GeezerVisonThe World Wide Web, restored to 800 pixels of glory. |
| Home|About|Gaming cabinet|Archives|How it works|Starter sites |
GeezerVison is showing github.com — python-docs-ja/library/asyncio-dev.po at 3.14 · python/python-docs-ja Expand file tree/ Copy pathasyncio-dev.poMore file actions 921 lines (837 loc) · 32.7 KB / Copy pathasyncio-dev.poFile metadata and controls921 lines (837 loc) · 32.7 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 # SOME DESCRIPTIVE TITLE. # Copyright (C) 2001 Python Software Foundation # This file is distributed under the same license as the Python package. # FIRST AUTHOR <EMAIL@ADDRESS>, YEAR. # # Translators: # python-doc bot, 2026 # #, fuzzy msgid "" msgstr "" "Project-Id-Version: Python 3.15\n" "Report-Msgid-Bugs-To: \n" "POT-Creation-Date: 2026-10-01 19:07+0000\n" "PO-Revision-Date: 2025-09-16 00:00+0000\n" "Last-Translator: python-doc bot, 2026\n" "Language-Team: Japanese (https://app.transifex.com/python-doc/teams/5390/" "ja/)\n" "Language: ja\n" "MIME-Version: 1.0\n" "Content-Type: text/plain; charset=UTF-8\n" "Content-Transfer-Encoding: 8bit\n" "Plural-Forms: nplurals=1; plural=0;\n" #: ../../library/asyncio-dev.rst:7 msgid "Developing with asyncio" msgstr "asyncio での開発" msgid "" "Asynchronous programming is different from classic \"sequential\" " "programming." msgstr "" "非同期プログラミングは、従来の「逐次的」なプログラミングとは異なります。" #: ../../library/asyncio-dev.rst:12 msgid "" "This page lists common mistakes and traps and explains how to avoid them." msgstr "" "このページはよくある間違いや落とし穴を列挙し、それらを回避する方法を説明しま" "す。" #: ../../library/asyncio-dev.rst:19 msgid "Debug Mode" msgstr "デバッグモード" #: ../../library/asyncio-dev.rst:21 msgid "" "By default asyncio runs in production mode. In order to ease the " "development asyncio has a *debug mode*." msgstr "" "asyncio はデフォルトで本運用モードで実行されます。いっぽう、開発を容易にする" "ために asyncio は \"デバッグモード\" を持っています。" #: ../../library/asyncio-dev.rst:24 msgid "There are several ways to enable asyncio debug mode:" msgstr "asyncio のデバッグモードを有効化する方法はいくつかあります:" #: ../../library/asyncio-dev.rst:26 msgid "Setting the :envvar:`PYTHONASYNCIODEBUG` environment variable to ``1``." msgstr ":envvar:`PYTHONASYNCIODEBUG` 環境変数の値を ``1`` に設定する。" #: ../../library/asyncio-dev.rst:28 msgid "Using the :ref:`Python Development Mode <devmode>`." msgstr ":ref:`Python 開発モード <devmode>` を使う。" #: ../../library/asyncio-dev.rst:30 msgid "Passing ``debug=True`` to :func:`asyncio.run`." msgstr ":func:`asyncio.run` 実行時に ``debug=True`` を設定する。" #: ../../library/asyncio-dev.rst:32 msgid "Calling :meth:`loop.set_debug`." msgstr ":meth:`loop.set_debug` を呼び出す。" #: ../../library/asyncio-dev.rst:34 msgid "In addition to enabling the debug mode, consider also:" msgstr "デバッグモードを有効化することに加え、以下も検討してください:" #: ../../library/asyncio-dev.rst:36 msgid "" "setting the log level of the :ref:`asyncio logger <asyncio-logger>` " "to :py:const:`logging.DEBUG`, for example the following snippet of code can " "be run at startup of the application::" msgstr "" ":ref:`asyncio ロガー <asyncio-logger>` のログレベル" "を :py:const:`logging.DEBUG` に設定します。例えばアプリケーションの起動時に以" "下を実行します::" msgid "logging.basicConfig(level=logging.DEBUG)" msgstr "logging.basicConfig(level=logging.DEBUG)" #: ../../library/asyncio-dev.rst:42 msgid "" "configuring the :mod:`warnings` module to display :exc:`ResourceWarning` " "warnings. One way of doing that is by using the :option:`-W` ``default`` " "command line option." msgstr "" ":mod:`warnings` モジュールが :exc:`ResourceWarning` 警告を表示するように設定" "します。やり方のひとつは :option:`-W` ``default`` コマンドラインオプションを" "使うことです。" #: ../../library/asyncio-dev.rst:47 msgid "When the debug mode is enabled:" msgstr "デバッグモードが有効化されたときの動作:" #: ../../library/asyncio-dev.rst:49 msgid "" "Many non-threadsafe asyncio APIs (such as :meth:`loop.call_soon` " "and :meth:`loop.call_at` methods) raise an exception if they are called from " "a wrong thread." msgstr "" "スレッドセーフでない asyncio APIs の多く (:meth:`loop.call_soon` " "や :meth:`loop.call_at` など) は、誤ったスレッドから呼び出されたときに例外を" "送出します。" #: ../../library/asyncio-dev.rst:53 msgid "" "The execution time of the I/O selector is logged if it takes too long to " "perform an I/O operation." msgstr "" "I/O セレクタが I/O 処理を実行する時間が長すぎる場合、その実行時間が記録されま" "す。" msgid "" "Callbacks taking longer than 100 milliseconds are logged. " "The :attr:`loop.slow_callback_duration` attribute can be used to set the " "minimum execution duration in seconds that is considered \"slow\"." msgstr "" "実行時間が 100 ミリ秒を超えるコールバックはログに記録されます。\n" ":attr:`loop.slow_callback_duration` 属性で、「遅い」とみなす実行時間の最小値" "を秒単位で設定できます。" #: ../../library/asyncio-dev.rst:64 msgid "Concurrency and Multithreading" msgstr "並行処理とマルチスレッド処理" #: ../../library/asyncio-dev.rst:66 msgid "" "An event loop runs in a thread (typically the main thread) and executes all " "callbacks and Tasks in its thread. While a Task is running in the event " "loop, no other Tasks can run in the same thread. When a Task executes an " "``await`` expression, the running Task gets suspended, and the event loop " "executes the next Task." msgstr "" "イベントループはスレッド（典型的にはメインスレッド）内で動作し、すべてのコー" "ルバックとタスクをそのスレッド内で実行します。ひとつのタスクがイベントループ" "内で実行される間、他のタスクを同じスレッド内で実行することはできません。タス" "クが ``await`` 式を実行すると、実行中のタスクはサスペンドされ、イベントループ" "は次のタスクを実行します。" #: ../../library/asyncio-dev.rst:72 msgid "" "To schedule a :term:`callback` from another OS thread, " "the :meth:`loop.call_soon_threadsafe` method should be used. Example::" msgstr "" "別の OS スレッドからのコールバック (:term:`callback`) をスケジュールする場" "合、 :meth:`loop.call_soon_threadsafe` メソッドを使ってください。例:" msgid "loop.call_soon_threadsafe(callback, *args)" msgstr "loop.call_soon_threadsafe(callback, *args)" msgid "" "Almost all asyncio objects are not thread safe, which is typically not a " "problem unless there is code that works with them from outside of a Task or " "a callback. If there's a need for such code to call a low-level asyncio " "API, the :meth:`loop.call_soon_threadsafe` method should be used, e.g.::" msgstr "" "ほぼ全ての非同期オブジェクトはスレッドセーフではありませんが、タスクやコール" "バックの外側で非同期オブジェクトを使うコードが存在しない限り、それが問題には" "なることはほとんどありません。もしそのような目的で低レベルの asyncio API を呼" "び出すようなコードを書く必要がある場合、 :meth:`loop.call_soon_threadsafe` メ" "ソッドを使ってください。例:" msgid "loop.call_soon_threadsafe(fut.cancel)" msgstr "loop.call_soon_threadsafe(fut.cancel)" #: ../../library/asyncio-dev.rst:85 msgid "" "To schedule a coroutine object from a different OS thread, " "the :func:`run_coroutine_threadsafe` function should be used. It returns " "a :class:`concurrent.futures.Future` to access the result::" msgstr "" "別の OS スレッドからコルーチンオブジェクトをスケジュールする場合" "は、 :func:`run_coroutine_threadsafe` メソッドを使ってください。 " "``run_coroutine_threadsafe()`` は結果にアクセスするため" "の :class:`concurrent.futures.Future` オブジェクトを返します:" msgid "" "async def coro_func():\n" " return await asyncio.sleep(1, 42)\n" "\n" "# Later in another OS thread:\n" "\n" "future = asyncio.run_coroutine_threadsafe(coro_func(), loop)\n" "# Wait for the result:\n" "result = future.result()" msgstr "" "async def coro_func():\n" " return await asyncio.sleep(1, 42)\n" "\n" "# 後で、別の OS スレッド内で実行する:\n" "\n" "future = asyncio.run_coroutine_threadsafe(coro_func(), loop)\n" "# 結果を待つ:\n" "result = future.result()" #: ../../library/asyncio-dev.rst:98 msgid "To handle signals the event loop must be run in the main thread." msgstr "" "シグナルの処理を行うには、イベントループはメインスレッド内で実行しなければな" "りません。" msgid "" "The :meth:`loop.run_in_executor` method can be used with " "a :class:`concurrent.futures.ThreadPoolExecutor` " "or :class:`~concurrent.futures.InterpreterPoolExecutor` to execute blocking " "code in a different OS thread without blocking the OS thread that the event " "loop runs in." msgstr "" ":meth:`loop.run_in_executor` メソッド" "を :class:`concurrent.futures.ThreadPoolExecutor` また" "は :class:`~concurrent.futures.InterpreterPoolExecutor` と組み合わせると、イ" "ベントループの OS スレッドをブロックせずに、別の OS スレッドでブロッキング" "コードを実行できます。" #: ../../library/asyncio-dev.rst:107 msgid "" "There is currently no way to schedule coroutines or callbacks directly from " "a different process (such as one started with :mod:`multiprocessing`). " "The :ref:`asyncio-event-loop-methods` section lists APIs that can read from " "pipes and watch file descriptors without blocking the event loop. In " "addition, asyncio's :ref:`Subprocess <asyncio-subprocess>` APIs provide a " "way to start a process and communicate with it from the event loop. Lastly, " "the aforementioned :meth:`loop.run_in_executor` method can also be used with " "a :class:`concurrent.futures.ProcessPoolExecutor` to execute code in a " "different process." msgstr "" "現在のところ、 (たとえば :mod:`multiprocessing` で開始したような) 別のプロセ" "スからコルーチンやコールバックを直接スケジュールすることはできませ" "ん。 :ref:`asyncio-event-loop-methods` 節では、イベントループをブロックするこ" "となくパイプからの読み込みやファイルデスクリプタの監視ができる API のリストを" "掲載しています。さらに、 asyncio の :ref:`サブプロセス <asyncio-subprocess>` " "API はイベントループからプロセスを開始したりプロセスと通信したりする方法を提" "供します。 最後に、前述の :meth:`loop.run_in_executor` メソッド" "は :class:`concurrent.futures.ProcessPoolExecutor` とともに使用することで、別" "のプロセス内でコードを実行することもできます。" #: ../../library/asyncio-dev.rst:121 msgid "Running Blocking Code" msgstr "ブロッキングコードの実行" msgid "" "Blocking (CPU-bound) code should not be called directly. For example, if a " "function performs a CPU-intensive calculation for 1 second, all concurrent " "asyncio Tasks and IO operations would be delayed by 1 second." msgstr "" "ブロッキングコード (CPU バウンドなコード) を直接呼び出すべきではありません。" "たとえば、 CPU 負荷の高い関数を1秒実行したとすると、並行に処理されている全て" "の非同期タスクと I/O 処理は1秒遅れる可能性があります。" msgid "" "An executor can be used to run a task in a different thread, including in a " "different interpreter, or even in a different process to avoid blocking the " "OS thread with the event loop. See the :meth:`loop.run_in_executor` method " "for more details." msgstr "" "Executor を使うと、別のスレッド (別のインタープリタを含む) や別のプロセスで処" "理を実行し、イベントループの OS スレッドがブロックされるのを避けられます。\n" "詳細は :meth:`loop.run_in_executor` メソッドを参照してください。" #: ../../library/asyncio-dev.rst:138 msgid "Logging" msgstr "ログ記録" #: ../../library/asyncio-dev.rst:140 msgid "" "asyncio uses the :mod:`logging` module and all logging is performed via the " "``\"asyncio\"`` logger." msgstr "" "asyncio は :mod:`logging` モジュールを利用し、 全てのログ記録は " "``\"asyncio\"`` ロガーを通じて行われます。" #: ../../library/asyncio-dev.rst:143 msgid "" "The default log level is :py:const:`logging.INFO`, which can be easily " "adjusted::" msgstr "" "デフォルトのログレベルは :py:const:`logging.INFO` ですが、これは簡単に調節で" "きます:" msgid "logging.getLogger(\"asyncio\").setLevel(logging.WARNING)" msgstr "logging.getLogger(\"asyncio\").setLevel(logging.WARNING)" #: ../../library/asyncio-dev.rst:149 msgid "" "Network logging can block the event loop. It is recommended to use a " "separate thread for handling logs or use non-blocking IO. For example, " "see :ref:`blocking-handlers`." msgstr "" "ネットワークログ記録は、イベントループをブロックし得ます。ログ処理のスレッド" "を分離するか、ノンブロッキング IO を使用することを推奨します。例え" "ば、 :ref:`blocking-handlers` を見てください。" #: ../../library/asyncio-dev.rst:157 msgid "Detect never-awaited coroutines" msgstr "待ち受け処理を伴わないコルーチンの検出" msgid "" "When a coroutine function is called, but not awaited (e.g. ``coro()`` " "instead of ``await coro()``) or the coroutine is not scheduled " "with :meth:`asyncio.create_task`, asyncio will emit a :exc:`RuntimeWarning`::" msgstr "" "コルーチン関数を呼び出しただけで、await も :meth:`asyncio.create_task` による" "スケジュールも行わなかった場合 (例えば ``await coro()`` の代わりに " "``coro()`` と書いた場合)、asyncio は :exc:`RuntimeWarning` を出します。 ::" msgid "" "import asyncio\n" "\n" "async def test():\n" " print(\"never scheduled\")\n" "\n" "async def main():\n" " test()\n" "\n" "asyncio.run(main())" msgstr "" "import asyncio\n" "\n" "async def test():\n" " print(\"never scheduled\")\n" "\n" "async def main():\n" " test()\n" "\n" "asyncio.run(main())" #: ../../library/asyncio-dev.rst:174 ../../library/asyncio-dev.rst:219 #: ../../library/asyncio-dev.rst:393 ../../library/asyncio-dev.rst:450 msgid "Output::" msgstr "出力::" msgid "" "test.py:7: RuntimeWarning: coroutine 'test' was never awaited\n" " test()" msgstr "" "test.py:7: RuntimeWarning: coroutine 'test' was never awaited\n" " test()" #: ../../library/asyncio-dev.rst:179 ../../library/asyncio-dev.rst:235 msgid "Output in debug mode::" msgstr "デバッグモードの出力::" msgid "" "test.py:7: RuntimeWarning: coroutine 'test' was never awaited\n" "Coroutine created at (most recent call last)\n" " File \"../t.py\", line 9, in <module>\n" " asyncio.run(main(), debug=True)\n" "\n" " < .. >\n" "\n" " File \"../t.py\", line 7, in main\n" " test()\n" " test()" msgstr "" "test.py:7: RuntimeWarning: coroutine 'test' was never awaited\n" "Coroutine created at (most recent call last)\n" " File \"../t.py\", line 9, in <module>\n" " asyncio.run(main(), debug=True)\n" "\n" " < .. >\n" "\n" " File \"../t.py\", line 7, in main\n" " test()\n" " test()" #: ../../library/asyncio-dev.rst:192 msgid "" "The usual fix is to either await the coroutine or call " "the :meth:`asyncio.create_task` function::" msgstr "" "通常の修正方法はコルーチンを待ち受ける (await) " "か、 :meth:`asyncio.create_task` 関数を呼び出すことです:" msgid "" "async def main():\n" " await test()" msgstr "" "async def main():\n" " await test()" #: ../../library/asyncio-dev.rst:200 msgid "Detect never-retrieved exceptions" msgstr "回収されない例外の検出" #: ../../library/asyncio-dev.rst:202 msgid "" "If a :meth:`Future.set_exception` is called but the Future object is never " "awaited on, the exception would never be propagated to the user code. In " "this case, asyncio would emit a log message when the Future object is " "garbage collected." msgstr "" "もし :meth:`Future.set_exception` メソッドが呼び出されても、その Future オブ" "ジェクトを待ち受けていなければ、例外は決してユーザーコードまで伝播しません。" "この場合 asyncio は、 Future オブジェクトがガベージコレクションの対象となった" "ときにログメッセージを送出することがあります。" #: ../../library/asyncio-dev.rst:207 msgid "Example of an unhandled exception::" msgstr "処理されない例外の例:" msgid "" "import asyncio\n" "\n" "async def bug():\n" " raise Exception(\"not consumed\")\n" "\n" "async def main():\n" " asyncio.create_task(bug())\n" "\n" "asyncio.run(main())" msgstr "" "import asyncio\n" "\n" "async def bug():\n" " raise Exception(\"not consumed\")\n" "\n" "async def main():\n" " asyncio.create_task(bug())\n" "\n" "asyncio.run(main())" msgid "" "Task exception was never retrieved\n" "future: <Task finished coro=<bug() done, defined at test.py:3>\n" " exception=Exception('not consumed')>\n" "\n" "Traceback (most recent call last):\n" " File \"test.py\", line 4, in bug\n" " raise Exception(\"not consumed\")\n" "Exception: not consumed" msgstr "" "Task exception was never retrieved\n" "future: <Task finished coro=<bug() done, defined at test.py:3>\n" " exception=Exception('not consumed')>\n" "\n" "Traceback (most recent call last):\n" " File \"test.py\", line 4, in bug\n" " raise Exception(\"not consumed\")\n" "Exception: not consumed" #: ../../library/asyncio-dev.rst:230 msgid "" ":ref:`Enable the debug mode <asyncio-debug-mode>` to get the traceback where " "the task was created::" msgstr "" "タスクが生成された箇所を特定するには、 :ref:`デバッグモードを有効化して " "<asyncio-debug-mode>` トレースバックを取得してください:" msgid "asyncio.run(main(), debug=True)" msgstr "asyncio.run(main(), debug=True)" msgid "" "Task exception was never retrieved\n" "future: <Task finished coro=<bug() done, defined at test.py:3>\n" " exception=Exception('not consumed') created at asyncio/tasks.py:321>\n" "\n" "source_traceback: Object created at (most recent call last):\n" " File \"../t.py\", line 9, in <module>\n" " asyncio.run(main(), debug=True)\n" "\n" "< .. >\n" "\n" "Traceback (most recent call last):\n" " File \"../t.py\", line 4, in bug\n" " raise Exception(\"not consumed\")\n" "Exception: not consumed" msgstr "" "Task exception was never retrieved\n" "future: <Task finished coro=<bug() done, defined at test.py:3>\n" " exception=Exception('not consumed') created at asyncio/tasks.py:321>\n" "\n" "source_traceback: Object created at (most recent call last):\n" " File \"../t.py\", line 9, in <module>\n" " asyncio.run(main(), debug=True)\n" "\n" "< .. >\n" "\n" "Traceback (most recent call last):\n" " File \"../t.py\", line 4, in bug\n" " raise Exception(\"not consumed\")\n" "Exception: not consumed" msgid "Asynchronous generators best practices" msgstr "非同期ジェネレーターを使う際の推奨事項" msgid "" "Writing correct and efficient asyncio code requires awareness of certain " "pitfalls. This section outlines essential best practices that can save you " "hours of debugging." msgstr "" "正しく効率的な asyncio コードを書くには、いくつかの落とし穴を知っておく必要が" "あります。\n" "この節では、長時間のデバッグを避けるために役立つ重要な実践方法を説明します。" msgid "Close asynchronous generators explicitly" msgstr "非同期ジェネレーターを明示的に閉じる" msgid "" "It is recommended to manually close the :term:`asynchronous generator " "<asynchronous generator iterator>`. If a generator exits early - for " "example, due to an exception raised in the body of an ``async for`` loop - " "its asynchronous cleanup code may run in an unexpected context. This can " "occur after the tasks it depends on have completed, or during the event loop " "shutdown when the async-generator's garbage collection hook is called." msgstr "" ":term:`非同期ジェネレーター <asynchronous generator iterator>` は明示的に閉じ" "ることを推奨します。\n" "例えば ``async for`` ループの本体で例外が起きるなどして、途中でジェネレーター" "の使用を終えると、非同期の後始末処理が予期しないコンテキストで実行される可能" "性があります。\n" "依存するタスクが完了した後や、イベントループの終了中に非同期ジェネレーターの" "ガベージコレクション用フックが呼び出されたときに、後始末が行われることがあり" "ます。" msgid "" "To avoid this, explicitly close the generator by calling " "its :meth:`~agen.aclose` method, or use the :func:`contextlib.aclosing` " "context manager::" msgstr "" "これを避けるには、:meth:`~agen.aclose` メソッドを呼び出して明示的にジェネレー" "ターを閉じるか、:func:`contextlib.aclosing` コンテキストマネージャーを使って" "ください。 ::" msgid "" "import asyncio\n" "import contextlib\n" "\n" "async def gen():\n" " yield 1\n" " yield 2\n" "\n" "async def func():\n" " async with contextlib.aclosing(gen()) as g:\n" " async for x in g:\n" " break # Don't iterate until the end\n" "\n" "asyncio.run(func())" msgstr "" "import asyncio\n" "import contextlib\n" "\n" "async def gen():\n" " yield 1\n" " yield 2\n" "\n" "async def func():\n" " async with contextlib.aclosing(gen()) as g:\n" " async for x in g:\n" " break # 最後までイテレーションしない\n" "\n" "asyncio.run(func())" msgid "" "As noted above, the cleanup code for these asynchronous generators is " "deferred. The following example demonstrates that the finalization of an " "asynchronous generator can occur in an unexpected order::" msgstr "" "前述のとおり、これらの非同期ジェネレーターの後始末処理は後回しにされます。\n" "次の例は、非同期ジェネレーターの終了処理が予期しない順序で行われる場合を示し" "ています。 ::" msgid "" "import asyncio\n" "work_done = False\n" "\n" "async def cursor():\n" " try:\n" " yield 1\n" " finally:\n" " assert work_done\n" "\n" "async def rows():\n" " global work_done\n" " try:\n" " yield 2\n" " finally:\n" " await asyncio.sleep(0.1) # imitate some async work\n" " work_done = True\n" "\n" "\n" "async def main():\n" " async for c in cursor():\n" " async for r in rows():\n" " break\n" " break\n" "\n" "asyncio.run(main())" msgstr "" "import asyncio\n" "work_done = False\n" "\n" "async def cursor():\n" " try:\n" " yield 1\n" " finally:\n" " assert work_done\n" "\n" "async def rows():\n" " global work_done\n" " try:\n" " yield 2\n" " finally:\n" " await asyncio.sleep(0.1) # 非同期の処理を模倣する\n" " work_done = True\n" "\n" "\n" "async def main():\n" " async for c in cursor():\n" " async for r in rows():\n" " break\n" " break\n" "\n" "asyncio.run(main())" msgid "For this example, we get the following output::" msgstr "この例の出力は次のようになります。 ::" msgid "" "unhandled exception during asyncio.run() shutdown\n" "task: <Task finished name='Task-3' coro=<<async_generator_athrow without " "__name__>()> exception=AssertionError()>\n" "Traceback (most recent call last):\n" " File \"example.py\", line 6, in cursor\n" " yield 1\n" "asyncio.exceptions.CancelledError\n" "\n" "During handling of the above exception, another exception occurred:\n" "\n" "Traceback (most recent call last):\n" " File \"example.py\", line 8, in cursor\n" " assert work_done\n" " ^^^^^^^^^\n" "AssertionError" msgstr "" "unhandled exception during asyncio.run() shutdown\n" "task: <Task finished name='Task-3' coro=<<async_generator_athrow without " "__name__>()> exception=AssertionError()>\n" "Traceback (most recent call last):\n" " File \"example.py\", line 6, in cursor\n" " yield 1\n" "asyncio.exceptions.CancelledError\n" "\n" "During handling of the above exception, another exception occurred:\n" "\n" "Traceback (most recent call last):\n" " File \"example.py\", line 8, in cursor\n" " assert work_done\n" " ^^^^^^^^^\n" "AssertionError" msgid "" "The ``cursor()`` asynchronous generator was finalized before the ``rows`` " "generator - an unexpected behavior." msgstr "" "``cursor()`` 非同期ジェネレーターの終了処理が ``rows`` ジェネレーターより先に" "行われています。\n" "これは意図しない動作です。" msgid "" "The example can be fixed by explicitly closing the ``cursor`` and ``rows`` " "async-generators::" msgstr "" "この例は、``cursor`` と ``rows`` の非同期ジェネレーターを明示的に閉じることで" "修正できます。 ::" msgid "" "async def main():\n" " async with contextlib.aclosing(cursor()) as cursor_gen:\n" " async for c in cursor_gen:\n" " async with contextlib.aclosing(rows()) as rows_gen:\n" " async for r in rows_gen:\n" " break\n" " break" msgstr "" "async def main():\n" " async with contextlib.aclosing(cursor()) as cursor_gen:\n" " async for c in cursor_gen:\n" " async with contextlib.aclosing(rows()) as rows_gen:\n" " async for r in rows_gen:\n" " break\n" " break" #: ../../library/asyncio-dev.rst:352 msgid "Create asynchronous generators only when the event loop is running" msgstr "" #: ../../library/asyncio-dev.rst:354 msgid "" "It is recommended to create :term:`asynchronous generators <asynchronous " "generator iterator>` only after the event loop has been created." msgstr "" msgid "" "To ensure that asynchronous generators close reliably, the event loop uses " "the :func:`sys.set_asyncgen_hooks` function to register callback functions. " "These callbacks update the list of running asynchronous generators to keep " "it in a consistent state." msgstr "" "非同期ジェネレーターを確実に閉じるため、イベントループ" "は :func:`sys.set_asyncgen_hooks` 関数でコールバック関数を登録します。\n" "これらのコールバックは、実行中の非同期ジェネレーターの一覧を更新し、整合性を" "保ちます。" msgid "" "When the :meth:`loop.shutdown_asyncgens() <asyncio.loop.shutdown_asyncgens>` " "function is called, the running generators are stopped gracefully and the " "list is cleared." msgstr "" ":meth:`loop.shutdown_asyncgens() <asyncio.loop.shutdown_asyncgens>` 関数が呼" "び出されると、実行中のジェネレーターの終了処理を行い、一覧を空にします。" msgid "" "The asynchronous generator invokes the corresponding system hook during its " "first iteration. At the same time, the generator records that the hook has " "been called and does not call it again." msgstr "" "非同期ジェネレーターは、最初のイテレーションで対応するシステムフックを呼び出" "します。\n" "同時に、フックを呼び出したことを記録し、以後は再び呼び出しません。" #: ../../library/asyncio-dev.rst:371 msgid "" "Therefore, if iteration begins before the event loop is created, the event " "loop will not be able to add the generator to its list of active generators " "because the hooks are set after the generator attempts to call them. " "Consequently, the event loop will not be able to terminate the generator if " "necessary." msgstr "" #: ../../library/asyncio-dev.rst:377 msgid "Consider the following example::" msgstr "次に示す例について考えてみてください。::" msgid "" "import asyncio\n" "\n" "async def agenfn():\n" " try:\n" " yield 10\n" " finally:\n" " await asyncio.sleep(0)\n" "\n" "\n" "with asyncio.Runner() as runner:\n" " agen = agenfn()\n" " print(runner.run(anext(agen)))\n" " del agen" msgstr "" "import asyncio\n" "\n" "async def agenfn():\n" " try:\n" " yield 10\n" " finally:\n" " await asyncio.sleep(0)\n" "\n" "\n" "with asyncio.Runner() as runner:\n" " agen = agenfn()\n" " print(runner.run(anext(agen)))\n" " del agen" msgid "" "10\n" "Exception ignored while closing generator <async_generator object agenfn at " "0x000002F71CD10D70>:\n" "Traceback (most recent call last):\n" " File \"example.py\", line 13, in <module>\n" " del agen\n" " ^^^^\n" "RuntimeError: async generator ignored GeneratorExit" msgstr "" "10\n" "Exception ignored while closing generator <async_generator object agenfn at " "0x000002F71CD10D70>:\n" "Traceback (most recent call last):\n" " File \"example.py\", line 13, in <module>\n" " del agen\n" " ^^^^\n" "RuntimeError: async generator ignored GeneratorExit" msgid "This example can be fixed as follows::" msgstr "この例は次のように修正できます。 ::" msgid "" "import asyncio\n" "\n" "async def agenfn():\n" " try:\n" " yield 10\n" " finally:\n" " await asyncio.sleep(0)\n" "\n" "async def main():\n" " agen = agenfn()\n" " print(await anext(agen))\n" " del agen\n" "\n" "asyncio.run(main())" msgstr "" "import asyncio\n" "\n" "async def agenfn():\n" " try:\n" " yield 10\n" " finally:\n" " await asyncio.sleep(0)\n" "\n" "async def main():\n" " agen = agenfn()\n" " print(await anext(agen))\n" " del agen\n" "\n" "asyncio.run(main())" msgid "Avoid concurrent iteration and closure of the same generator" msgstr "同じジェネレーターのイテレーションとクローズを並行して行わない" #: ../../library/asyncio-dev.rst:424 msgid "" "Async generators may be reentered while " "another :meth:`~agen.__anext__` / :meth:`~agen.athrow` / :meth:`~agen.aclose` " "call is in progress. This may lead to an inconsistent state of the async " "generator and can cause errors." msgstr "" msgid "Let's consider the following example::" msgstr "次の例を考えてみてください。 ::" msgid "" "import asyncio\n" "\n" "async def consumer():\n" " for idx in range(100):\n" " await asyncio.sleep(0)\n" " message = yield idx\n" " print('received', message)\n" "\n" "async def amain():\n" " agenerator = consumer()\n" " await agenerator.asend(None)\n" "\n" " fa = asyncio.create_task(agenerator.asend('A'))\n" " fb = asyncio.create_task(agenerator.asend('B'))\n" " await fa\n" " await fb\n" "\n" "asyncio.run(amain())" msgstr "" "import asyncio\n" "\n" "async def consumer():\n" " for idx in range(100):\n" " await asyncio.sleep(0)\n" " message = yield idx\n" " print('received', message)\n" "\n" "async def amain():\n" " agenerator = consumer()\n" " await agenerator.asend(None)\n" "\n" " fa = asyncio.create_task(agenerator.asend('A'))\n" " fb = asyncio.create_task(agenerator.asend('B'))\n" " await fa\n" " await fb\n" "\n" "asyncio.run(amain())" msgid "" "received A\n" "Traceback (most recent call last):\n" " File \"test.py\", line 38, in <module>\n" " asyncio.run(amain())\n" " ~~~~~~~~~~~^^^^^^^^^\n" " File \"Lib/asyncio/runners.py\", line 204, in run\n" " return runner.run(main)\n" " ~~~~~~~~~~^^^^^^\n" " File \"Lib/asyncio/runners.py\", line 127, in run\n" " return self._loop.run_until_complete(task)\n" " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^\n" " File \"Lib/asyncio/base_events.py\", line 719, in run_until_complete\n" " return future.result()\n" " ~~~~~~~~~~~~~^^\n" " File \"test.py\", line 36, in amain\n" " await fb\n" "RuntimeError: anext(): asynchronous generator is already running" msgstr "" "received A\n" "Traceback (most recent call last):\n" " File \"test.py\", line 38, in <module>\n" " asyncio.run(amain())\n" " ~~~~~~~~~~~^^^^^^^^^\n" " File \"Lib/asyncio/runners.py\", line 204, in run\n" " return runner.run(main)\n" " ~~~~~~~~~~^^^^^^\n" " File \"Lib/asyncio/runners.py\", line 127, in run\n" " return self._loop.run_until_complete(task)\n" " ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^\n" " File \"Lib/asyncio/base_events.py\", line 719, in run_until_complete\n" " return future.result()\n" " ~~~~~~~~~~~~~^^\n" " File \"test.py\", line 36, in amain\n" " await fb\n" "RuntimeError: anext(): asynchronous generator is already running" msgid "" "Therefore, it is recommended to avoid using asynchronous generators in " "parallel tasks or across multiple event loops." msgstr "" "そのため、並行して動くタスクや複数のイベントループで非同期ジェネレーターを共" "有して使うことは避けるよう推奨します。" |
| You are visitor 01402520 — GeezerVison does not store the pages you look up. Best viewed with Netscape Navigator 4.7 or Internet Explorer 6 at 800×600. No cookies required. |