modified: noblocking_turtle_shell.py

modified:   turtle_shell.py

controls/device.py

@@ -1,15 +1,16 @@
 from dataclasses import dataclass
 from typing import Optional, Collection, Any
-from abc import ABC, abstractmethod
-from enum import Enum, auto
+from abc import ABC, abstractmethod, abstractproperty
+from enum import Enum
+
 
 class DeviceLifecycleState(Enum):
-    INIT = "init"
-    OPEN = "open"
-    CLOSE = "close"
+    INIT = 0
+    OPEN = 1
+    CLOSE = 2
 
 
-class DevaceError(Exception):
+class DeviceError(Exception):
     pass
 
 
@@ -37,7 +38,6 @@ class ActionDescriptor:
 
 
 class Device(ABC):
-    # TODO(Homework #3)
     _state = DeviceLifecycleState.INIT
 
     @property
@@ -47,13 +47,11 @@ class Device(ABC):
     def close(self):
         self._state = DeviceLifecycleState.CLOSE
 
-    @property
-    @abstractmethod
+    @abstractproperty
     def trait_descriptors(self) -> Collection[TraitDescriptor]:
         pass
 
-    @property
-    @abstractmethod
+    @abstractproperty
     def action_descriptors(self) -> Collection[ActionDescriptor]:
         pass
 
@@ -71,7 +69,7 @@ class SynchronyDevice(Device):
     @abstractmethod
     def execute(self, action_name: str, *args, **kwargs):
         """Execute action `action_name`, using `args` and `kwargs` as action argument."""
-        pass
+        raise DeviceError
 
     @abstractmethod
     def read(self, trait_name: str) -> Any:
@@ -87,6 +85,3 @@ class SynchronyDevice(Device):
     def invalidate(self, trait_name: str):
         """Invalidate logical state of trait `trait_name`"""
         pass
-
-    def close(self):
-        return super().close()

equipment/turtle_device.py

@@ -1,73 +1,80 @@
-import time
 from turtle import Turtle
-from equipment.device import SynchronyDevice
-from equipment.device import Device
-import inspect
 from typing import Optional, Collection, Any
+from controls.device import *
+import inspect
+
 
 class TurtleDevice(SynchronyDevice):
     def open(self):
-        super().open()
         self.turtle = Turtle()
+        self.descriptors = dict(traits=dict(), actions=dict())
+        super().open()
 
     def close(self):
+        self.turtle.reset()
         super().close()
-        del self.turtle
 
-    @property
-    def trait_descriptors(self):
-        l = list()
-        for i in inspect.getmembers(TurtleDevice):
-            if not (i[0].startswith("__") or i[0].startswith("_")) and not inspect.isfunction(i[1]):
-                l.append(i[0])
-        return l
+    def trait_descriptors(self) -> Collection[TraitDescriptor]:
+        return self.get_descriptors()["traits"]
 
-    @property
-    def action_descriptors(self):
-        l = list()
-        #print(inspect.getmembers(TurtleDevice))
-        #for i in dir(TurtleDevice):
-        #    # print(type(getattr(TurtleDevice(), i))=='method')
-        #    # if not i.startswith("__") and type(getattr(TurtleDevice(), i)) == types.MethodType:
-        #    if not i.startswith("__") and inspect.isroutine(inspect.getattr_static(TurtleDevice, i)):
-        #        sig = inspect.signature(getattr(TurtleDevice, i))
-        #        l.append(i + " " + str(sig))
-        #return l
-        for i in inspect.getmembers(TurtleDevice):
-            # print(type(getattr(TurtleDevice, i)))
-            # print(type(getattr(TurtleDevice(), i))=='method')
-            if not (i[0].startswith("__") or i[0].startswith("_")) and inspect.isfunction(i[1]):
-                sig = inspect.signature(getattr(TurtleDevice, i[0]))
-                l.append(i[0]+str(sig))
-        return l
-
-    def execute(self, action_name: str, *args, **kwargs):
-        """Execute action `action_name`, using `args` and `kwargs` as action argument."""
-        if self.state == 1:
-            f = getattr(self.turtle, action_name)
-            f(int(*args), **kwargs)
-        else:
-            print("It's not opened")
-            self.open()
-            #time.sleep(30)
-            f = getattr(self.turtle, action_name)
-            f(int(*args), **kwargs)
-
-    def read(self, trait_name: str):
-        """Read physical state of trait `trait_name` from device."""
-        return getattr(self.turtle, trait_name)
-
-    def write(self, trait_name: str, value: Any) -> bool:
-        """Pass `value` to trait `trait_name` of device."""
-        setattr(self.turtle, trait_name, value)
-
-    def invalidate(self, trait_name: str):
-        """Invalidate logical state of trait `trait_name`"""
-        if self.read(trait_name) == self.__getitem__(trait_name):
-            print("Everything's okey")
-        else:
-            print(f"Something went wrong with {trait_name}.")
+    def action_descriptors(self) -> Collection[ActionDescriptor]:
+        return self.get_descriptors()["actions"]
 
     def __getitem__(self, trait_name: str) -> Optional[Any]:
         """Return logical state of trait `trait_name`."""
-        return getattr(self, trait_name)
+        return self.descriptors[trait_name]
+
+    def read_descriptors(self, arg):
+        self.descriptors = self.get_descriptors()
+        return self.descriptors
+
+    def read(self, trait_name: str) -> Any:
+        """Read physical state of trait `trait_name` from device."""
+        self.read_descriptors()
+        return self.descriptors[trait_name]
+
+    def write(self, trait_name: str, value: Any) -> bool:
+        """Turtle traits are not writable"""
+        # trait_desc = self.trait_descriptors.get(trait_name)
+        # if trait_desc.writable:
+        #     return getattr(self.turtle, trait_name)(value)
+        super().write()
+
+    def execute(self, action_name: str, *args, **kwargs):
+        """Execute action `action_name`, using `args` and `kwargs` as action argument."""
+        action = self.get_descriptors()["actions"].get(action_name)
+        if action:
+            getattr(self.turtle, action_name)(*args, **kwargs)
+            return
+        else:
+            raise DeviceError("No such action: `{}`".format(action_name))
+
+    def invalidate(self, trait_name: str):
+        """Invalidate logical state of trait `trait_name`"""
+        if self.trait_descriptors.get(trait_name):
+            self.trait_descriptors[trait_name] = None
+        raise DeviceError()
+
+    def get_descriptors(self):
+        descriptors = dict(actions=dict(), traits=dict())
+
+        for m_name, member in inspect.getmembers(Turtle):
+            if m_name.startswith("_"):
+                continue
+            if m_name.lower() != m_name:
+                continue
+            doc = inspect.getdoc(member)
+            if doc is None:
+                continue
+
+            if not inspect.isfunction(member):
+                descriptors["traits"][m_name] = TraitDescriptor(
+                    m_name, doc, readable=True, writable=False
+                )
+            else:
+                sig = inspect.signature(member)
+                params_dict = dict(sig.parameters)
+                descriptors["actions"][m_name] = ActionDescriptor(
+                    m_name, arguments=params_dict, info=doc
+                )
+        return descriptors

noblocking_turtle_shell.py

@@ -1,62 +1,76 @@
 import cmd
 import threading
-from queue import Empty, Queue
+from queue import Queue
+from turtle import forward
 from equipment.turtle_device import TurtleDevice
-import argparse
-import time
 
 
 class TurtleDeviceThread(threading.Thread):
-    # TODO(Homework 4)
     def __init__(self):
         super().__init__()
         self.device = TurtleDevice()
-        self.queue = Queue()
-        self.event = Event()
+
+        self.queue = Queue[tuple]()
+
+        self.device.open()
+        self.device.execute("speed", 1)
 
     def run(self):
         while True:
-            try:
-                item = self.queue.get()
-            except self.queue.Empty:
-                continue
-            else:
-                if (item == 'exit'):
-                    break
-                self.device.execute(item[0], item[1:])
+            action, args, kwargs = self.queue.get()
+            if action == "exit":
                 self.queue.task_done()
-    def __message_processing__(self):
-        while True:
-            new_message = self.queue.get()
-            #print(type(new_message))
-            #print(new_message)
-            #print("Name and args of action are {}".format(new_message))
-            self.device.execute(*new_message)
-            #time.sleep(30)
-            self.queue.task_done()
-            if self.event.is_set():
                 break
-    def __message_thread__(self):
-        thread = Thread(target = self.__message_processing__, daemon=True)
-        thread.start()             
+            self.device.execute(action, *args, **kwargs)
+            self.queue.task_done()
+
+    def add_task(self, action, *args, **kwargs):
+        self.queue.put((action, args, kwargs))
+
 
 class NoBlockingTurtleShell(cmd.Cmd):
-    intro = 'Welcome to the turtle shell.   Type help or ? to list commands.\n'
-    prompt = '(turtle) '
+    intro = "Welcome to the turtle shell.   Type help or ? to list commands.\n"
+    prompt = "(turtle) "
     file = None
 
     def __init__(self, turtle_thread: TurtleDeviceThread):
-        super(NoBlockingTurtleShell, self).__init__()
-        turtle_thread.__message_thread__()
+        super().__init__()
+        self.turtle_thread = turtle_thread
+
+    @property
+    def turtle_device(self):
+        return self.turtle_thread.device
 
     def do_execute(self, arg):
-        turtle_thread.queue.put(parse(arg))
-
-    def do_exit(self, arg):
-         turtle_thread.event.set()
+        command_and_args = arg.split()
+        if len(command_and_args) == 1:
+            self.turtle_thread.add_task(command)
+            return
+        command = command_and_args[0]
+        args = tuple(int(c) if c.isdecimal() else c for c in command_and_args[1:])
+        self.turtle_thread.add_task(command, *args)
 
 
-if __name__ == '__main__':
+    def do_forward(self, arg):
+        'Move the turtle forward by the specified distance:  FORWARD 10'
+        self.do_execute("forward 100")
+    def do_right(self, arg):
+        'Turn turtle right by given number of degrees:  RIGHT 20'
+        self.do_execute("right 100")
+    def do_left(self, arg):
+        'Turn turtle left by given number of degrees:  LEFT 90'
+        self.do_execute("left 100")
+    def do_bye(self, arg):
+        'Stop recording, close the turtle window, and exit:  BYE'
+        print('Thank you for using Turtle')
+        self.turtle_thread.add_task("exit")
+        return True
+
+
+if __name__ == "__main__":
     turtle_thread = TurtleDeviceThread()
-    turtle_thread.start()
-    NoBlockingTurtleShell(turtle_thread).cmdloop()
+    turtle_thread.daemon = True
+    thread_shell = threading.Thread(target=NoBlockingTurtleShell(turtle_thread).cmdloop)
+    thread_shell.start()
+    turtle_thread.run()
+    thread_shell.join()