Initial Commit

triotest1/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

triotest1/.idea/git_toolbox_blame.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GitToolBoxBlameSettings">
+    <option name="version" value="2" />
+  </component>
+</project>

triotest1/.idea/inspectionProfiles/Project_Default.xml

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+<component name="InspectionProjectProfileManager">
+  <profile version="1.0">
+    <option name="myName" value="Project Default" />
+    <inspection_tool class="DuplicatedCode" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <Languages>
+        <language minSize="68" name="Python" />
+      </Languages>
+    </inspection_tool>
+    <inspection_tool class="GrazieInspection" enabled="false" level="TYPO" enabled_by_default="false" />
+    <inspection_tool class="PyBroadExceptionInspection" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
+    <inspection_tool class="PyCompatibilityInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ourVersions">
+        <value>
+          <list size="1">
+            <item index="0" class="java.lang.String" itemvalue="3.13" />
+          </list>
+        </value>
+      </option>
+    </inspection_tool>
+    <inspection_tool class="PyPackageRequirementsInspection" enabled="false" level="WARNING" enabled_by_default="false">
+      <option name="ignoredPackages">
+        <value>
+          <list size="30">
+            <item index="0" class="java.lang.String" itemvalue="chardet" />
+            <item index="1" class="java.lang.String" itemvalue="pymysql" />
+            <item index="2" class="java.lang.String" itemvalue="certifi" />
+            <item index="3" class="java.lang.String" itemvalue="rpi.gpio" />
+            <item index="4" class="java.lang.String" itemvalue="pyserial" />
+            <item index="5" class="java.lang.String" itemvalue="pika" />
+            <item index="6" class="java.lang.String" itemvalue="requests" />
+            <item index="7" class="java.lang.String" itemvalue="urllib3" />
+            <item index="8" class="java.lang.String" itemvalue="dynaconf" />
+            <item index="9" class="java.lang.String" itemvalue="idna" />
+            <item index="10" class="java.lang.String" itemvalue="spidev" />
+            <item index="11" class="java.lang.String" itemvalue="charset-normalizer" />
+            <item index="12" class="java.lang.String" itemvalue="django-celery-beat" />
+            <item index="13" class="java.lang.String" itemvalue="django-celery-results" />
+            <item index="14" class="java.lang.String" itemvalue="python-dateutil" />
+            <item index="15" class="java.lang.String" itemvalue="psycopg2-binary" />
+            <item index="16" class="java.lang.String" itemvalue="reportlab" />
+            <item index="17" class="java.lang.String" itemvalue="drf-spectacular" />
+            <item index="18" class="java.lang.String" itemvalue="celery" />
+            <item index="19" class="java.lang.String" itemvalue="py_expression_eval" />
+            <item index="20" class="java.lang.String" itemvalue="drf-nested-routers" />
+            <item index="21" class="java.lang.String" itemvalue="stripe" />
+            <item index="22" class="java.lang.String" itemvalue="pycountry" />
+            <item index="23" class="java.lang.String" itemvalue="vat_moss" />
+            <item index="24" class="java.lang.String" itemvalue="zope-interface" />
+            <item index="25" class="java.lang.String" itemvalue="gunicorn" />
+            <item index="26" class="java.lang.String" itemvalue="rpi-gpio" />
+            <item index="27" class="java.lang.String" itemvalue="django-debug-toolbar" />
+            <item index="28" class="java.lang.String" itemvalue="pytz" />
+            <item index="29" class="java.lang.String" itemvalue="ipython" />
+          </list>
+        </value>
+      </option>
+    </inspection_tool>
+    <inspection_tool class="PyPep8Inspection" enabled="true" level="WEAK WARNING" enabled_by_default="true">
+      <option name="ignoredErrors">
+        <list>
+          <option value="E402" />
+        </list>
+      </option>
+    </inspection_tool>
+    <inspection_tool class="PyUnresolvedReferencesInspection" enabled="true" level="WARNING" enabled_by_default="true">
+      <option name="ignoredIdentifiers">
+        <list>
+          <option value="pienosole_login.pienosole_api.libs_v2.mixins.PutAsCreateMixin.*" />
+          <option value="pienosole_login.pienosole_api.models.Park.chargingstation_set" />
+          <option value="models.Park.*" />
+          <option value="pycuda.driver.*" />
+        </list>
+      </option>
+    </inspection_tool>
+    <inspection_tool class="SpellCheckingInspection" enabled="false" level="TYPO" enabled_by_default="false">
+      <option name="processCode" value="true" />
+      <option name="processLiterals" value="true" />
+      <option name="processComments" value="true" />
+    </inspection_tool>
+    <inspection_tool class="SqlDialectInspection" enabled="false" level="WARNING" enabled_by_default="false" />
+    <inspection_tool class="SqlNoDataSourceInspection" enabled="false" level="WARNING" enabled_by_default="false" />
+    <inspection_tool class="requirements.InstalledPackageInspection" enabled="false" level="WARNING" enabled_by_default="false" />
+  </profile>
+</component>

triotest1/.idea/inspectionProfiles/profiles_settings.xml

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+<component name="InspectionProjectProfileManager">
+  <settings>
+    <option name="USE_PROJECT_PROFILE" value="false" />
+    <version value="1.0" />
+  </settings>
+</component>

triotest1/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Black">
+    <option name="sdkName" value="Python 3.12 (triotest1)" />
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.12 (triotest1)" project-jdk-type="Python SDK" />
+</project>

triotest1/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/triotest1.iml" filepath="$PROJECT_DIR$/.idea/triotest1.iml" />
+    </modules>
+  </component>
+</project>

triotest1/.idea/triotest1.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module type="PYTHON_MODULE" version="4">
+  <component name="NewModuleRootManager">
+    <content url="file://$MODULE_DIR$">
+      <excludeFolder url="file://$MODULE_DIR$/venv" />
+    </content>
+    <orderEntry type="jdk" jdkName="Python 3.12 (triotest1)" jdkType="Python SDK" />
+    <orderEntry type="sourceFolder" forTests="false" />
+  </component>
+</module>

triotest1/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings" defaultProject="true" />
+</project>

triotest1/echo_client.py

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+import sys
+import trio
+
+PORT = 8081
+
+
+async def sender(client_stream):
+    print("sender: started!")
+    while True:
+        data = b"async can sometimes be confusing, but I believe in you!"
+        print(f"sender: sending {data!r}")
+        await client_stream.send_all(data)
+        await trio.sleep(1)
+
+
+async def receiver(client_stream):
+    print("receiver: started!")
+    async for data in client_stream:
+        print(f"receiver got data {data!r}")
+    print("received: connection closed")
+    sys.exit()
+
+
+async def parent():
+    print(f"parent: connecting to 127.0.0.1:{PORT}")
+    client_stream = await trio.open_tcp_stream("127.0.0.1", PORT)
+    async with client_stream:
+        async with trio.open_nursery() as nursery:
+            print("parent: spawning sender...")
+            nursery.start_soon(sender, client_stream)
+
+            print("parent: spawning receiver...")
+            # noinspection PyTypeChecker
+            nursery.start_soon(receiver, client_stream)
+
+if __name__ == '__main__':
+    trio.run(parent)

triotest1/echo_server.py

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+# echo-server.py
+
+import trio
+from itertools import count
+# Port is arbitrary, but:
+# - must be in between 1024 and 65535
+# - can't be in use by some other program on your computer
+# - must match what we set in our echo client
+PORT = 8081
+
+CONNECTION_COUNTER = count()
+
+
+async def echo_server(server_stream):
+    # Assign each connection a unique number to make our debug prints easier
+    # to understand when there are multiple simultaneous connections.
+    ident = next(CONNECTION_COUNTER)
+    print(f"echo_server {ident}: started")
+    try:
+        async for data in server_stream:
+            print(f"echo_server {ident}: received data {data!r}")
+            await server_stream.send_all(data)
+        print(f"echo_server {ident}: connection closed")
+    # FIXME: add discussion of (Base)ExceptionGroup to the tutorial, and use
+    # exceptiongroup.catch() here. (Not important in this case, but important
+    # if the server code uses nurseries internally.)
+    except Exception as exc:
+        # Unhandled exceptions will propagate into our parent and take
+        # down the whole program. If the exception is KeyboardInterrupt,
+        # that's what we want, but otherwise maybe not...
+        print(f"echo_server {ident}: crashed: {exc!r}")
+
+
+async def main():
+    await trio.serve_tcp(echo_server, PORT)
+
+
+# We could also just write 'trio.run(trio.serve_tcp, echo_server, PORT)', but real
+# programs almost always end up doing other stuff too and then we'd have to go
+# back and factor it out into a separate function anyway. So it's simplest to
+# just make it a standalone function from the beginning.
+trio.run(main)

triotest1/main_server.py

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+from dataclasses import dataclass
+
+import trio
+from itertools import count
+from functools import partial
+
+CONNECTION_COUNTER = count()
+TASK_COUNTER = count()
+
+
+@dataclass
+class Operation:
+    id: int
+    sleep_s: int
+
+
+class Database:
+    ops: list[Operation]
+    id_counter: int = 1
+
+    def __init__(self):
+        self.ops = []
+
+
+@dataclass
+class DatabaseHandler:
+    db: Database
+    lock: trio.Lock = trio.Lock()
+
+
+async def connection_handler(dbh: DatabaseHandler, stream):
+    ident = next(CONNECTION_COUNTER)
+    async for data in stream:
+        print(f"{ident}: received data {data!r}")
+        await stream.send_all(data)
+
+
+async def op_execution(op: Operation):
+    task_id = next(TASK_COUNTER)
+    print(f"Joe {op.id} {task_id} - Started sleeping for {op.sleep_s}sec...")
+    await trio.sleep(op.sleep_s)
+    print(f"Joe {op.id} {task_id} - Slept well!")
+
+
+async def op_spawner(dbh: DatabaseHandler, nursery: trio.Nursery):
+    while True:
+        async with dbh.lock:
+            for op in dbh.db.ops:
+                nursery.start_soon(op_execution, op)
+        await trio.sleep(10)
+
+
+async def main():
+    db = Database()
+    for _ in range(5):
+        i = db.id_counter
+        db.id_counter += 1
+        db.ops.append(Operation(i, i + 1))
+    dbh = DatabaseHandler(db)
+    async with trio.open_nursery() as nursery:
+        nursery.start_soon(op_spawner, dbh, nursery)
+        await trio.serve_tcp(partial(connection_handler, dbh), 3000, host='0.0.0.0')
+
+
+if __name__ == '__main__':
+    trio.run(main)