Fix all linter errors (make lint now exits 0)

- Remove leftover  and unused  import
  from qnodeos.py (debugging leftovers)
- Remove unnecessary  declarations in run.py, start_qnodeos.py,
  and start_vnode.py — the variable is only read in those scopes, not
  assigned, so  is not needed and flake8 F824 flagged it
- Add  to the existing noqa comment in protocol.py for
  the long debug print line
- Fix double space after  in extendGHZ/bobTest.py (E271)
- Add  to aligned state constant blocks in eventBased
  examples and test — alignment is intentional for readability of the
  dispatch tables
- Add  to aligned dispatch table entries and assert tuples
  for the same reason
- Remove unused  from test_polite_ping_pong.py

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Stephanie Wehner

examples/eventBased/politePingPong/politeAlice.py

@@ -51,9 +51,9 @@
 
 # ── States ───────────────────────────────────────────────────────────────────
 
-STATE_WAITING_PONG          = "WAITING_PONG"
+STATE_WAITING_PONG          = "WAITING_PONG"           # noqa: E221
 STATE_WAITING_YOURE_WELCOME = "WAITING_YOURE_WELCOME"
-STATE_DONE                  = "DONE"
+STATE_DONE                  = "DONE"                    # noqa: E221
 
 
 # ── Handlers ─────────────────────────────────────────────────────────────────
@@ -88,7 +88,7 @@ async def handle_youre_welcome(writer: StreamWriter) -> str:
 # and anything not listed is automatically an invalid transition.
 
 ALICE_DISPATCH = {
-    (STATE_WAITING_PONG,          "pong"):           handle_pong,
+    (STATE_WAITING_PONG,          "pong"):           handle_pong,  # noqa: E241
     (STATE_WAITING_YOURE_WELCOME, "you're welcome"): handle_youre_welcome,
 }
 

examples/eventBased/politePingPong/politeBob.py

@@ -41,9 +41,9 @@
 # Each constant names a state in Bob's state machine.
 # The string value is used in log output so keep it human-readable.
 
-STATE_WAITING_PING   = "WAITING_PING"
+STATE_WAITING_PING   = "WAITING_PING"   # noqa: E221
 STATE_WAITING_THANKS = "WAITING_THANKS"
-STATE_DONE           = "DONE"
+STATE_DONE           = "DONE"           # noqa: E221
 
 
 # ── Handlers ─────────────────────────────────────────────────────────────────
@@ -83,7 +83,7 @@ async def handle_thank_you(writer: StreamWriter) -> str:
 # and anything not listed is automatically an invalid transition.
 
 BOB_DISPATCH = {
-    (STATE_WAITING_PING,   "ping"):      handle_ping,
+    (STATE_WAITING_PING,   "ping"):      handle_ping,  # noqa: E241
     (STATE_WAITING_THANKS, "thank you"): handle_thank_you,
 }
 

examples/eventBased/quantumCorrRNG/aliceTest.py

@@ -44,7 +44,7 @@
 # ── States ───────────────────────────────────────────────────────────────────
 
 STATE_WAITING_ACCEPT = "WAITING_ACCEPT"
-STATE_DONE           = "DONE"
+STATE_DONE           = "DONE"           # noqa: E221
 
 
 # ── Handlers ─────────────────────────────────────────────────────────────────

examples/eventBased/quantumCorrRNG/bobTest.py

@@ -38,7 +38,7 @@
 # ── States ───────────────────────────────────────────────────────────────────
 
 STATE_WAITING_PROPOSAL = "WAITING_PROPOSAL"
-STATE_DONE             = "DONE"
+STATE_DONE             = "DONE"             # noqa: E221
 
 
 # ── Handlers ─────────────────────────────────────────────────────────────────

examples/eventBased/quantumCorrRNGVerified/aliceTest.py

@@ -52,9 +52,9 @@
 
 # ── States ───────────────────────────────────────────────────────────────────
 
-STATE_WAITING_ACCEPT       = "WAITING_ACCEPT"
+STATE_WAITING_ACCEPT       = "WAITING_ACCEPT"        # noqa: E221
 STATE_WAITING_VERIFICATION = "WAITING_VERIFICATION"
-STATE_DONE                 = "DONE"
+STATE_DONE                 = "DONE"                  # noqa: E221
 
 
 # ── Handlers ─────────────────────────────────────────────────────────────────

examples/eventBased/quantumCorrRNGVerified/bobTest.py

@@ -46,9 +46,9 @@
 
 # ── States ───────────────────────────────────────────────────────────────────
 
-STATE_WAITING_PROPOSAL     = "WAITING_PROPOSAL"
+STATE_WAITING_PROPOSAL     = "WAITING_PROPOSAL"      # noqa: E221
 STATE_WAITING_ALICE_RESULT = "WAITING_ALICE_RESULT"
-STATE_DONE                 = "DONE"
+STATE_DONE                 = "DONE"                  # noqa: E221
 
 # Bob stores his measurement result here so the verification handler can
 # compare it with Alice's result.

examples/new-sdk/extendGHZ/bobTest.py

@@ -23,7 +23,7 @@
 
 async def send_to_charlie(reader: StreamReader, writer: StreamWriter):
     writer.write("receive_qubit".encode("utf-8"))
-    message = await  reader.read(100)
+    message = await reader.read(100)
     assert message.decode("utf-8") == "continue"
 
 

simulaqron/netqasm_backend/qnodeos.py

@@ -1,5 +1,4 @@
 import logging
-import sys
 
 from typing import Optional, Dict, Callable, Generator, Any, List, Type
 
@@ -13,7 +12,6 @@
 from simulaqron.netqasm_backend.executioner import VanillaSimulaQronExecutioner
 from simulaqron.sdk.connection import (NewMessageType, GetQubitStateMessage,
                                        ReturnQubitStateMessage)
-from simulaqron.settings import simulaqron_settings
 
 
 class SubroutineHandler(QNodeController):

simulaqron/run/run.py

@@ -80,7 +80,6 @@ def _worker_initializer(synced_array: SynchronizedArray):
 
 
 def _app_wrapper(**kwargs):
-    global _apps_pids
     assert _apps_pids is not None
     assert "__instance_num" in kwargs and isinstance(kwargs["__instance_num"], int)
     assert "__entry_function" in kwargs and isinstance(kwargs["__entry_function"], Callable)
@@ -102,7 +101,6 @@ def _app_wrapper(**kwargs):
 
 
 def _signal_other_apps():
-    global _apps_pids
     assert _apps_pids is not None
     for pid in _apps_pids:
         # Do not send SIGINT to self process

simulaqron/sdk/protocol.py

@@ -127,7 +127,7 @@ async def _build_server(self):
             self._sockets_data.port
         )
         print(f"{self._node_name.lower()} INFO: === {self._node_name} Server ===")
-        print(f"{self._node_name.lower()} DEBUG: Listening on {self._sockets_data.hostname}:{self._sockets_data.port}")  # noqa: E231
+        print(f"{self._node_name.lower()} DEBUG: Listening on {self._sockets_data.hostname}:{self._sockets_data.port}")  # noqa: E231,E501
         async with server:
             await server.serve_forever()