_SEND_CSCOV = 10 VMADDR_CID_ANY = 4294967295 VMADDR_CID_HOST = 2 VMADDR_PORT_ANY = 4294967295 VM_SOCKETS_INVALID_VERSION = 4294967295 has_ipv6 = True FILE (built-in)
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