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- threading.Thread(builtins.object)
-
- JoinThread
- StoppableThread
class JoinThread(threading.Thread) |
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JoinThread - The workhouse that stops the StoppableThread.
Takes an exception, and upon being started immediately raises that exception in the current context
of the thread's execution (so next line of python gets it, or next call to a python api function in C code ).
@see StoppableThread for more details
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- Method resolution order:
- JoinThread
- threading.Thread
- builtins.object
Methods defined here:
- __init__(self, otherThread, exception, repeatEvery=2.0)
- __init__ - Create a JoinThread (don't forget to call .start() ! )
@param otherThread <threading.Thread> - A thread
@param exception <BaseException> - An exception. Should be a BaseException, to prevent "catch Exception as e: continue" type code
from never being terminated. If such code is unavoidable, you can try setting #repeatEvery to a very low number, like .00001,
and it will hopefully raise within the context of the catch, and be able to break free.
@param repeatEvery <float> Default 2.0 - After starting, the given exception is immediately raised. Then, every #repeatEvery seconds,
it is raised again, until the thread terminates.
- run(self)
- run - The thread main. Will attempt to stop and join the attached thread.
Methods inherited from threading.Thread:
- __repr__(self)
- Return repr(self).
- getName(self)
- isAlive = is_alive(self)
- Return whether the thread is alive.
This method returns True just before the run() method starts until just
after the run() method terminates. The module function enumerate()
returns a list of all alive threads.
- isDaemon(self)
- is_alive(self)
- Return whether the thread is alive.
This method returns True just before the run() method starts until just
after the run() method terminates. The module function enumerate()
returns a list of all alive threads.
- join(self, timeout=None)
- Wait until the thread terminates.
This blocks the calling thread until the thread whose join() method is
called terminates -- either normally or through an unhandled exception
or until the optional timeout occurs.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof). As join() always returns None, you must call
isAlive() after join() to decide whether a timeout happened -- if the
thread is still alive, the join() call timed out.
When the timeout argument is not present or None, the operation will
block until the thread terminates.
A thread can be join()ed many times.
join() raises a RuntimeError if an attempt is made to join the current
thread as that would cause a deadlock. It is also an error to join() a
thread before it has been started and attempts to do so raises the same
exception.
- setDaemon(self, daemonic)
- setName(self, name)
- start(self)
- Start the thread's activity.
It must be called at most once per thread object. It arranges for the
object's run() method to be invoked in a separate thread of control.
This method will raise a RuntimeError if called more than once on the
same thread object.
Data descriptors inherited from threading.Thread:
- __dict__
- dictionary for instance variables (if defined)
- __weakref__
- list of weak references to the object (if defined)
- daemon
- A boolean value indicating whether this thread is a daemon thread.
This must be set before start() is called, otherwise RuntimeError is
raised. Its initial value is inherited from the creating thread; the
main thread is not a daemon thread and therefore all threads created in
the main thread default to daemon = False.
The entire Python program exits when no alive non-daemon threads are
left.
- ident
- Thread identifier of this thread or None if it has not been started.
This is a nonzero integer. See the thread.get_ident() function. Thread
identifiers may be recycled when a thread exits and another thread is
created. The identifier is available even after the thread has exited.
- name
- A string used for identification purposes only.
It has no semantics. Multiple threads may be given the same name. The
initial name is set by the constructor.
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class StoppableThread(threading.Thread) |
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StoppableThread - A thread that can be stopped by forcing an exception in the execution context.
This works both to interrupt code that is in C or in python code, at either the next call to a python function,
or the next line in python code.
It is recommended that if you call stop ( @see StoppableThread.stop ) that you use an exception that inherits BaseException, to ensure it likely isn't caught.
Also, beware unmarked exception handlers in your code. Code like this:
while True:
try:
doSomething()
except:
continue
will never be able to abort, because the exception you raise is immediately caught.
The exception is raised over and over, with a specifed delay (default 2.0 seconds)
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- Method resolution order:
- StoppableThread
- threading.Thread
- builtins.object
Methods defined here:
- stop(self, exception, raiseEvery=2.0)
- Stops the thread by raising a given exception.
@param exception <Exception> - Exception to throw. Likely, you want to use something
that inherits from BaseException (so except Exception as e: continue; isn't a problem)
Methods inherited from threading.Thread:
- __init__(self, group=None, target=None, name=None, args=(), kwargs=None, *, daemon=None)
- This constructor should always be called with keyword arguments. Arguments are:
*group* should be None; reserved for future extension when a ThreadGroup
class is implemented.
*target* is the callable object to be invoked by the run()
method. Defaults to None, meaning nothing is called.
*name* is the thread name. By default, a unique name is constructed of
the form "Thread-N" where N is a small decimal number.
*args* is the argument tuple for the target invocation. Defaults to ().
*kwargs* is a dictionary of keyword arguments for the target
invocation. Defaults to {}.
If a subclass overrides the constructor, it must make sure to invoke
the base class constructor (Thread.__init__()) before doing anything
else to the thread.
- __repr__(self)
- Return repr(self).
- getName(self)
- isAlive = is_alive(self)
- Return whether the thread is alive.
This method returns True just before the run() method starts until just
after the run() method terminates. The module function enumerate()
returns a list of all alive threads.
- isDaemon(self)
- is_alive(self)
- Return whether the thread is alive.
This method returns True just before the run() method starts until just
after the run() method terminates. The module function enumerate()
returns a list of all alive threads.
- join(self, timeout=None)
- Wait until the thread terminates.
This blocks the calling thread until the thread whose join() method is
called terminates -- either normally or through an unhandled exception
or until the optional timeout occurs.
When the timeout argument is present and not None, it should be a
floating point number specifying a timeout for the operation in seconds
(or fractions thereof). As join() always returns None, you must call
isAlive() after join() to decide whether a timeout happened -- if the
thread is still alive, the join() call timed out.
When the timeout argument is not present or None, the operation will
block until the thread terminates.
A thread can be join()ed many times.
join() raises a RuntimeError if an attempt is made to join the current
thread as that would cause a deadlock. It is also an error to join() a
thread before it has been started and attempts to do so raises the same
exception.
- run(self)
- Method representing the thread's activity.
You may override this method in a subclass. The standard run() method
invokes the callable object passed to the object's constructor as the
target argument, if any, with sequential and keyword arguments taken
from the args and kwargs arguments, respectively.
- setDaemon(self, daemonic)
- setName(self, name)
- start(self)
- Start the thread's activity.
It must be called at most once per thread object. It arranges for the
object's run() method to be invoked in a separate thread of control.
This method will raise a RuntimeError if called more than once on the
same thread object.
Data descriptors inherited from threading.Thread:
- __dict__
- dictionary for instance variables (if defined)
- __weakref__
- list of weak references to the object (if defined)
- daemon
- A boolean value indicating whether this thread is a daemon thread.
This must be set before start() is called, otherwise RuntimeError is
raised. Its initial value is inherited from the creating thread; the
main thread is not a daemon thread and therefore all threads created in
the main thread default to daemon = False.
The entire Python program exits when no alive non-daemon threads are
left.
- ident
- Thread identifier of this thread or None if it has not been started.
This is a nonzero integer. See the thread.get_ident() function. Thread
identifiers may be recycled when a thread exits and another thread is
created. The identifier is available even after the thread has exited.
- name
- A string used for identification purposes only.
It has no semantics. Multiple threads may be given the same name. The
initial name is set by the constructor.
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