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1039 lines (886 loc) · 37.9 KB
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# Copyright (C) 2001-2020, Python Software Foundation
# This file is distributed under the same license as the Python package.
# Maintained by the python-doc-es workteam.
# docs-es@python.org /
# https://mail.python.org/mailman3/lists/docs-es.python.org/
# Check https://github.com/python/python-docs-es/blob/3.8/TRANSLATORS to
# get the list of volunteers
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: Python 3.8\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2020-05-05 12:54+0200\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: python-doc-es\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=utf-8\n"
"Content-Transfer-Encoding: 8bit\n"
"Generated-By: Babel 2.8.0\n"
#: ../Doc/reference/simple_stmts.rst:6
msgid "Simple statements"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:10
msgid ""
"A simple statement is comprised within a single logical line. Several simple "
"statements may occur on a single line separated by semicolons. The syntax "
"for simple statements is:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:36
msgid "Expression statements"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:43
msgid ""
"Expression statements are used (mostly interactively) to compute and write a "
"value, or (usually) to call a procedure (a function that returns no "
"meaningful result; in Python, procedures return the value ``None``). Other "
"uses of expression statements are allowed and occasionally useful. The "
"syntax for an expression statement is:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:52
msgid ""
"An expression statement evaluates the expression list (which may be a single "
"expression)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:64
msgid ""
"In interactive mode, if the value is not ``None``, it is converted to a "
"string using the built-in :func:`repr` function and the resulting string is "
"written to standard output on a line by itself (except if the result is "
"``None``, so that procedure calls do not cause any output.)"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:72
msgid "Assignment statements"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:82
msgid ""
"Assignment statements are used to (re)bind names to values and to modify "
"attributes or items of mutable objects:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:96
msgid ""
"(See section :ref:`primaries` for the syntax definitions for *attributeref*, "
"*subscription*, and *slicing*.)"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:99
msgid ""
"An assignment statement evaluates the expression list (remember that this "
"can be a single expression or a comma-separated list, the latter yielding a "
"tuple) and assigns the single resulting object to each of the target lists, "
"from left to right."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:108
msgid ""
"Assignment is defined recursively depending on the form of the target "
"(list). When a target is part of a mutable object (an attribute reference, "
"subscription or slicing), the mutable object must ultimately perform the "
"assignment and decide about its validity, and may raise an exception if the "
"assignment is unacceptable. The rules observed by various types and the "
"exceptions raised are given with the definition of the object types (see "
"section :ref:`types`)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:121
msgid ""
"Assignment of an object to a target list, optionally enclosed in parentheses "
"or square brackets, is recursively defined as follows."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:124
msgid ""
"If the target list is a single target with no trailing comma, optionally in "
"parentheses, the object is assigned to that target."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:127 ../Doc/reference/simple_stmts.rst:139
msgid ""
"Else: The object must be an iterable with the same number of items as there "
"are targets in the target list, and the items are assigned, from left to "
"right, to the corresponding targets."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:131
msgid ""
"If the target list contains one target prefixed with an asterisk, called a "
"\"starred\" target: The object must be an iterable with at least as many "
"items as there are targets in the target list, minus one. The first items "
"of the iterable are assigned, from left to right, to the targets before the "
"starred target. The final items of the iterable are assigned to the targets "
"after the starred target. A list of the remaining items in the iterable is "
"then assigned to the starred target (the list can be empty)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:143
msgid ""
"Assignment of an object to a single target is recursively defined as follows."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:145
msgid "If the target is an identifier (name):"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:147
msgid ""
"If the name does not occur in a :keyword:`global` or :keyword:`nonlocal` "
"statement in the current code block: the name is bound to the object in the "
"current local namespace."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:151
msgid ""
"Otherwise: the name is bound to the object in the global namespace or the "
"outer namespace determined by :keyword:`nonlocal`, respectively."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:156
msgid ""
"The name is rebound if it was already bound. This may cause the reference "
"count for the object previously bound to the name to reach zero, causing the "
"object to be deallocated and its destructor (if it has one) to be called."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:162
msgid ""
"If the target is an attribute reference: The primary expression in the "
"reference is evaluated. It should yield an object with assignable "
"attributes; if this is not the case, :exc:`TypeError` is raised. That "
"object is then asked to assign the assigned object to the given attribute; "
"if it cannot perform the assignment, it raises an exception (usually but not "
"necessarily :exc:`AttributeError`)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:171
msgid ""
"Note: If the object is a class instance and the attribute reference occurs "
"on both sides of the assignment operator, the right-hand side expression, "
"``a.x`` can access either an instance attribute or (if no instance attribute "
"exists) a class attribute. The left-hand side target ``a.x`` is always set "
"as an instance attribute, creating it if necessary. Thus, the two "
"occurrences of ``a.x`` do not necessarily refer to the same attribute: if "
"the right-hand side expression refers to a class attribute, the left-hand "
"side creates a new instance attribute as the target of the assignment::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:185
msgid ""
"This description does not necessarily apply to descriptor attributes, such "
"as properties created with :func:`property`."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:192
msgid ""
"If the target is a subscription: The primary expression in the reference is "
"evaluated. It should yield either a mutable sequence object (such as a "
"list) or a mapping object (such as a dictionary). Next, the subscript "
"expression is evaluated."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:201
msgid ""
"If the primary is a mutable sequence object (such as a list), the subscript "
"must yield an integer. If it is negative, the sequence's length is added to "
"it. The resulting value must be a nonnegative integer less than the "
"sequence's length, and the sequence is asked to assign the assigned object "
"to its item with that index. If the index is out of range, :exc:"
"`IndexError` is raised (assignment to a subscripted sequence cannot add new "
"items to a list)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:212
msgid ""
"If the primary is a mapping object (such as a dictionary), the subscript "
"must have a type compatible with the mapping's key type, and the mapping is "
"then asked to create a key/datum pair which maps the subscript to the "
"assigned object. This can either replace an existing key/value pair with "
"the same key value, or insert a new key/value pair (if no key with the same "
"value existed)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:218
msgid ""
"For user-defined objects, the :meth:`__setitem__` method is called with "
"appropriate arguments."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:223
msgid ""
"If the target is a slicing: The primary expression in the reference is "
"evaluated. It should yield a mutable sequence object (such as a list). The "
"assigned object should be a sequence object of the same type. Next, the "
"lower and upper bound expressions are evaluated, insofar they are present; "
"defaults are zero and the sequence's length. The bounds should evaluate to "
"integers. If either bound is negative, the sequence's length is added to "
"it. The resulting bounds are clipped to lie between zero and the sequence's "
"length, inclusive. Finally, the sequence object is asked to replace the "
"slice with the items of the assigned sequence. The length of the slice may "
"be different from the length of the assigned sequence, thus changing the "
"length of the target sequence, if the target sequence allows it."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:237
msgid ""
"In the current implementation, the syntax for targets is taken to be the "
"same as for expressions, and invalid syntax is rejected during the code "
"generation phase, causing less detailed error messages."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:241
msgid ""
"Although the definition of assignment implies that overlaps between the left-"
"hand side and the right-hand side are 'simultaneous' (for example ``a, b = "
"b, a`` swaps two variables), overlaps *within* the collection of assigned-to "
"variables occur left-to-right, sometimes resulting in confusion. For "
"instance, the following program prints ``[0, 2]``::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:255
msgid ":pep:`3132` - Extended Iterable Unpacking"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:256
msgid "The specification for the ``*target`` feature."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:262
msgid "Augmented assignment statements"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:280
msgid ""
"Augmented assignment is the combination, in a single statement, of a binary "
"operation and an assignment statement:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:289
msgid ""
"(See section :ref:`primaries` for the syntax definitions of the last three "
"symbols.)"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:292
msgid ""
"An augmented assignment evaluates the target (which, unlike normal "
"assignment statements, cannot be an unpacking) and the expression list, "
"performs the binary operation specific to the type of assignment on the two "
"operands, and assigns the result to the original target. The target is only "
"evaluated once."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:297
msgid ""
"An augmented assignment expression like ``x += 1`` can be rewritten as ``x = "
"x + 1`` to achieve a similar, but not exactly equal effect. In the augmented "
"version, ``x`` is only evaluated once. Also, when possible, the actual "
"operation is performed *in-place*, meaning that rather than creating a new "
"object and assigning that to the target, the old object is modified instead."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:303
msgid ""
"Unlike normal assignments, augmented assignments evaluate the left-hand side "
"*before* evaluating the right-hand side. For example, ``a[i] += f(x)`` "
"first looks-up ``a[i]``, then it evaluates ``f(x)`` and performs the "
"addition, and lastly, it writes the result back to ``a[i]``."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:308
msgid ""
"With the exception of assigning to tuples and multiple targets in a single "
"statement, the assignment done by augmented assignment statements is handled "
"the same way as normal assignments. Similarly, with the exception of the "
"possible *in-place* behavior, the binary operation performed by augmented "
"assignment is the same as the normal binary operations."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:314
msgid ""
"For targets which are attribute references, the same :ref:`caveat about "
"class and instance attributes <attr-target-note>` applies as for regular "
"assignments."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:321
msgid "Annotated assignment statements"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:328
msgid ""
":term:`Annotation <variable annotation>` assignment is the combination, in a "
"single statement, of a variable or attribute annotation and an optional "
"assignment statement:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:335
msgid ""
"The difference from normal :ref:`assignment` is that only single target is "
"allowed."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:337
msgid ""
"For simple names as assignment targets, if in class or module scope, the "
"annotations are evaluated and stored in a special class or module attribute :"
"attr:`__annotations__` that is a dictionary mapping from variable names "
"(mangled if private) to evaluated annotations. This attribute is writable "
"and is automatically created at the start of class or module body execution, "
"if annotations are found statically."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:345
msgid ""
"For expressions as assignment targets, the annotations are evaluated if in "
"class or module scope, but not stored."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:348
msgid ""
"If a name is annotated in a function scope, then this name is local for that "
"scope. Annotations are never evaluated and stored in function scopes."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:351
msgid ""
"If the right hand side is present, an annotated assignment performs the "
"actual assignment before evaluating annotations (where applicable). If the "
"right hand side is not present for an expression target, then the "
"interpreter evaluates the target except for the last :meth:`__setitem__` or :"
"meth:`__setattr__` call."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:362
msgid ":pep:`526` - Syntax for Variable Annotations"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:360
msgid ""
"The proposal that added syntax for annotating the types of variables "
"(including class variables and instance variables), instead of expressing "
"them through comments."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:366
msgid ":pep:`484` - Type hints"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:365
msgid ""
"The proposal that added the :mod:`typing` module to provide a standard "
"syntax for type annotations that can be used in static analysis tools and "
"IDEs."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:369
msgid ""
"Now annotated assignments allow same expressions in the right hand side as "
"the regular assignments. Previously, some expressions (like un-parenthesized "
"tuple expressions) caused a syntax error."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:378
msgid "The :keyword:`!assert` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:385
msgid ""
"Assert statements are a convenient way to insert debugging assertions into a "
"program:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:391
msgid "The simple form, ``assert expression``, is equivalent to ::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:396
msgid ""
"The extended form, ``assert expression1, expression2``, is equivalent to ::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:405
msgid ""
"These equivalences assume that :const:`__debug__` and :exc:`AssertionError` "
"refer to the built-in variables with those names. In the current "
"implementation, the built-in variable :const:`__debug__` is ``True`` under "
"normal circumstances, ``False`` when optimization is requested (command line "
"option :option:`-O`). The current code generator emits no code for an "
"assert statement when optimization is requested at compile time. Note that "
"it is unnecessary to include the source code for the expression that failed "
"in the error message; it will be displayed as part of the stack trace."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:414
msgid ""
"Assignments to :const:`__debug__` are illegal. The value for the built-in "
"variable is determined when the interpreter starts."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:421
msgid "The :keyword:`!pass` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:431
msgid ""
":keyword:`pass` is a null operation --- when it is executed, nothing "
"happens. It is useful as a placeholder when a statement is required "
"syntactically, but no code needs to be executed, for example::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:443
msgid "The :keyword:`!del` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:453
msgid ""
"Deletion is recursively defined very similar to the way assignment is "
"defined. Rather than spelling it out in full details, here are some hints."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:456
msgid ""
"Deletion of a target list recursively deletes each target, from left to "
"right."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:462
msgid ""
"Deletion of a name removes the binding of that name from the local or global "
"namespace, depending on whether the name occurs in a :keyword:`global` "
"statement in the same code block. If the name is unbound, a :exc:"
"`NameError` exception will be raised."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:469
msgid ""
"Deletion of attribute references, subscriptions and slicings is passed to "
"the primary object involved; deletion of a slicing is in general equivalent "
"to assignment of an empty slice of the right type (but even this is "
"determined by the sliced object)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:474
msgid ""
"Previously it was illegal to delete a name from the local namespace if it "
"occurs as a free variable in a nested block."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:482
msgid "The :keyword:`!return` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:492
msgid ""
":keyword:`return` may only occur syntactically nested in a function "
"definition, not within a nested class definition."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:495
msgid ""
"If an expression list is present, it is evaluated, else ``None`` is "
"substituted."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:497
msgid ""
":keyword:`return` leaves the current function call with the expression list "
"(or ``None``) as return value."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:502
msgid ""
"When :keyword:`return` passes control out of a :keyword:`try` statement with "
"a :keyword:`finally` clause, that :keyword:`!finally` clause is executed "
"before really leaving the function."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:506
msgid ""
"In a generator function, the :keyword:`return` statement indicates that the "
"generator is done and will cause :exc:`StopIteration` to be raised. The "
"returned value (if any) is used as an argument to construct :exc:"
"`StopIteration` and becomes the :attr:`StopIteration.value` attribute."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:511
msgid ""
"In an asynchronous generator function, an empty :keyword:`return` statement "
"indicates that the asynchronous generator is done and will cause :exc:"
"`StopAsyncIteration` to be raised. A non-empty :keyword:`!return` statement "
"is a syntax error in an asynchronous generator function."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:519
msgid "The :keyword:`!yield` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:531
msgid ""
"A :keyword:`yield` statement is semantically equivalent to a :ref:`yield "
"expression <yieldexpr>`. The yield statement can be used to omit the "
"parentheses that would otherwise be required in the equivalent yield "
"expression statement. For example, the yield statements ::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:539
msgid "are equivalent to the yield expression statements ::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:544
msgid ""
"Yield expressions and statements are only used when defining a :term:"
"`generator` function, and are only used in the body of the generator "
"function. Using yield in a function definition is sufficient to cause that "
"definition to create a generator function instead of a normal function."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:549
msgid ""
"For full details of :keyword:`yield` semantics, refer to the :ref:"
"`yieldexpr` section."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:555
msgid "The :keyword:`!raise` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:566
msgid ""
"If no expressions are present, :keyword:`raise` re-raises the last exception "
"that was active in the current scope. If no exception is active in the "
"current scope, a :exc:`RuntimeError` exception is raised indicating that "
"this is an error."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:571
msgid ""
"Otherwise, :keyword:`raise` evaluates the first expression as the exception "
"object. It must be either a subclass or an instance of :class:"
"`BaseException`. If it is a class, the exception instance will be obtained "
"when needed by instantiating the class with no arguments."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:576
msgid ""
"The :dfn:`type` of the exception is the exception instance's class, the :dfn:"
"`value` is the instance itself."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:581
msgid ""
"A traceback object is normally created automatically when an exception is "
"raised and attached to it as the :attr:`__traceback__` attribute, which is "
"writable. You can create an exception and set your own traceback in one step "
"using the :meth:`with_traceback` exception method (which returns the same "
"exception instance, with its traceback set to its argument), like so::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:593
msgid ""
"The ``from`` clause is used for exception chaining: if given, the second "
"*expression* must be another exception class or instance, which will then be "
"attached to the raised exception as the :attr:`__cause__` attribute (which "
"is writable). If the raised exception is not handled, both exceptions will "
"be printed::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:614
msgid ""
"A similar mechanism works implicitly if an exception is raised inside an "
"exception handler or a :keyword:`finally` clause: the previous exception is "
"then attached as the new exception's :attr:`__context__` attribute::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:633
msgid ""
"Exception chaining can be explicitly suppressed by specifying :const:`None` "
"in the ``from`` clause::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:645
msgid ""
"Additional information on exceptions can be found in section :ref:"
"`exceptions`, and information about handling exceptions is in section :ref:"
"`try`."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:648
msgid ":const:`None` is now permitted as ``Y`` in ``raise X from Y``."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:651
msgid ""
"The ``__suppress_context__`` attribute to suppress automatic display of the "
"exception context."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:658
msgid "The :keyword:`!break` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:669
msgid ""
":keyword:`break` may only occur syntactically nested in a :keyword:`for` or :"
"keyword:`while` loop, but not nested in a function or class definition "
"within that loop."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:676
msgid ""
"It terminates the nearest enclosing loop, skipping the optional :keyword:`!"
"else` clause if the loop has one."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:679
msgid ""
"If a :keyword:`for` loop is terminated by :keyword:`break`, the loop control "
"target keeps its current value."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:684
msgid ""
"When :keyword:`break` passes control out of a :keyword:`try` statement with "
"a :keyword:`finally` clause, that :keyword:`!finally` clause is executed "
"before really leaving the loop."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:692
msgid "The :keyword:`!continue` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:704
msgid ""
":keyword:`continue` may only occur syntactically nested in a :keyword:`for` "
"or :keyword:`while` loop, but not nested in a function or class definition "
"within that loop. It continues with the next cycle of the nearest enclosing "
"loop."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:708
msgid ""
"When :keyword:`continue` passes control out of a :keyword:`try` statement "
"with a :keyword:`finally` clause, that :keyword:`!finally` clause is "
"executed before really starting the next loop cycle."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:717
msgid "The :keyword:`!import` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:738
msgid ""
"The basic import statement (no :keyword:`from` clause) is executed in two "
"steps:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:741
msgid "find a module, loading and initializing it if necessary"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:742
msgid ""
"define a name or names in the local namespace for the scope where the :"
"keyword:`import` statement occurs."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:745
msgid ""
"When the statement contains multiple clauses (separated by commas) the two "
"steps are carried out separately for each clause, just as though the clauses "
"had been separated out into individual import statements."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:750
msgid ""
"The details of the first step, finding and loading modules are described in "
"greater detail in the section on the :ref:`import system <importsystem>`, "
"which also describes the various types of packages and modules that can be "
"imported, as well as all the hooks that can be used to customize the import "
"system. Note that failures in this step may indicate either that the module "
"could not be located, *or* that an error occurred while initializing the "
"module, which includes execution of the module's code."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:758
msgid ""
"If the requested module is retrieved successfully, it will be made available "
"in the local namespace in one of three ways:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:763
msgid ""
"If the module name is followed by :keyword:`!as`, then the name following :"
"keyword:`!as` is bound directly to the imported module."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:765
msgid ""
"If no other name is specified, and the module being imported is a top level "
"module, the module's name is bound in the local namespace as a reference to "
"the imported module"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:768
msgid ""
"If the module being imported is *not* a top level module, then the name of "
"the top level package that contains the module is bound in the local "
"namespace as a reference to the top level package. The imported module must "
"be accessed using its full qualified name rather than directly"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:778
msgid "The :keyword:`from` form uses a slightly more complex process:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:780
msgid ""
"find the module specified in the :keyword:`from` clause, loading and "
"initializing it if necessary;"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:782
msgid "for each of the identifiers specified in the :keyword:`import` clauses:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:784
msgid "check if the imported module has an attribute by that name"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:785
msgid ""
"if not, attempt to import a submodule with that name and then check the "
"imported module again for that attribute"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:787
msgid "if the attribute is not found, :exc:`ImportError` is raised."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:788
msgid ""
"otherwise, a reference to that value is stored in the local namespace, using "
"the name in the :keyword:`!as` clause if it is present, otherwise using the "
"attribute name"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:792
msgid "Examples::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:802
msgid ""
"If the list of identifiers is replaced by a star (``'*'``), all public names "
"defined in the module are bound in the local namespace for the scope where "
"the :keyword:`import` statement occurs."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:808
msgid ""
"The *public names* defined by a module are determined by checking the "
"module's namespace for a variable named ``__all__``; if defined, it must be "
"a sequence of strings which are names defined or imported by that module. "
"The names given in ``__all__`` are all considered public and are required to "
"exist. If ``__all__`` is not defined, the set of public names includes all "
"names found in the module's namespace which do not begin with an underscore "
"character (``'_'``). ``__all__`` should contain the entire public API. It "
"is intended to avoid accidentally exporting items that are not part of the "
"API (such as library modules which were imported and used within the module)."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:818
msgid ""
"The wild card form of import --- ``from module import *`` --- is only "
"allowed at the module level. Attempting to use it in class or function "
"definitions will raise a :exc:`SyntaxError`."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:825
msgid ""
"When specifying what module to import you do not have to specify the "
"absolute name of the module. When a module or package is contained within "
"another package it is possible to make a relative import within the same top "
"package without having to mention the package name. By using leading dots in "
"the specified module or package after :keyword:`from` you can specify how "
"high to traverse up the current package hierarchy without specifying exact "
"names. One leading dot means the current package where the module making the "
"import exists. Two dots means up one package level. Three dots is up two "
"levels, etc. So if you execute ``from . import mod`` from a module in the "
"``pkg`` package then you will end up importing ``pkg.mod``. If you execute "
"``from ..subpkg2 import mod`` from within ``pkg.subpkg1`` you will import "
"``pkg.subpkg2.mod``. The specification for relative imports is contained in "
"the :ref:`relativeimports` section."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:839
msgid ""
":func:`importlib.import_module` is provided to support applications that "
"determine dynamically the modules to be loaded."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:843
msgid ""
"Raises an :ref:`auditing event <auditing>` ``import`` with arguments "
"``module``, ``filename``, ``sys.path``, ``sys.meta_path``, ``sys."
"path_hooks``."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:847
msgid "Future statements"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:853
msgid ""
"A :dfn:`future statement` is a directive to the compiler that a particular "
"module should be compiled using syntax or semantics that will be available "
"in a specified future release of Python where the feature becomes standard."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:857
msgid ""
"The future statement is intended to ease migration to future versions of "
"Python that introduce incompatible changes to the language. It allows use "
"of the new features on a per-module basis before the release in which the "
"feature becomes standard."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:869
msgid ""
"A future statement must appear near the top of the module. The only lines "
"that can appear before a future statement are:"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:872
msgid "the module docstring (if any),"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:873
msgid "comments,"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:874
msgid "blank lines, and"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:875
msgid "other future statements."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:877
msgid ""
"The only feature in Python 3.7 that requires using the future statement is "
"``annotations``."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:880
msgid ""
"All historical features enabled by the future statement are still recognized "
"by Python 3. The list includes ``absolute_import``, ``division``, "
"``generators``, ``generator_stop``, ``unicode_literals``, "
"``print_function``, ``nested_scopes`` and ``with_statement``. They are all "
"redundant because they are always enabled, and only kept for backwards "
"compatibility."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:887
msgid ""
"A future statement is recognized and treated specially at compile time: "
"Changes to the semantics of core constructs are often implemented by "
"generating different code. It may even be the case that a new feature "
"introduces new incompatible syntax (such as a new reserved word), in which "
"case the compiler may need to parse the module differently. Such decisions "
"cannot be pushed off until runtime."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:894
msgid ""
"For any given release, the compiler knows which feature names have been "
"defined, and raises a compile-time error if a future statement contains a "
"feature not known to it."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:898
msgid ""
"The direct runtime semantics are the same as for any import statement: there "
"is a standard module :mod:`__future__`, described later, and it will be "
"imported in the usual way at the time the future statement is executed."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:902
msgid ""
"The interesting runtime semantics depend on the specific feature enabled by "
"the future statement."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:905
msgid "Note that there is nothing special about the statement::"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:909
msgid ""
"That is not a future statement; it's an ordinary import statement with no "
"special semantics or syntax restrictions."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:912
msgid ""
"Code compiled by calls to the built-in functions :func:`exec` and :func:"
"`compile` that occur in a module :mod:`M` containing a future statement "
"will, by default, use the new syntax or semantics associated with the future "
"statement. This can be controlled by optional arguments to :func:`compile` "
"--- see the documentation of that function for details."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:918
msgid ""
"A future statement typed at an interactive interpreter prompt will take "
"effect for the rest of the interpreter session. If an interpreter is "
"started with the :option:`-i` option, is passed a script name to execute, "
"and the script includes a future statement, it will be in effect in the "
"interactive session started after the script is executed."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:926
msgid ":pep:`236` - Back to the __future__"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:927
msgid "The original proposal for the __future__ mechanism."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:933
msgid "The :keyword:`!global` statement"
msgstr ""
#: ../Doc/reference/simple_stmts.rst:943
msgid ""
"The :keyword:`global` statement is a declaration which holds for the entire "
"current code block. It means that the listed identifiers are to be "
"interpreted as globals. It would be impossible to assign to a global "
"variable without :keyword:`!global`, although free variables may refer to "
"globals without being declared global."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:949
msgid ""
"Names listed in a :keyword:`global` statement must not be used in the same "
"code block textually preceding that :keyword:`!global` statement."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:952
msgid ""
"Names listed in a :keyword:`global` statement must not be defined as formal "
"parameters or in a :keyword:`for` loop control target, :keyword:`class` "
"definition, function definition, :keyword:`import` statement, or variable "
"annotation."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:959
msgid ""
"The current implementation does not enforce some of these restrictions, but "
"programs should not abuse this freedom, as future implementations may "
"enforce them or silently change the meaning of the program."
msgstr ""
#: ../Doc/reference/simple_stmts.rst:968
msgid ""
"**Programmer's note:** :keyword:`global` is a directive to the parser. It "
"applies only to code parsed at the same time as the :keyword:`!global` "
"statement. In particular, a :keyword:`!global` statement contained in a "
"string or code object supplied to the built-in :func:`exec` function does "
"not affect the code block *containing* the function call, and code contained "