# Copyright (C) 2001 Python Software Foundation

# This file is distributed under the same license as the Python package.

#

# Translators:

msgid ""

msgstr ""

"Project-Id-Version: Python 3.14\n"

"Report-Msgid-Bugs-To: \n"

"POT-Creation-Date: 2026-02-19 00:20+0000\n"

"PO-Revision-Date: 2018-05-23 16:17+0000\n"

"Last-Translator: Adrian Liaw <adrianliaw2000@gmail.com>\n"

"Language-Team: Chinese - TAIWAN (https://github.com/python/python-docs-zh-"

"tw)\n"

"Language: zh_TW\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"

#: ../../reference/compound_stmts.rst:5

msgid "Compound statements"

msgstr "複合陳述式"

#: ../../reference/compound_stmts.rst:9

msgid ""

"Compound statements contain (groups of) other statements; they affect or "

"control the execution of those other statements in some way. In general, "

"compound statements span multiple lines, although in simple incarnations a "

"whole compound statement may be contained in one line."

msgstr ""

#: ../../reference/compound_stmts.rst:14

msgid ""

"The :keyword:`if`, :keyword:`while` and :keyword:`for` statements implement "

"traditional control flow constructs. :keyword:`try` specifies exception "

"handlers and/or cleanup code for a group of statements, while the :keyword:"

"`with` statement allows the execution of initialization and finalization "

"code around a block of code. Function and class definitions are also "

"syntactically compound statements."

msgstr ""

#: ../../reference/compound_stmts.rst:26

msgid ""

"A compound statement consists of one or more 'clauses.' A clause consists "

"of a header and a 'suite.' The clause headers of a particular compound "

"statement are all at the same indentation level. Each clause header begins "

"with a uniquely identifying keyword and ends with a colon. A suite is a "

"group of statements controlled by a clause. A suite can be one or more "

"semicolon-separated simple statements on the same line as the header, "

"following the header's colon, or it can be one or more indented statements "

"on subsequent lines. Only the latter form of a suite can contain nested "

"compound statements; the following is illegal, mostly because it wouldn't be "

"clear to which :keyword:`if` clause a following :keyword:`else` clause would "

"belong::"

msgstr ""

#: ../../reference/compound_stmts.rst:37

msgid "if test1: if test2: print(x)"

msgstr "if test1: if test2: print(x)"

#: ../../reference/compound_stmts.rst:39

msgid ""

"Also note that the semicolon binds tighter than the colon in this context, "

"so that in the following example, either all or none of the :func:`print` "

"calls are executed::"

msgstr ""

#: ../../reference/compound_stmts.rst:43

msgid "if x < y < z: print(x); print(y); print(z)"

msgstr "if x < y < z: print(x); print(y); print(z)"

#: ../../reference/compound_stmts.rst:45

msgid "Summarizing:"

msgstr ""

#: ../../reference/compound_stmts.rst:69

msgid ""

"Note that statements always end in a ``NEWLINE`` possibly followed by a "

"``DEDENT``. Also note that optional continuation clauses always begin with "

"a keyword that cannot start a statement, thus there are no ambiguities (the "

"'dangling :keyword:`else`' problem is solved in Python by requiring nested :"

"keyword:`if` statements to be indented)."

msgstr ""

#: ../../reference/compound_stmts.rst:75

msgid ""

"The formatting of the grammar rules in the following sections places each "

"clause on a separate line for clarity."

msgstr ""

#: ../../reference/compound_stmts.rst:84

msgid "The :keyword:`!if` statement"

msgstr ":keyword:`!if` 陳述式"

#: ../../reference/compound_stmts.rst:92

msgid "The :keyword:`if` statement is used for conditional execution:"

msgstr ""

#: ../../reference/compound_stmts.rst:99

msgid ""

"It selects exactly one of the suites by evaluating the expressions one by "

"one until one is found to be true (see section :ref:`booleans` for the "

"definition of true and false); then that suite is executed (and no other "

"part of the :keyword:`if` statement is executed or evaluated). If all "

"expressions are false, the suite of the :keyword:`else` clause, if present, "

"is executed."

msgstr ""

#: ../../reference/compound_stmts.rst:109

msgid "The :keyword:`!while` statement"

msgstr ":keyword:`!while` 陳述式"

#: ../../reference/compound_stmts.rst:117

msgid ""

"The :keyword:`while` statement is used for repeated execution as long as an "

"expression is true:"

msgstr ""

#: ../../reference/compound_stmts.rst:124

msgid ""

"This repeatedly tests the expression and, if it is true, executes the first "

"suite; if the expression is false (which may be the first time it is tested) "

"the suite of the :keyword:`!else` clause, if present, is executed and the "

"loop terminates."

msgstr ""

#: ../../reference/compound_stmts.rst:133

msgid ""

"A :keyword:`break` statement executed in the first suite terminates the loop "

"without executing the :keyword:`!else` clause's suite. A :keyword:"

"`continue` statement executed in the first suite skips the rest of the suite "

"and goes back to testing the expression."

msgstr ""

#: ../../reference/compound_stmts.rst:142

msgid "The :keyword:`!for` statement"

msgstr ":keyword:`!for` 陳述式"

#: ../../reference/compound_stmts.rst:153

msgid ""

"The :keyword:`for` statement is used to iterate over the elements of a "

"sequence (such as a string, tuple or list) or other iterable object:"

msgstr ""

#: ../../reference/compound_stmts.rst:160

msgid ""

"The :token:`~python-grammar:starred_expression_list` expression is evaluated "

"once; it should yield an :term:`iterable` object. An :term:`iterator` is "

"created for that iterable. The first item provided by the iterator is then "

"assigned to the target list using the standard rules for assignments (see :"

"ref:`assignment`), and the suite is executed. This repeats for each item "

"provided by the iterator. When the iterator is exhausted, the suite in the :"

"keyword:`!else` clause, if present, is executed, and the loop terminates."

msgstr ""

#: ../../reference/compound_stmts.rst:173

msgid ""

"A :keyword:`break` statement executed in the first suite terminates the loop "

"without executing the :keyword:`!else` clause's suite. A :keyword:"

"`continue` statement executed in the first suite skips the rest of the suite "

"and continues with the next item, or with the :keyword:`!else` clause if "

"there is no next item."

msgstr ""

#: ../../reference/compound_stmts.rst:179

msgid ""

"The for-loop makes assignments to the variables in the target list. This "

"overwrites all previous assignments to those variables including those made "

"in the suite of the for-loop::"

msgstr ""

#: ../../reference/compound_stmts.rst:183

msgid ""

"for i in range(10):\n"

" print(i)\n"

" i = 5 # this will not affect the for-loop\n"

" # because i will be overwritten with the next\n"

" # index in the range"

msgstr ""

#: ../../reference/compound_stmts.rst:193

msgid ""

"Names in the target list are not deleted when the loop is finished, but if "

"the sequence is empty, they will not have been assigned to at all by the "

"loop. Hint: the built-in type :func:`range` represents immutable arithmetic "

"sequences of integers. For instance, iterating ``range(3)`` successively "

"yields 0, 1, and then 2."

msgstr ""

#: ../../reference/compound_stmts.rst:198

msgid "Starred elements are now allowed in the expression list."

msgstr ""

#: ../../reference/compound_stmts.rst:205

msgid "The :keyword:`!try` statement"

msgstr ":keyword:`!try` 陳述式"

#: ../../reference/compound_stmts.rst:215

msgid ""

"The :keyword:`!try` statement specifies exception handlers and/or cleanup "

"code for a group of statements:"

msgstr ""

#: ../../reference/compound_stmts.rst:231

msgid ""

"Additional information on exceptions can be found in section :ref:"

"`exceptions`, and information on using the :keyword:`raise` statement to "

"generate exceptions may be found in section :ref:`raise`."

msgstr ""

#: ../../reference/compound_stmts.rst:235

msgid ""

"Support for optionally dropping grouping parentheses when using multiple "

"exception types. See :pep:`758`."

msgstr ""

#: ../../reference/compound_stmts.rst:241

msgid ":keyword:`!except` clause"

msgstr ":keyword:`!except` 子句"

#: ../../reference/compound_stmts.rst:243

msgid ""

"The :keyword:`!except` clause(s) specify one or more exception handlers. "

"When no exception occurs in the :keyword:`try` clause, no exception handler "

"is executed. When an exception occurs in the :keyword:`!try` suite, a search "

"for an exception handler is started. This search inspects the :keyword:`!"

"except` clauses in turn until one is found that matches the exception. An "

"expression-less :keyword:`!except` clause, if present, must be last; it "

"matches any exception."

msgstr ""

#: ../../reference/compound_stmts.rst:251

msgid ""

"For an :keyword:`!except` clause with an expression, the expression must "

"evaluate to an exception type or a tuple of exception types. Parentheses can "

"be dropped if multiple exception types are provided and the ``as`` clause is "

"not used. The raised exception matches an :keyword:`!except` clause whose "

"expression evaluates to the class or a :term:`non-virtual base class "

"<abstract base class>` of the exception object, or to a tuple that contains "

"such a class."

msgstr ""

#: ../../reference/compound_stmts.rst:258

msgid ""

"If no :keyword:`!except` clause matches the exception, the search for an "

"exception handler continues in the surrounding code and on the invocation "

"stack. [#]_"

msgstr ""

#: ../../reference/compound_stmts.rst:262

msgid ""

"If the evaluation of an expression in the header of an :keyword:`!except` "

"clause raises an exception, the original search for a handler is canceled "

"and a search starts for the new exception in the surrounding code and on the "

"call stack (it is treated as if the entire :keyword:`try` statement raised "

"the exception)."

msgstr ""

#: ../../reference/compound_stmts.rst:270

msgid ""

"When a matching :keyword:`!except` clause is found, the exception is "

"assigned to the target specified after the :keyword:`!as` keyword in that :"

"keyword:`!except` clause, if present, and the :keyword:`!except` clause's "

"suite is executed. All :keyword:`!except` clauses must have an executable "

"block. When the end of this block is reached, execution continues normally "

"after the entire :keyword:`try` statement. (This means that if two nested "

"handlers exist for the same exception, and the exception occurs in the :"

"keyword:`!try` clause of the inner handler, the outer handler will not "

"handle the exception.)"

msgstr ""

#: ../../reference/compound_stmts.rst:281

msgid ""

"When an exception has been assigned using ``as target``, it is cleared at "

"the end of the :keyword:`!except` clause. This is as if ::"

msgstr ""

#: ../../reference/compound_stmts.rst:284

msgid ""

"except E as N:\n"

" foo"

msgstr ""

"except E as N:\n"

" foo"

#: ../../reference/compound_stmts.rst:287

msgid "was translated to ::"

msgstr ""

#: ../../reference/compound_stmts.rst:289

msgid ""

"except E as N:\n"

" try:\n"

" foo\n"

" finally:\n"

" del N"

msgstr ""

"except E as N:\n"

" try:\n"

" foo\n"

" finally:\n"

" del N"

#: ../../reference/compound_stmts.rst:295

msgid ""

"This means the exception must be assigned to a different name to be able to "

"refer to it after the :keyword:`!except` clause. Exceptions are cleared "

"because with the traceback attached to them, they form a reference cycle "

"with the stack frame, keeping all locals in that frame alive until the next "

"garbage collection occurs."

msgstr ""

#: ../../reference/compound_stmts.rst:305

msgid ""

"Before an :keyword:`!except` clause's suite is executed, the exception is "

"stored in the :mod:`sys` module, where it can be accessed from within the "

"body of the :keyword:`!except` clause by calling :func:`sys.exception`. When "

"leaving an exception handler, the exception stored in the :mod:`sys` module "

"is reset to its previous value::"

msgstr ""

#: ../../reference/compound_stmts.rst:311

msgid ""

">>> print(sys.exception())\n"

"None\n"

">>> try:\n"

"... raise TypeError\n"

"... except:\n"

"... print(repr(sys.exception()))\n"

"... try:\n"

"... raise ValueError\n"

"... except:\n"

"... print(repr(sys.exception()))\n"

"... print(repr(sys.exception()))\n"

"...\n"

"TypeError()\n"

"ValueError()\n"

"TypeError()\n"

">>> print(sys.exception())\n"

"None"

msgstr ""

">>> print(sys.exception())\n"

"None\n"

">>> try:\n"

"... raise TypeError\n"

"... except:\n"

"... print(repr(sys.exception()))\n"

"... try:\n"

"... raise ValueError\n"

"... except:\n"

"... print(repr(sys.exception()))\n"

"... print(repr(sys.exception()))\n"

"...\n"

"TypeError()\n"

"ValueError()\n"

"TypeError()\n"

">>> print(sys.exception())\n"

"None"

#: ../../reference/compound_stmts.rst:336

msgid ":keyword:`!except*` clause"

msgstr ":keyword:`!except*` 子句"

#: ../../reference/compound_stmts.rst:338

msgid ""

"The :keyword:`!except*` clause(s) specify one or more handlers for groups of "

"exceptions (:exc:`BaseExceptionGroup` instances). A :keyword:`try` statement "

"can have either :keyword:`except` or :keyword:`!except*` clauses, but not "

"both. The exception type for matching is mandatory in the case of :keyword:`!"

"except*`, so ``except*:`` is a syntax error. The type is interpreted as in "

"the case of :keyword:`!except`, but matching is performed on the exceptions "

"contained in the group that is being handled. An :exc:`TypeError` is raised "

"if a matching type is a subclass of :exc:`!BaseExceptionGroup`, because that "

"would have ambiguous semantics."

msgstr ""

#: ../../reference/compound_stmts.rst:348

msgid ""

"When an exception group is raised in the try block, each :keyword:`!except*` "

"clause splits (see :meth:`~BaseExceptionGroup.split`) it into the subgroups "

"of matching and non-matching exceptions. If the matching subgroup is not "

"empty, it becomes the handled exception (the value returned from :func:`sys."

"exception`) and assigned to the target of the :keyword:`!except*` clause (if "

"there is one). Then, the body of the :keyword:`!except*` clause executes. If "

"the non-matching subgroup is not empty, it is processed by the next :keyword:"

"`!except*` in the same manner. This continues until all exceptions in the "

"group have been matched, or the last :keyword:`!except*` clause has run."

msgstr ""

#: ../../reference/compound_stmts.rst:358

msgid ""

"After all :keyword:`!except*` clauses execute, the group of unhandled "

"exceptions is merged with any exceptions that were raised or re-raised from "

"within :keyword:`!except*` clauses. This merged exception group propagates "

"on.::"

msgstr ""

#: ../../reference/compound_stmts.rst:362

msgid ""

">>> try:\n"

"... raise ExceptionGroup(\"eg\",\n"

"... [ValueError(1), TypeError(2), OSError(3), OSError(4)])\n"

"... except* TypeError as e:\n"

"... print(f'caught {type(e)} with nested {e.exceptions}')\n"

"... except* OSError as e:\n"

"... print(f'caught {type(e)} with nested {e.exceptions}')\n"

"...\n"

"caught <class 'ExceptionGroup'> with nested (TypeError(2),)\n"

"caught <class 'ExceptionGroup'> with nested (OSError(3), OSError(4))\n"

" + Exception Group Traceback (most recent call last):\n"

" | File \"<doctest default[0]>\", line 2, in <module>\n"

" | raise ExceptionGroup(\"eg\",\n"

" | [ValueError(1), TypeError(2), OSError(3), OSError(4)])\n"

" | ExceptionGroup: eg (1 sub-exception)\n"

" +-+---------------- 1 ----------------\n"

" | ValueError: 1\n"

" +------------------------------------"

msgstr ""

">>> try:\n"

"... raise ExceptionGroup(\"eg\",\n"

"... [ValueError(1), TypeError(2), OSError(3), OSError(4)])\n"

"... except* TypeError as e:\n"

"... print(f'caught {type(e)} with nested {e.exceptions}')\n"

"... except* OSError as e:\n"

"... print(f'caught {type(e)} with nested {e.exceptions}')\n"

"...\n"

"caught <class 'ExceptionGroup'> with nested (TypeError(2),)\n"

"caught <class 'ExceptionGroup'> with nested (OSError(3), OSError(4))\n"

" + Exception Group Traceback (most recent call last):\n"

" | File \"<doctest default[0]>\", line 2, in <module>\n"

" | raise ExceptionGroup(\"eg\",\n"

" | [ValueError(1), TypeError(2), OSError(3), OSError(4)])\n"

" | ExceptionGroup: eg (1 sub-exception)\n"

" +-+---------------- 1 ----------------\n"

" | ValueError: 1\n"

" +------------------------------------"

#: ../../reference/compound_stmts.rst:381

msgid ""

"If the exception raised from the :keyword:`try` block is not an exception "

"group and its type matches one of the :keyword:`!except*` clauses, it is "

"caught and wrapped by an exception group with an empty message string. This "

"ensures that the type of the target ``e`` is consistently :exc:"

"`BaseExceptionGroup`::"

msgstr ""

#: ../../reference/compound_stmts.rst:386

msgid ""

">>> try:\n"

"... raise BlockingIOError\n"

"... except* BlockingIOError as e:\n"

"... print(repr(e))\n"

"...\n"

"ExceptionGroup('', (BlockingIOError(),))"

msgstr ""

">>> try:\n"

"... raise BlockingIOError\n"

"... except* BlockingIOError as e:\n"

"... print(repr(e))\n"

"...\n"

"ExceptionGroup('', (BlockingIOError(),))"

#: ../../reference/compound_stmts.rst:393

msgid ""

":keyword:`break`, :keyword:`continue` and :keyword:`return` cannot appear in "

"an :keyword:`!except*` clause."

msgstr ""

#: ../../reference/compound_stmts.rst:406

msgid ":keyword:`!else` clause"

msgstr ":keyword:`!else` 子句"

#: ../../reference/compound_stmts.rst:408

msgid ""

"The optional :keyword:`!else` clause is executed if the control flow leaves "

"the :keyword:`try` suite, no exception was raised, and no :keyword:"

"`return`, :keyword:`continue`, or :keyword:`break` statement was executed. "

"Exceptions in the :keyword:`!else` clause are not handled by the preceding :"

"keyword:`except` clauses."

msgstr ""

#: ../../reference/compound_stmts.rst:420

msgid ":keyword:`!finally` clause"

msgstr ":keyword:`!finally` 子句"

#: ../../reference/compound_stmts.rst:422

msgid ""

"If :keyword:`!finally` is present, it specifies a 'cleanup' handler. The :"

"keyword:`try` clause is executed, including any :keyword:`except` and :"

"keyword:`else <except_else>` clauses. If an exception occurs in any of the "

"clauses and is not handled, the exception is temporarily saved. The :keyword:"

"`!finally` clause is executed. If there is a saved exception it is re-"

"raised at the end of the :keyword:`!finally` clause. If the :keyword:`!"

"finally` clause raises another exception, the saved exception is set as the "

"context of the new exception. If the :keyword:`!finally` clause executes a :"

"keyword:`return`, :keyword:`break` or :keyword:`continue` statement, the "

"saved exception is discarded. For example, this function returns 42."

msgstr ""

#: ../../reference/compound_stmts.rst:435

msgid ""

"def f():\n"

" try:\n"

" 1/0\n"

" finally:\n"

" return 42"

msgstr ""

"def f():\n"

" try:\n"

" 1/0\n"

" finally:\n"

" return 42"

#: ../../reference/compound_stmts.rst:443

msgid ""

"The exception information is not available to the program during execution "

"of the :keyword:`!finally` clause."

msgstr ""

#: ../../reference/compound_stmts.rst:451

msgid ""

"When a :keyword:`return`, :keyword:`break` or :keyword:`continue` statement "

"is executed in the :keyword:`try` suite of a :keyword:`!try`...\\ :keyword:`!"

"finally` statement, the :keyword:`!finally` clause is also executed 'on the "

"way out.'"

msgstr ""

#: ../../reference/compound_stmts.rst:455

msgid ""

"The return value of a function is determined by the last :keyword:`return` "

"statement executed. Since the :keyword:`!finally` clause always executes, "

"a :keyword:`!return` statement executed in the :keyword:`!finally` clause "

"will always be the last one executed. The following function returns "

"'finally'."

msgstr ""

#: ../../reference/compound_stmts.rst:460

msgid ""

"def foo():\n"

" try:\n"

" return 'try'\n"

" finally:\n"

" return 'finally'"

msgstr ""

"def foo():\n"

" try:\n"

" return 'try'\n"

" finally:\n"

" return 'finally'"

#: ../../reference/compound_stmts.rst:468

msgid ""

"Prior to Python 3.8, a :keyword:`continue` statement was illegal in the :"

"keyword:`!finally` clause due to a problem with the implementation."

msgstr ""

#: ../../reference/compound_stmts.rst:472

msgid ""

"The compiler emits a :exc:`SyntaxWarning` when a :keyword:`return`, :keyword:"

"`break` or :keyword:`continue` appears in a :keyword:`!finally` block (see :"

"pep:`765`)."

msgstr ""

#: ../../reference/compound_stmts.rst:482

msgid "The :keyword:`!with` statement"

msgstr ":keyword:`!with` 陳述式"

#: ../../reference/compound_stmts.rst:491

msgid ""

"The :keyword:`with` statement is used to wrap the execution of a block with "

"methods defined by a context manager (see section :ref:`context-managers`). "

"This allows common :keyword:`try`...\\ :keyword:`except`...\\ :keyword:"

"`finally` usage patterns to be encapsulated for convenient reuse."

msgstr ""

#: ../../reference/compound_stmts.rst:501

msgid ""

"The execution of the :keyword:`with` statement with one \"item\" proceeds as "

"follows:"

msgstr ""

#: ../../reference/compound_stmts.rst:503

msgid ""

"The context expression (the expression given in the :token:`~python-grammar:"

"with_item`) is evaluated to obtain a context manager."

msgstr ""

#: ../../reference/compound_stmts.rst:506

msgid ""

"The context manager's :meth:`~object.__enter__` is loaded for later use."

msgstr ""

#: ../../reference/compound_stmts.rst:508

msgid "The context manager's :meth:`~object.__exit__` is loaded for later use."

msgstr ""

#: ../../reference/compound_stmts.rst:510

msgid "The context manager's :meth:`~object.__enter__` method is invoked."

msgstr ""

#: ../../reference/compound_stmts.rst:512

msgid ""

"If a target was included in the :keyword:`with` statement, the return value "

"from :meth:`~object.__enter__` is assigned to it."

msgstr ""

#: ../../reference/compound_stmts.rst:517

msgid ""

"The :keyword:`with` statement guarantees that if the :meth:`~object."

"__enter__` method returns without an error, then :meth:`~object.__exit__` "

"will always be called. Thus, if an error occurs during the assignment to the "

"target list, it will be treated the same as an error occurring within the "

"suite would be. See step 7 below."

msgstr ""

#: ../../reference/compound_stmts.rst:523

msgid "The suite is executed."

msgstr ""

#: ../../reference/compound_stmts.rst:525

msgid ""

"The context manager's :meth:`~object.__exit__` method is invoked. If an "

"exception caused the suite to be exited, its type, value, and traceback are "

"passed as arguments to :meth:`~object.__exit__`. Otherwise, three :const:"

"`None` arguments are supplied."

msgstr ""

#: ../../reference/compound_stmts.rst:530

msgid ""

"If the suite was exited due to an exception, and the return value from the :"

"meth:`~object.__exit__` method was false, the exception is reraised. If the "

"return value was true, the exception is suppressed, and execution continues "

"with the statement following the :keyword:`with` statement."

msgstr ""

#: ../../reference/compound_stmts.rst:535

msgid ""

"If the suite was exited for any reason other than an exception, the return "

"value from :meth:`~object.__exit__` is ignored, and execution proceeds at "

"the normal location for the kind of exit that was taken."

msgstr ""

#: ../../reference/compound_stmts.rst:539

#: ../../reference/compound_stmts.rst:1560

#: ../../reference/compound_stmts.rst:1601

msgid "The following code::"

msgstr "以下程式碼： ::"

#: ../../reference/compound_stmts.rst:541

msgid ""

"with EXPRESSION as TARGET:\n"

" SUITE"

msgstr ""

"with EXPRESSION as TARGET:\n"

" SUITE"

#: ../../reference/compound_stmts.rst:544

#: ../../reference/compound_stmts.rst:572

#: ../../reference/compound_stmts.rst:1606

msgid "is semantically equivalent to::"

msgstr "在語義上等同於： ::"

#: ../../reference/compound_stmts.rst:546

msgid ""

"manager = (EXPRESSION)\n"

"enter = manager.__enter__\n"

"exit = manager.__exit__\n"

"value = enter()\n"

"hit_except = False\n"

"\n"

"try:\n"

" TARGET = value\n"

" SUITE\n"

"except:\n"

" hit_except = True\n"

" if not exit(*sys.exc_info()):\n"

" raise\n"

"finally:\n"

" if not hit_except:\n"

" exit(None, None, None)"

msgstr ""

"manager = (EXPRESSION)\n"

"enter = manager.__enter__\n"

"exit = manager.__exit__\n"

"value = enter()\n"

"hit_except = False\n"

"\n"

"try:\n"

" TARGET = value\n"

" SUITE\n"

"except:\n"

" hit_except = True\n"

" if not exit(*sys.exc_info()):\n"

" raise\n"

"finally:\n"

" if not hit_except:\n"

" exit(None, None, None)"

#: ../../reference/compound_stmts.rst:563

msgid ""

"except that implicit :ref:`special method lookup <special-lookup>` is used "

"for :meth:`~object.__enter__` and :meth:`~object.__exit__`."

msgstr ""

#: ../../reference/compound_stmts.rst:566

msgid ""

"With more than one item, the context managers are processed as if multiple :"

"keyword:`with` statements were nested::"

msgstr ""

#: ../../reference/compound_stmts.rst:569

msgid ""

"with A() as a, B() as b:\n"

" SUITE"

msgstr ""

"with A() as a, B() as b:\n"

" SUITE"

#: ../../reference/compound_stmts.rst:574

msgid ""

"with A() as a:\n"

" with B() as b:\n"

" SUITE"

msgstr ""

"with A() as a:\n"

" with B() as b:\n"

" SUITE"

#: ../../reference/compound_stmts.rst:578

msgid ""

"You can also write multi-item context managers in multiple lines if the "

"items are surrounded by parentheses. For example::"

msgstr ""

#: ../../reference/compound_stmts.rst:581

msgid ""

"with (\n"

" A() as a,\n"

" B() as b,\n"

"):\n"

" SUITE"

msgstr ""

"with (\n"

" A() as a,\n"

" B() as b,\n"

"):\n"

" SUITE"

#: ../../reference/compound_stmts.rst:587

msgid "Support for multiple context expressions."

msgstr ""

#: ../../reference/compound_stmts.rst:590

msgid ""

"Support for using grouping parentheses to break the statement in multiple "

"lines."

msgstr ""

#: ../../reference/compound_stmts.rst:595

msgid ":pep:`343` - The \"with\" statement"

msgstr ":pep:`343` - \"with\" 陳述式"

#: ../../reference/compound_stmts.rst:596

msgid ""

"The specification, background, and examples for the Python :keyword:`with` "

"statement."

msgstr ""

#: ../../reference/compound_stmts.rst:603

msgid "The :keyword:`!match` statement"

msgstr ":keyword:`!match` 陳述式"

#: ../../reference/compound_stmts.rst:617

msgid "The match statement is used for pattern matching. Syntax:"

msgstr ""

#: ../../reference/compound_stmts.rst:626

msgid ""

"This section uses single quotes to denote :ref:`soft keywords <soft-"

"keywords>`."

msgstr ""

#: ../../reference/compound_stmts.rst:629

msgid ""

"Pattern matching takes a pattern as input (following ``case``) and a subject "

"value (following ``match``). The pattern (which may contain subpatterns) is "

"matched against the subject value. The outcomes are:"

msgstr ""

#: ../../reference/compound_stmts.rst:633

msgid "A match success or failure (also termed a pattern success or failure)."

msgstr ""

#: ../../reference/compound_stmts.rst:635

msgid ""

"Possible binding of matched values to a name. The prerequisites for this "

"are further discussed below."

msgstr ""

#: ../../reference/compound_stmts.rst:638

msgid ""

"The ``match`` and ``case`` keywords are :ref:`soft keywords <soft-keywords>`."

msgstr ""

#: ../../reference/compound_stmts.rst:642

#: ../../reference/compound_stmts.rst:1199

msgid ":pep:`634` -- Structural Pattern Matching: Specification"

msgstr ""

#: ../../reference/compound_stmts.rst:643

#: ../../reference/compound_stmts.rst:1200

msgid ":pep:`636` -- Structural Pattern Matching: Tutorial"

msgstr ""

#: ../../reference/compound_stmts.rst:647

msgid "Overview"

msgstr ""

#: ../../reference/compound_stmts.rst:649

msgid "Here's an overview of the logical flow of a match statement:"

msgstr ""

#: ../../reference/compound_stmts.rst:652

msgid ""

"The subject expression ``subject_expr`` is evaluated and a resulting subject "

"value obtained. If the subject expression contains a comma, a tuple is "

"constructed using :ref:`the standard rules <typesseq-tuple>`."

msgstr ""

#: ../../reference/compound_stmts.rst:656

msgid ""

"Each pattern in a ``case_block`` is attempted to match with the subject "

"value. The specific rules for success or failure are described below. The "

"match attempt can also bind some or all of the standalone names within the "

"pattern. The precise pattern binding rules vary per pattern type and are "

"specified below. **Name bindings made during a successful pattern match "

"outlive the executed block and can be used after the match statement**."

msgstr ""

#: ../../reference/compound_stmts.rst:665

msgid ""

"During failed pattern matches, some subpatterns may succeed. Do not rely on "

"bindings being made for a failed match. Conversely, do not rely on "

"variables remaining unchanged after a failed match. The exact behavior is "

"dependent on implementation and may vary. This is an intentional decision "

"made to allow different implementations to add optimizations."

msgstr ""

#: ../../reference/compound_stmts.rst:672

msgid ""

"If the pattern succeeds, the corresponding guard (if present) is evaluated. "

"In this case all name bindings are guaranteed to have happened."

msgstr ""

#: ../../reference/compound_stmts.rst:675

msgid ""

"If the guard evaluates as true or is missing, the ``block`` inside "

"``case_block`` is executed."

msgstr ""

#: ../../reference/compound_stmts.rst:678

msgid "Otherwise, the next ``case_block`` is attempted as described above."

msgstr ""

#: ../../reference/compound_stmts.rst:680

msgid "If there are no further case blocks, the match statement is completed."

msgstr ""

#: ../../reference/compound_stmts.rst:684

msgid ""

"Users should generally never rely on a pattern being evaluated. Depending "

"on implementation, the interpreter may cache values or use other "

"optimizations which skip repeated evaluations."

msgstr ""

#: ../../reference/compound_stmts.rst:688

msgid "A sample match statement::"

msgstr ""

#: ../../reference/compound_stmts.rst:690

msgid ""

">>> flag = False\n"

">>> match (100, 200):\n"

"... case (100, 300): # Mismatch: 200 != 300\n"

"... print('Case 1')\n"

"... case (100, 200) if flag: # Successful match, but guard fails\n"

"... print('Case 2')\n"

"... case (100, y): # Matches and binds y to 200\n"

"... print(f'Case 3, y: {y}')\n"

"... case _: # Pattern not attempted\n"

"... print('Case 4, I match anything!')\n"

"...\n"

"Case 3, y: 200"

msgstr ""

#: ../../reference/compound_stmts.rst:704

msgid ""

"In this case, ``if flag`` is a guard. Read more about that in the next "

"section."

msgstr ""

#: ../../reference/compound_stmts.rst:707

msgid "Guards"

msgstr ""

#: ../../reference/compound_stmts.rst:714

msgid ""

"A ``guard`` (which is part of the ``case``) must succeed for code inside the "

"``case`` block to execute. It takes the form: :keyword:`if` followed by an "

"expression."

msgstr ""

#: ../../reference/compound_stmts.rst:719

msgid "The logical flow of a ``case`` block with a ``guard`` follows:"

msgstr ""

#: ../../reference/compound_stmts.rst:721

msgid ""

"Check that the pattern in the ``case`` block succeeded. If the pattern "

"failed, the ``guard`` is not evaluated and the next ``case`` block is "

"checked."

msgstr ""

#: ../../reference/compound_stmts.rst:725

msgid "If the pattern succeeded, evaluate the ``guard``."

msgstr ""

#: ../../reference/compound_stmts.rst:727

msgid ""

"If the ``guard`` condition evaluates as true, the case block is selected."

msgstr ""

#: ../../reference/compound_stmts.rst:730

msgid ""

"If the ``guard`` condition evaluates as false, the case block is not "

"selected."

msgstr ""

#: ../../reference/compound_stmts.rst:733

msgid ""

"If the ``guard`` raises an exception during evaluation, the exception "

"bubbles up."

msgstr ""

#: ../../reference/compound_stmts.rst:736

msgid ""

"Guards are allowed to have side effects as they are expressions. Guard "

"evaluation must proceed from the first to the last case block, one at a "

"time, skipping case blocks whose pattern(s) don't all succeed. (I.e., guard "

"evaluation must happen in order.) Guard evaluation must stop once a case "

"block is selected."

msgstr ""

#: ../../reference/compound_stmts.rst:746

msgid "Irrefutable Case Blocks"

msgstr ""

#: ../../reference/compound_stmts.rst:750

msgid ""

"An irrefutable case block is a match-all case block. A match statement may "

"have at most one irrefutable case block, and it must be last."

msgstr ""

#: ../../reference/compound_stmts.rst:753

msgid ""

"A case block is considered irrefutable if it has no guard and its pattern is "

"irrefutable. A pattern is considered irrefutable if we can prove from its "

"syntax alone that it will always succeed. Only the following patterns are "

"irrefutable:"

msgstr ""

#: ../../reference/compound_stmts.rst:758

msgid ":ref:`as-patterns` whose left-hand side is irrefutable"

msgstr ""

#: ../../reference/compound_stmts.rst:760

msgid ":ref:`or-patterns` containing at least one irrefutable pattern"

msgstr ""

#: ../../reference/compound_stmts.rst:762

msgid ":ref:`capture-patterns`"

msgstr ":ref:`capture-patterns`"

#: ../../reference/compound_stmts.rst:764

msgid ":ref:`wildcard-patterns`"

msgstr ":ref:`wildcard-patterns`"

#: ../../reference/compound_stmts.rst:766

msgid "parenthesized irrefutable patterns"

msgstr ""

#: ../../reference/compound_stmts.rst:770

msgid "Patterns"

msgstr ""

#: ../../reference/compound_stmts.rst:777

msgid "This section uses grammar notations beyond standard EBNF:"

msgstr ""

#: ../../reference/compound_stmts.rst:779