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test matplotlib 2d
Target List TLV
Add functionality for Target List TLV
non-blocking socket for receiving
https://docs.python.org/3/library/socket.html#notes-on-socket-timeouts
Notes on socket timeouts
A socket object can be in one of three modes: blocking, non-blocking, or timeout. Sockets are by default always created in blocking mode, but this can be changed by calling setdefaulttimeout().
In blocking mode, operations block until complete or the system returns an error (such as connection timed out).
In non-blocking mode, operations fail (with an error that is unfortunately system-dependent) if they cannot be completed immediately: functions from the select can be used to know when and whether a socket is available for reading or writing.
In timeout mode, operations fail if they cannot be completed within the timeout specified for the socket (they raise a timeout exception) or if the system returns an error.
Note At the operating system level, sockets in timeout mode are internally set in non-blocking mode. Also, the blocking and timeout modes are shared between file descriptors and socket objects that refer to the same network endpoint. This implementation detail can have visible consequences if e.g. you decide to use the fileno() of a socket.
Timeouts and the connect method
The connect() operation is also subject to the timeout setting, and in general it is recommended to call settimeout() before calling connect() or pass a timeout parameter to create_connection(). However, the system network stack may also return a connection timeout error of its own regardless of any Python socket timeout setting.
Timeouts and the accept method
If getdefaulttimeout() is not None, sockets returned by the accept() method inherit that timeout. Otherwise, the behaviour depends on settings of the listening socket:
if the listening socket is in blocking mode or in timeout mode, the socket returned by accept() is in blocking mode;
if the listening socket is in non-blocking mode, whether the socket returned by accept() is in blocking or non-blocking mode is operating system-dependent. If you want to ensure cross-platform behaviour, it is recommended you manually override this setting.
https://docs.python.org/3/library/socket.html#socket.setdefaulttimeout
socket.setdefaulttimeout(timeout)
Set the default timeout in seconds (float) for new socket objects. When the socket module is first imported, the default is None. See settimeout() for possible values and their respective meanings.
https://docs.python.org/3/library/socket.html#socket.socket.settimeout
socket.settimeout(value)
Set a timeout on blocking socket operations. The value argument can be a nonnegative floating point number expressing seconds, or None. If a non-zero value is given, subsequent socket operations will raise a timeout exception if the timeout period value has elapsed before the operation has completed. If zero is given, the socket is put in non-blocking mode. If None is given, the socket is put in blocking mode.
For further information, please consult the notes on socket timeouts.
Changed in version 3.7: The method no longer toggles SOCK_NONBLOCK flag on socket.type.
test matplotlib 3d
Implement dual source: file and uart
Add uart source as option.
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