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2397 lines (2083 loc) · 91 KB
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# SOME DESCRIPTIVE TITLE.
# Copyright (C) 2001-2025, Python Software Foundation
# This file is distributed under the same license as the Python package.
# FIRST AUTHOR <EMAIL@ADDRESS>, YEAR.
#
#, fuzzy
msgid ""
msgstr ""
"Project-Id-Version: Python 3.13\n"
"Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2025-02-10 02:51+0330\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n"
"MIME-Version: 1.0\n"
"Content-Type: text/plain; charset=UTF-8\n"
"Content-Transfer-Encoding: 8bit\n"
#: library/ast.rst:2
msgid ":mod:`!ast` --- Abstract Syntax Trees"
msgstr ""
#: library/ast.rst:14
msgid "**Source code:** :source:`Lib/ast.py`"
msgstr ""
#: library/ast.rst:18
msgid "The :mod:`ast` module helps Python applications to process trees of the Python abstract syntax grammar. The abstract syntax itself might change with each Python release; this module helps to find out programmatically what the current grammar looks like."
msgstr ""
#: library/ast.rst:23
msgid "An abstract syntax tree can be generated by passing :data:`ast.PyCF_ONLY_AST` as a flag to the :func:`compile` built-in function, or using the :func:`parse` helper provided in this module. The result will be a tree of objects whose classes all inherit from :class:`ast.AST`. An abstract syntax tree can be compiled into a Python code object using the built-in :func:`compile` function."
msgstr ""
#: library/ast.rst:33
msgid "Abstract Grammar"
msgstr ""
#: library/ast.rst:35
msgid "The abstract grammar is currently defined as follows:"
msgstr ""
#: library/ast.rst:37
msgid "-- ASDL's 4 builtin types are:\n"
"-- identifier, int, string, constant\n"
"\n"
"module Python\n"
"{\n"
" mod = Module(stmt* body, type_ignore* type_ignores)\n"
" | Interactive(stmt* body)\n"
" | Expression(expr body)\n"
" | FunctionType(expr* argtypes, expr returns)\n"
"\n"
" stmt = FunctionDef(identifier name, arguments args,\n"
" stmt* body, expr* decorator_list, expr? returns,\n"
" string? type_comment, type_param* type_params)\n"
" | AsyncFunctionDef(identifier name, arguments args,\n"
" stmt* body, expr* decorator_list, expr? returns,\n"
" string? type_comment, type_param* type_params)\n"
"\n"
" | ClassDef(identifier name,\n"
" expr* bases,\n"
" keyword* keywords,\n"
" stmt* body,\n"
" expr* decorator_list,\n"
" type_param* type_params)\n"
" | Return(expr? value)\n"
"\n"
" | Delete(expr* targets)\n"
" | Assign(expr* targets, expr value, string? type_comment)\n"
" | TypeAlias(expr name, type_param* type_params, expr value)\n"
" | AugAssign(expr target, operator op, expr value)\n"
" -- 'simple' indicates that we annotate simple name without parens\n"
" | AnnAssign(expr target, expr annotation, expr? value, int simple)\n"
"\n"
" -- use 'orelse' because else is a keyword in target languages\n"
" | For(expr target, expr iter, stmt* body, stmt* orelse, string? type_comment)\n"
" | AsyncFor(expr target, expr iter, stmt* body, stmt* orelse, string? type_comment)\n"
" | While(expr test, stmt* body, stmt* orelse)\n"
" | If(expr test, stmt* body, stmt* orelse)\n"
" | With(withitem* items, stmt* body, string? type_comment)\n"
" | AsyncWith(withitem* items, stmt* body, string? type_comment)\n"
"\n"
" | Match(expr subject, match_case* cases)\n"
"\n"
" | Raise(expr? exc, expr? cause)\n"
" | Try(stmt* body, excepthandler* handlers, stmt* orelse, stmt* finalbody)\n"
" | TryStar(stmt* body, excepthandler* handlers, stmt* orelse, stmt* finalbody)\n"
" | Assert(expr test, expr? msg)\n"
"\n"
" | Import(alias* names)\n"
" | ImportFrom(identifier? module, alias* names, int? level)\n"
"\n"
" | Global(identifier* names)\n"
" | Nonlocal(identifier* names)\n"
" | Expr(expr value)\n"
" | Pass | Break | Continue\n"
"\n"
" -- col_offset is the byte offset in the utf8 string the parser uses\n"
" attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)\n"
"\n"
" -- BoolOp() can use left & right?\n"
" expr = BoolOp(boolop op, expr* values)\n"
" | NamedExpr(expr target, expr value)\n"
" | BinOp(expr left, operator op, expr right)\n"
" | UnaryOp(unaryop op, expr operand)\n"
" | Lambda(arguments args, expr body)\n"
" | IfExp(expr test, expr body, expr orelse)\n"
" | Dict(expr* keys, expr* values)\n"
" | Set(expr* elts)\n"
" | ListComp(expr elt, comprehension* generators)\n"
" | SetComp(expr elt, comprehension* generators)\n"
" | DictComp(expr key, expr value, comprehension* generators)\n"
" | GeneratorExp(expr elt, comprehension* generators)\n"
" -- the grammar constrains where yield expressions can occur\n"
" | Await(expr value)\n"
" | Yield(expr? value)\n"
" | YieldFrom(expr value)\n"
" -- need sequences for compare to distinguish between\n"
" -- x < 4 < 3 and (x < 4) < 3\n"
" | Compare(expr left, cmpop* ops, expr* comparators)\n"
" | Call(expr func, expr* args, keyword* keywords)\n"
" | FormattedValue(expr value, int conversion, expr? format_spec)\n"
" | JoinedStr(expr* values)\n"
" | Constant(constant value, string? kind)\n"
"\n"
" -- the following expression can appear in assignment context\n"
" | Attribute(expr value, identifier attr, expr_context ctx)\n"
" | Subscript(expr value, expr slice, expr_context ctx)\n"
" | Starred(expr value, expr_context ctx)\n"
" | Name(identifier id, expr_context ctx)\n"
" | List(expr* elts, expr_context ctx)\n"
" | Tuple(expr* elts, expr_context ctx)\n"
"\n"
" -- can appear only in Subscript\n"
" | Slice(expr? lower, expr? upper, expr? step)\n"
"\n"
" -- col_offset is the byte offset in the utf8 string the parser uses\n"
" attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)\n"
"\n"
" expr_context = Load | Store | Del\n"
"\n"
" boolop = And | Or\n"
"\n"
" operator = Add | Sub | Mult | MatMult | Div | Mod | Pow | LShift\n"
" | RShift | BitOr | BitXor | BitAnd | FloorDiv\n"
"\n"
" unaryop = Invert | Not | UAdd | USub\n"
"\n"
" cmpop = Eq | NotEq | Lt | LtE | Gt | GtE | Is | IsNot | In | NotIn\n"
"\n"
" comprehension = (expr target, expr iter, expr* ifs, int is_async)\n"
"\n"
" excepthandler = ExceptHandler(expr? type, identifier? name, stmt* body)\n"
" attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)\n"
"\n"
" arguments = (arg* posonlyargs, arg* args, arg? vararg, arg* kwonlyargs,\n"
" expr* kw_defaults, arg? kwarg, expr* defaults)\n"
"\n"
" arg = (identifier arg, expr? annotation, string? type_comment)\n"
" attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)\n"
"\n"
" -- keyword arguments supplied to call (NULL identifier for **kwargs)\n"
" keyword = (identifier? arg, expr value)\n"
" attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)\n"
"\n"
" -- import name with optional 'as' alias.\n"
" alias = (identifier name, identifier? asname)\n"
" attributes (int lineno, int col_offset, int? end_lineno, int? end_col_offset)\n"
"\n"
" withitem = (expr context_expr, expr? optional_vars)\n"
"\n"
" match_case = (pattern pattern, expr? guard, stmt* body)\n"
"\n"
" pattern = MatchValue(expr value)\n"
" | MatchSingleton(constant value)\n"
" | MatchSequence(pattern* patterns)\n"
" | MatchMapping(expr* keys, pattern* patterns, identifier? rest)\n"
" | MatchClass(expr cls, pattern* patterns, identifier* kwd_attrs, pattern* kwd_patterns)\n"
"\n"
" | MatchStar(identifier? name)\n"
" -- The optional \"rest\" MatchMapping parameter handles capturing extra mapping keys\n"
"\n"
" | MatchAs(pattern? pattern, identifier? name)\n"
" | MatchOr(pattern* patterns)\n"
"\n"
" attributes (int lineno, int col_offset, int end_lineno, int end_col_offset)\n"
"\n"
" type_ignore = TypeIgnore(int lineno, string tag)\n"
"\n"
" type_param = TypeVar(identifier name, expr? bound, expr? default_value)\n"
" | ParamSpec(identifier name, expr? default_value)\n"
" | TypeVarTuple(identifier name, expr? default_value)\n"
" attributes (int lineno, int col_offset, int end_lineno, int end_col_offset)\n"
"}\n"
""
msgstr ""
#: library/ast.rst:42
msgid "Node classes"
msgstr ""
#: library/ast.rst:46
msgid "This is the base of all AST node classes. The actual node classes are derived from the :file:`Parser/Python.asdl` file, which is reproduced :ref:`above <abstract-grammar>`. They are defined in the :mod:`!_ast` C module and re-exported in :mod:`ast`."
msgstr ""
#: library/ast.rst:51
msgid "There is one class defined for each left-hand side symbol in the abstract grammar (for example, :class:`ast.stmt` or :class:`ast.expr`). In addition, there is one class defined for each constructor on the right-hand side; these classes inherit from the classes for the left-hand side trees. For example, :class:`ast.BinOp` inherits from :class:`ast.expr`. For production rules with alternatives (aka \"sums\"), the left-hand side class is abstract: only instances of specific constructor nodes are ever created."
msgstr ""
#: library/ast.rst:64
msgid "Each concrete class has an attribute :attr:`!_fields` which gives the names of all child nodes."
msgstr ""
#: library/ast.rst:67
msgid "Each instance of a concrete class has one attribute for each child node, of the type as defined in the grammar. For example, :class:`ast.BinOp` instances have an attribute :attr:`left` of type :class:`ast.expr`."
msgstr ""
#: library/ast.rst:71
msgid "If these attributes are marked as optional in the grammar (using a question mark), the value might be ``None``. If the attributes can have zero-or-more values (marked with an asterisk), the values are represented as Python lists. All possible attributes must be present and have valid values when compiling an AST with :func:`compile`."
msgstr ""
#: library/ast.rst:79
msgid "The :attr:`!_field_types` attribute on each concrete class is a dictionary mapping field names (as also listed in :attr:`_fields`) to their types."
msgstr ""
#: library/ast.rst:82
msgid ">>> ast.TypeVar._field_types\n"
"{'name': <class 'str'>, 'bound': ast.expr | None, 'default_value': ast.expr | None}"
msgstr ""
#: library/ast.rst:94
msgid "Instances of :class:`ast.expr` and :class:`ast.stmt` subclasses have :attr:`lineno`, :attr:`col_offset`, :attr:`end_lineno`, and :attr:`end_col_offset` attributes. The :attr:`lineno` and :attr:`end_lineno` are the first and last line numbers of source text span (1-indexed so the first line is line 1) and the :attr:`col_offset` and :attr:`end_col_offset` are the corresponding UTF-8 byte offsets of the first and last tokens that generated the node. The UTF-8 offset is recorded because the parser uses UTF-8 internally."
msgstr ""
#: library/ast.rst:103
msgid "Note that the end positions are not required by the compiler and are therefore optional. The end offset is *after* the last symbol, for example one can get the source segment of a one-line expression node using ``source_line[node.col_offset : node.end_col_offset]``."
msgstr ""
#: library/ast.rst:108
msgid "The constructor of a class :class:`ast.T` parses its arguments as follows:"
msgstr ""
#: library/ast.rst:110
msgid "If there are positional arguments, there must be as many as there are items in :attr:`T._fields`; they will be assigned as attributes of these names."
msgstr ""
#: library/ast.rst:112
msgid "If there are keyword arguments, they will set the attributes of the same names to the given values."
msgstr ""
#: library/ast.rst:115
msgid "For example, to create and populate an :class:`ast.UnaryOp` node, you could use ::"
msgstr ""
#: library/ast.rst:118
msgid "node = ast.UnaryOp(ast.USub(), ast.Constant(5, lineno=0, col_offset=0),\n"
" lineno=0, col_offset=0)"
msgstr ""
#: library/ast.rst:121
msgid "If a field that is optional in the grammar is omitted from the constructor, it defaults to ``None``. If a list field is omitted, it defaults to the empty list. If a field of type :class:`!ast.expr_context` is omitted, it defaults to :class:`Load() <ast.Load>`. If any other field is omitted, a :exc:`DeprecationWarning` is raised and the AST node will not have this field. In Python 3.15, this condition will raise an error."
msgstr ""
#: library/ast.rst:130
msgid "Class :class:`ast.Constant` is now used for all constants."
msgstr ""
#: library/ast.rst:134
msgid "Simple indices are represented by their value, extended slices are represented as tuples."
msgstr ""
#: library/ast.rst:139
msgid "Old classes :class:`!ast.Num`, :class:`!ast.Str`, :class:`!ast.Bytes`, :class:`!ast.NameConstant` and :class:`!ast.Ellipsis` are still available, but they will be removed in future Python releases. In the meantime, instantiating them will return an instance of a different class."
msgstr ""
#: library/ast.rst:146
msgid "Old classes :class:`!ast.Index` and :class:`!ast.ExtSlice` are still available, but they will be removed in future Python releases. In the meantime, instantiating them will return an instance of a different class."
msgstr ""
#: library/ast.rst:153
msgid "Previous versions of Python allowed the creation of AST nodes that were missing required fields. Similarly, AST node constructors allowed arbitrary keyword arguments that were set as attributes of the AST node, even if they did not match any of the fields of the AST node. This behavior is deprecated and will be removed in Python 3.15."
msgstr ""
#: library/ast.rst:160
msgid "The descriptions of the specific node classes displayed here were initially adapted from the fantastic `Green Tree Snakes <https://greentreesnakes.readthedocs.io/en/latest/>`__ project and all its contributors."
msgstr ""
#: library/ast.rst:169
msgid "Root nodes"
msgstr ""
#: library/ast.rst:173
msgid "A Python module, as with :ref:`file input <file-input>`. Node type generated by :func:`ast.parse` in the default ``\"exec\"`` *mode*."
msgstr ""
#: library/ast.rst:176
msgid "``body`` is a :class:`list` of the module's :ref:`ast-statements`."
msgstr ""
#: library/ast.rst:178
msgid "``type_ignores`` is a :class:`list` of the module's type ignore comments; see :func:`ast.parse` for more details."
msgstr ""
#: library/ast.rst:181
msgid ">>> print(ast.dump(ast.parse('x = 1'), indent=4))\n"
"Module(\n"
" body=[\n"
" Assign(\n"
" targets=[\n"
" Name(id='x', ctx=Store())],\n"
" value=Constant(value=1))])"
msgstr ""
#: library/ast.rst:194
msgid "A single Python :ref:`expression input <expression-input>`. Node type generated by :func:`ast.parse` when *mode* is ``\"eval\"``."
msgstr ""
#: library/ast.rst:197
msgid "``body`` is a single node, one of the :ref:`expression types <ast-expressions>`."
msgstr ""
#: library/ast.rst:200
#: library/ast.rst:270
msgid ">>> print(ast.dump(ast.parse('123', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Constant(value=123))"
msgstr ""
#: library/ast.rst:209
msgid "A single :ref:`interactive input <interactive>`, like in :ref:`tut-interac`. Node type generated by :func:`ast.parse` when *mode* is ``\"single\"``."
msgstr ""
#: library/ast.rst:212
msgid "``body`` is a :class:`list` of :ref:`statement nodes <ast-statements>`."
msgstr ""
#: library/ast.rst:214
msgid ">>> print(ast.dump(ast.parse('x = 1; y = 2', mode='single'), indent=4))\n"
"Interactive(\n"
" body=[\n"
" Assign(\n"
" targets=[\n"
" Name(id='x', ctx=Store())],\n"
" value=Constant(value=1)),\n"
" Assign(\n"
" targets=[\n"
" Name(id='y', ctx=Store())],\n"
" value=Constant(value=2))])"
msgstr ""
#: library/ast.rst:231
msgid "A representation of an old-style type comments for functions, as Python versions prior to 3.5 didn't support :pep:`484` annotations. Node type generated by :func:`ast.parse` when *mode* is ``\"func_type\"``."
msgstr ""
#: library/ast.rst:235
msgid "Such type comments would look like this::"
msgstr ""
#: library/ast.rst:237
msgid "def sum_two_number(a, b):\n"
" # type: (int, int) -> int\n"
" return a + b"
msgstr ""
#: library/ast.rst:241
msgid "``argtypes`` is a :class:`list` of :ref:`expression nodes <ast-expressions>`."
msgstr ""
#: library/ast.rst:243
msgid "``returns`` is a single :ref:`expression node <ast-expressions>`."
msgstr ""
#: library/ast.rst:245
msgid ">>> print(ast.dump(ast.parse('(int, str) -> List[int]', mode='func_type'), indent=4))\n"
"FunctionType(\n"
" argtypes=[\n"
" Name(id='int', ctx=Load()),\n"
" Name(id='str', ctx=Load())],\n"
" returns=Subscript(\n"
" value=Name(id='List', ctx=Load()),\n"
" slice=Name(id='int', ctx=Load()),\n"
" ctx=Load()))"
msgstr ""
#: library/ast.rst:261
msgid "Literals"
msgstr ""
#: library/ast.rst:265
msgid "A constant value. The ``value`` attribute of the ``Constant`` literal contains the Python object it represents. The values represented can be simple types such as a number, string or ``None``, but also immutable container types (tuples and frozensets) if all of their elements are constant."
msgstr ""
#: library/ast.rst:279
msgid "Node representing a single formatting field in an f-string. If the string contains a single formatting field and nothing else the node can be isolated otherwise it appears in :class:`JoinedStr`."
msgstr ""
#: library/ast.rst:283
msgid "``value`` is any expression node (such as a literal, a variable, or a function call)."
msgstr ""
#: library/ast.rst:285
msgid "``conversion`` is an integer:"
msgstr ""
#: library/ast.rst:287
msgid "-1: no formatting"
msgstr ""
#: library/ast.rst:288
msgid "115: ``!s`` string formatting"
msgstr ""
#: library/ast.rst:289
msgid "114: ``!r`` repr formatting"
msgstr ""
#: library/ast.rst:290
msgid "97: ``!a`` ascii formatting"
msgstr ""
#: library/ast.rst:292
msgid "``format_spec`` is a :class:`JoinedStr` node representing the formatting of the value, or ``None`` if no format was specified. Both ``conversion`` and ``format_spec`` can be set at the same time."
msgstr ""
#: library/ast.rst:299
msgid "An f-string, comprising a series of :class:`FormattedValue` and :class:`Constant` nodes."
msgstr ""
#: library/ast.rst:302
msgid ">>> print(ast.dump(ast.parse('f\"sin({a}) is {sin(a):.3}\"', mode='eval'), indent=4))\n"
"Expression(\n"
" body=JoinedStr(\n"
" values=[\n"
" Constant(value='sin('),\n"
" FormattedValue(\n"
" value=Name(id='a', ctx=Load()),\n"
" conversion=-1),\n"
" Constant(value=') is '),\n"
" FormattedValue(\n"
" value=Call(\n"
" func=Name(id='sin', ctx=Load()),\n"
" args=[\n"
" Name(id='a', ctx=Load())]),\n"
" conversion=-1,\n"
" format_spec=JoinedStr(\n"
" values=[\n"
" Constant(value='.3')]))]))"
msgstr ""
#: library/ast.rst:327
msgid "A list or tuple. ``elts`` holds a list of nodes representing the elements. ``ctx`` is :class:`Store` if the container is an assignment target (i.e. ``(x,y)=something``), and :class:`Load` otherwise."
msgstr ""
#: library/ast.rst:331
msgid ">>> print(ast.dump(ast.parse('[1, 2, 3]', mode='eval'), indent=4))\n"
"Expression(\n"
" body=List(\n"
" elts=[\n"
" Constant(value=1),\n"
" Constant(value=2),\n"
" Constant(value=3)],\n"
" ctx=Load()))\n"
">>> print(ast.dump(ast.parse('(1, 2, 3)', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Tuple(\n"
" elts=[\n"
" Constant(value=1),\n"
" Constant(value=2),\n"
" Constant(value=3)],\n"
" ctx=Load()))"
msgstr ""
#: library/ast.rst:353
msgid "A set. ``elts`` holds a list of nodes representing the set's elements."
msgstr ""
#: library/ast.rst:355
msgid ">>> print(ast.dump(ast.parse('{1, 2, 3}', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Set(\n"
" elts=[\n"
" Constant(value=1),\n"
" Constant(value=2),\n"
" Constant(value=3)]))"
msgstr ""
#: library/ast.rst:368
msgid "A dictionary. ``keys`` and ``values`` hold lists of nodes representing the keys and the values respectively, in matching order (what would be returned when calling :code:`dictionary.keys()` and :code:`dictionary.values()`)."
msgstr ""
#: library/ast.rst:372
msgid "When doing dictionary unpacking using dictionary literals the expression to be expanded goes in the ``values`` list, with a ``None`` at the corresponding position in ``keys``."
msgstr ""
#: library/ast.rst:376
msgid ">>> print(ast.dump(ast.parse('{\"a\":1, **d}', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Dict(\n"
" keys=[\n"
" Constant(value='a'),\n"
" None],\n"
" values=[\n"
" Constant(value=1),\n"
" Name(id='d', ctx=Load())]))"
msgstr ""
#: library/ast.rst:390
msgid "Variables"
msgstr ""
#: library/ast.rst:394
msgid "A variable name. ``id`` holds the name as a string, and ``ctx`` is one of the following types."
msgstr ""
#: library/ast.rst:402
msgid "Variable references can be used to load the value of a variable, to assign a new value to it, or to delete it. Variable references are given a context to distinguish these cases."
msgstr ""
#: library/ast.rst:406
msgid ">>> print(ast.dump(ast.parse('a'), indent=4))\n"
"Module(\n"
" body=[\n"
" Expr(\n"
" value=Name(id='a', ctx=Load()))])\n"
"\n"
">>> print(ast.dump(ast.parse('a = 1'), indent=4))\n"
"Module(\n"
" body=[\n"
" Assign(\n"
" targets=[\n"
" Name(id='a', ctx=Store())],\n"
" value=Constant(value=1))])\n"
"\n"
">>> print(ast.dump(ast.parse('del a'), indent=4))\n"
"Module(\n"
" body=[\n"
" Delete(\n"
" targets=[\n"
" Name(id='a', ctx=Del())])])"
msgstr ""
#: library/ast.rst:432
msgid "A ``*var`` variable reference. ``value`` holds the variable, typically a :class:`Name` node. This type must be used when building a :class:`Call` node with ``*args``."
msgstr ""
#: library/ast.rst:436
msgid ">>> print(ast.dump(ast.parse('a, *b = it'), indent=4))\n"
"Module(\n"
" body=[\n"
" Assign(\n"
" targets=[\n"
" Tuple(\n"
" elts=[\n"
" Name(id='a', ctx=Store()),\n"
" Starred(\n"
" value=Name(id='b', ctx=Store()),\n"
" ctx=Store())],\n"
" ctx=Store())],\n"
" value=Name(id='it', ctx=Load()))])"
msgstr ""
#: library/ast.rst:456
msgid "Expressions"
msgstr ""
#: library/ast.rst:460
msgid "When an expression, such as a function call, appears as a statement by itself with its return value not used or stored, it is wrapped in this container. ``value`` holds one of the other nodes in this section, a :class:`Constant`, a :class:`Name`, a :class:`Lambda`, a :class:`Yield` or :class:`YieldFrom` node."
msgstr ""
#: library/ast.rst:465
msgid ">>> print(ast.dump(ast.parse('-a'), indent=4))\n"
"Module(\n"
" body=[\n"
" Expr(\n"
" value=UnaryOp(\n"
" op=USub(),\n"
" operand=Name(id='a', ctx=Load())))])"
msgstr ""
#: library/ast.rst:478
msgid "A unary operation. ``op`` is the operator, and ``operand`` any expression node."
msgstr ""
#: library/ast.rst:487
msgid "Unary operator tokens. :class:`Not` is the ``not`` keyword, :class:`Invert` is the ``~`` operator."
msgstr ""
#: library/ast.rst:490
msgid ">>> print(ast.dump(ast.parse('not x', mode='eval'), indent=4))\n"
"Expression(\n"
" body=UnaryOp(\n"
" op=Not(),\n"
" operand=Name(id='x', ctx=Load())))"
msgstr ""
#: library/ast.rst:501
msgid "A binary operation (like addition or division). ``op`` is the operator, and ``left`` and ``right`` are any expression nodes."
msgstr ""
#: library/ast.rst:504
msgid ">>> print(ast.dump(ast.parse('x + y', mode='eval'), indent=4))\n"
"Expression(\n"
" body=BinOp(\n"
" left=Name(id='x', ctx=Load()),\n"
" op=Add(),\n"
" right=Name(id='y', ctx=Load())))"
msgstr ""
#: library/ast.rst:528
msgid "Binary operator tokens."
msgstr ""
#: library/ast.rst:533
msgid "A boolean operation, 'or' or 'and'. ``op`` is :class:`Or` or :class:`And`. ``values`` are the values involved. Consecutive operations with the same operator, such as ``a or b or c``, are collapsed into one node with several values."
msgstr ""
#: library/ast.rst:538
msgid "This doesn't include ``not``, which is a :class:`UnaryOp`."
msgstr ""
#: library/ast.rst:540
msgid ">>> print(ast.dump(ast.parse('x or y', mode='eval'), indent=4))\n"
"Expression(\n"
" body=BoolOp(\n"
" op=Or(),\n"
" values=[\n"
" Name(id='x', ctx=Load()),\n"
" Name(id='y', ctx=Load())]))"
msgstr ""
#: library/ast.rst:554
msgid "Boolean operator tokens."
msgstr ""
#: library/ast.rst:559
msgid "A comparison of two or more values. ``left`` is the first value in the comparison, ``ops`` the list of operators, and ``comparators`` the list of values after the first element in the comparison."
msgstr ""
#: library/ast.rst:563
msgid ">>> print(ast.dump(ast.parse('1 <= a < 10', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Compare(\n"
" left=Constant(value=1),\n"
" ops=[\n"
" LtE(),\n"
" Lt()],\n"
" comparators=[\n"
" Name(id='a', ctx=Load()),\n"
" Constant(value=10)]))"
msgstr ""
#: library/ast.rst:588
msgid "Comparison operator tokens."
msgstr ""
#: library/ast.rst:593
msgid "A function call. ``func`` is the function, which will often be a :class:`Name` or :class:`Attribute` object. Of the arguments:"
msgstr ""
#: library/ast.rst:596
msgid "``args`` holds a list of the arguments passed by position."
msgstr ""
#: library/ast.rst:597
msgid "``keywords`` holds a list of :class:`.keyword` objects representing arguments passed by keyword."
msgstr ""
#: library/ast.rst:600
msgid "The ``args`` and ``keywords`` arguments are optional and default to empty lists."
msgstr ""
#: library/ast.rst:602
msgid ">>> print(ast.dump(ast.parse('func(a, b=c, *d, **e)', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Call(\n"
" func=Name(id='func', ctx=Load()),\n"
" args=[\n"
" Name(id='a', ctx=Load()),\n"
" Starred(\n"
" value=Name(id='d', ctx=Load()),\n"
" ctx=Load())],\n"
" keywords=[\n"
" keyword(\n"
" arg='b',\n"
" value=Name(id='c', ctx=Load())),\n"
" keyword(\n"
" value=Name(id='e', ctx=Load()))]))"
msgstr ""
#: library/ast.rst:623
msgid "A keyword argument to a function call or class definition. ``arg`` is a raw string of the parameter name, ``value`` is a node to pass in."
msgstr ""
#: library/ast.rst:629
msgid "An expression such as ``a if b else c``. Each field holds a single node, so in the following example, all three are :class:`Name` nodes."
msgstr ""
#: library/ast.rst:632
msgid ">>> print(ast.dump(ast.parse('a if b else c', mode='eval'), indent=4))\n"
"Expression(\n"
" body=IfExp(\n"
" test=Name(id='b', ctx=Load()),\n"
" body=Name(id='a', ctx=Load()),\n"
" orelse=Name(id='c', ctx=Load())))"
msgstr ""
#: library/ast.rst:644
msgid "Attribute access, e.g. ``d.keys``. ``value`` is a node, typically a :class:`Name`. ``attr`` is a bare string giving the name of the attribute, and ``ctx`` is :class:`Load`, :class:`Store` or :class:`Del` according to how the attribute is acted on."
msgstr ""
#: library/ast.rst:649
msgid ">>> print(ast.dump(ast.parse('snake.colour', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Attribute(\n"
" value=Name(id='snake', ctx=Load()),\n"
" attr='colour',\n"
" ctx=Load()))"
msgstr ""
#: library/ast.rst:661
msgid "A named expression. This AST node is produced by the assignment expressions operator (also known as the walrus operator). As opposed to the :class:`Assign` node in which the first argument can be multiple nodes, in this case both ``target`` and ``value`` must be single nodes."
msgstr ""
#: library/ast.rst:666
msgid ">>> print(ast.dump(ast.parse('(x := 4)', mode='eval'), indent=4))\n"
"Expression(\n"
" body=NamedExpr(\n"
" target=Name(id='x', ctx=Store()),\n"
" value=Constant(value=4)))"
msgstr ""
#: library/ast.rst:677
msgid "Subscripting"
msgstr ""
#: library/ast.rst:681
msgid "A subscript, such as ``l[1]``. ``value`` is the subscripted object (usually sequence or mapping). ``slice`` is an index, slice or key. It can be a :class:`Tuple` and contain a :class:`Slice`. ``ctx`` is :class:`Load`, :class:`Store` or :class:`Del` according to the action performed with the subscript."
msgstr ""
#: library/ast.rst:687
msgid ">>> print(ast.dump(ast.parse('l[1:2, 3]', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Subscript(\n"
" value=Name(id='l', ctx=Load()),\n"
" slice=Tuple(\n"
" elts=[\n"
" Slice(\n"
" lower=Constant(value=1),\n"
" upper=Constant(value=2)),\n"
" Constant(value=3)],\n"
" ctx=Load()),\n"
" ctx=Load()))"
msgstr ""
#: library/ast.rst:705
msgid "Regular slicing (on the form ``lower:upper`` or ``lower:upper:step``). Can occur only inside the *slice* field of :class:`Subscript`, either directly or as an element of :class:`Tuple`."
msgstr ""
#: library/ast.rst:709
msgid ">>> print(ast.dump(ast.parse('l[1:2]', mode='eval'), indent=4))\n"
"Expression(\n"
" body=Subscript(\n"
" value=Name(id='l', ctx=Load()),\n"
" slice=Slice(\n"
" lower=Constant(value=1),\n"
" upper=Constant(value=2)),\n"
" ctx=Load()))"
msgstr ""
#: library/ast.rst:722
msgid "Comprehensions"
msgstr ""
#: library/ast.rst:729
msgid "List and set comprehensions, generator expressions, and dictionary comprehensions. ``elt`` (or ``key`` and ``value``) is a single node representing the part that will be evaluated for each item."
msgstr ""
#: library/ast.rst:733
msgid "``generators`` is a list of :class:`comprehension` nodes."
msgstr ""
#: library/ast.rst:735
msgid ">>> print(ast.dump(\n"
"... ast.parse('[x for x in numbers]', mode='eval'),\n"
"... indent=4,\n"
"... ))\n"
"Expression(\n"
" body=ListComp(\n"
" elt=Name(id='x', ctx=Load()),\n"
" generators=[\n"
" comprehension(\n"
" target=Name(id='x', ctx=Store()),\n"
" iter=Name(id='numbers', ctx=Load()),\n"
" is_async=0)]))\n"
">>> print(ast.dump(\n"
"... ast.parse('{x: x**2 for x in numbers}', mode='eval'),\n"
"... indent=4,\n"
"... ))\n"
"Expression(\n"
" body=DictComp(\n"
" key=Name(id='x', ctx=Load()),\n"
" value=BinOp(\n"
" left=Name(id='x', ctx=Load()),\n"
" op=Pow(),\n"
" right=Constant(value=2)),\n"
" generators=[\n"
" comprehension(\n"
" target=Name(id='x', ctx=Store()),\n"
" iter=Name(id='numbers', ctx=Load()),\n"
" is_async=0)]))\n"
">>> print(ast.dump(\n"
"... ast.parse('{x for x in numbers}', mode='eval'),\n"
"... indent=4,\n"
"... ))\n"
"Expression(\n"
" body=SetComp(\n"
" elt=Name(id='x', ctx=Load()),\n"
" generators=[\n"
" comprehension(\n"
" target=Name(id='x', ctx=Store()),\n"
" iter=Name(id='numbers', ctx=Load()),\n"
" is_async=0)]))"
msgstr ""
#: library/ast.rst:781
msgid "One ``for`` clause in a comprehension. ``target`` is the reference to use for each element - typically a :class:`Name` or :class:`Tuple` node. ``iter`` is the object to iterate over. ``ifs`` is a list of test expressions: each ``for`` clause can have multiple ``ifs``."
msgstr ""
#: library/ast.rst:786
msgid "``is_async`` indicates a comprehension is asynchronous (using an ``async for`` instead of ``for``). The value is an integer (0 or 1)."
msgstr ""
#: library/ast.rst:789
msgid ">>> print(ast.dump(ast.parse('[ord(c) for line in file for c in line]', mode='eval'),\n"
"... indent=4)) # Multiple comprehensions in one.\n"
"Expression(\n"
" body=ListComp(\n"
" elt=Call(\n"
" func=Name(id='ord', ctx=Load()),\n"
" args=[\n"
" Name(id='c', ctx=Load())]),\n"
" generators=[\n"
" comprehension(\n"
" target=Name(id='line', ctx=Store()),\n"
" iter=Name(id='file', ctx=Load()),\n"
" is_async=0),\n"
" comprehension(\n"
" target=Name(id='c', ctx=Store()),\n"
" iter=Name(id='line', ctx=Load()),\n"
" is_async=0)]))\n"
"\n"
">>> print(ast.dump(ast.parse('(n**2 for n in it if n>5 if n<10)', mode='eval'),\n"
"... indent=4)) # generator comprehension\n"
"Expression(\n"
" body=GeneratorExp(\n"
" elt=BinOp(\n"
" left=Name(id='n', ctx=Load()),\n"
" op=Pow(),\n"
" right=Constant(value=2)),\n"
" generators=[\n"
" comprehension(\n"
" target=Name(id='n', ctx=Store()),\n"
" iter=Name(id='it', ctx=Load()),\n"
" ifs=[\n"
" Compare(\n"
" left=Name(id='n', ctx=Load()),\n"
" ops=[\n"
" Gt()],\n"
" comparators=[\n"
" Constant(value=5)]),\n"
" Compare(\n"
" left=Name(id='n', ctx=Load()),\n"
" ops=[\n"
" Lt()],\n"
" comparators=[\n"
" Constant(value=10)])],\n"
" is_async=0)]))\n"
"\n"
">>> print(ast.dump(ast.parse('[i async for i in soc]', mode='eval'),\n"
"... indent=4)) # Async comprehension\n"
"Expression(\n"
" body=ListComp(\n"
" elt=Name(id='i', ctx=Load()),\n"
" generators=[\n"
" comprehension(\n"
" target=Name(id='i', ctx=Store()),\n"
" iter=Name(id='soc', ctx=Load()),\n"
" is_async=1)]))"
msgstr ""
#: library/ast.rst:851
msgid "Statements"
msgstr ""
#: library/ast.rst:855
msgid "An assignment. ``targets`` is a list of nodes, and ``value`` is a single node."
msgstr ""
#: library/ast.rst:857
msgid "Multiple nodes in ``targets`` represents assigning the same value to each. Unpacking is represented by putting a :class:`Tuple` or :class:`List` within ``targets``."
msgstr ""
#: library/ast.rst:863
#: library/ast.rst:1158
#: library/ast.rst:1352
#: library/ast.rst:1881
msgid "``type_comment`` is an optional string with the type annotation as a comment."
msgstr ""
#: library/ast.rst:865
msgid ">>> print(ast.dump(ast.parse('a = b = 1'), indent=4)) # Multiple assignment\n"
"Module(\n"
" body=[\n"
" Assign(\n"
" targets=[\n"
" Name(id='a', ctx=Store()),\n"
" Name(id='b', ctx=Store())],\n"
" value=Constant(value=1))])\n"
"\n"
">>> print(ast.dump(ast.parse('a,b = c'), indent=4)) # Unpacking\n"
"Module(\n"
" body=[\n"
" Assign(\n"
" targets=[\n"
" Tuple(\n"
" elts=[\n"
" Name(id='a', ctx=Store()),\n"
" Name(id='b', ctx=Store())],\n"
" ctx=Store())],\n"
" value=Name(id='c', ctx=Load()))])"
msgstr ""
#: library/ast.rst:891
msgid "An assignment with a type annotation. ``target`` is a single node and can be a :class:`Name`, an :class:`Attribute` or a :class:`Subscript`. ``annotation`` is the annotation, such as a :class:`Constant` or :class:`Name` node. ``value`` is a single optional node."
msgstr ""
#: library/ast.rst:896
msgid "``simple`` is always either 0 (indicating a \"complex\" target) or 1 (indicating a \"simple\" target). A \"simple\" target consists solely of a :class:`Name` node that does not appear between parentheses; all other targets are considered complex. Only simple targets appear in the :attr:`~object.__annotations__` dictionary of modules and classes."
msgstr ""
#: library/ast.rst:902
msgid ">>> print(ast.dump(ast.parse('c: int'), indent=4))\n"
"Module(\n"
" body=[\n"
" AnnAssign(\n"
" target=Name(id='c', ctx=Store()),\n"
" annotation=Name(id='int', ctx=Load()),\n"
" simple=1)])\n"
"\n"
">>> print(ast.dump(ast.parse('(a): int = 1'), indent=4)) # Annotation with parenthesis\n"
"Module(\n"
" body=[\n"
" AnnAssign(\n"
" target=Name(id='a', ctx=Store()),\n"
" annotation=Name(id='int', ctx=Load()),\n"
" value=Constant(value=1),\n"
" simple=0)])\n"
"\n"
">>> print(ast.dump(ast.parse('a.b: int'), indent=4)) # Attribute annotation\n"
"Module(\n"
" body=[\n"
" AnnAssign(\n"
" target=Attribute(\n"
" value=Name(id='a', ctx=Load()),\n"
" attr='b',\n"
" ctx=Store()),\n"
" annotation=Name(id='int', ctx=Load()),\n"
" simple=0)])\n"
"\n"
">>> print(ast.dump(ast.parse('a[1]: int'), indent=4)) # Subscript annotation\n"
"Module(\n"
" body=[\n"
" AnnAssign(\n"
" target=Subscript(\n"
" value=Name(id='a', ctx=Load()),\n"
" slice=Constant(value=1),\n"
" ctx=Store()),\n"
" annotation=Name(id='int', ctx=Load()),\n"
" simple=0)])"
msgstr ""
#: library/ast.rst:946
msgid "Augmented assignment, such as ``a += 1``. In the following example, ``target`` is a :class:`Name` node for ``x`` (with the :class:`Store` context), ``op`` is :class:`Add`, and ``value`` is a :class:`Constant` with value for 1."
msgstr ""
#: library/ast.rst:951
msgid "The ``target`` attribute cannot be of class :class:`Tuple` or :class:`List`, unlike the targets of :class:`Assign`."
msgstr ""
#: library/ast.rst:954
msgid ">>> print(ast.dump(ast.parse('x += 2'), indent=4))\n"
"Module(\n"
" body=[\n"
" AugAssign(\n"
" target=Name(id='x', ctx=Store()),\n"
" op=Add(),\n"
" value=Constant(value=2))])"
msgstr ""