viruPVS/langchain-docs huggingface dataset:
return False
        if cls in _const_types:
            try:
                value = inst.value
            except AttributeError:
                return False
            else:
                return (
                    isinstance(value, _const_types[cls]) and
                    not isinstance(value, _const_types_not.get(cls, ()))
                )
        return type.__instancecheck__(cls, inst)
def _new(cls, *args, **kwargs):
    for key in kwargs:
        if key not in cls._fields:
            # arbitrary keyword arguments are accepted
            continue
        pos = cls._fields.index(key)
        if pos < len(args):
            raise TypeError(f"{cls.__name__} got multiple values for argument {key!r}")
    if cls in _const_types:
        return Constant(*args, **kwargs)
    return Constant.__new__(cls, *args, **kwargs)
class Num(Constant, metaclass=_ABC):
    _fields = ('n',)
    __new__ = _new
class Str(Constant, metaclass=_ABC):
    _fields = ('s',)
    __new__ = _new
class Bytes(Constant, metaclass=_ABC):
    _fields = ('s',)
    __new__ = _new
class NameConstant(Constant, metaclass=_ABC):
    __new__ = _new
class Ellipsis(Constant, metaclass=_ABC):
    _fields = ()
    def __new__(cls, *args, **kwargs):
        if cls is Ellipsis:
            return Constant(..., *args, **kwargs)
        return Constant.__new__(cls, *args, **kwargs)
_const_types = {
    Num: (int, float, complex),
    Str: (str,),
    Bytes: (bytes,),
Str: (str,),
    Bytes: (bytes,),
    NameConstant: (type(None), bool),
    Ellipsis: (type(...),),
}
_const_types_not = {
    Num: (bool,),
}
_const_node_type_names = {
    bool: 'NameConstant',  # should be before int
    type(None): 'NameConstant',
    int: 'Num',
    float: 'Num',
    complex: 'Num',
    str: 'Str',
    bytes: 'Bytes',
    type(...): 'Ellipsis',
}
class slice(AST):
    """Deprecated AST node class."""
class Index(slice):
    """Deprecated AST node class. Use the index value directly instead."""
    def __new__(cls, value, **kwargs):
        return value
class ExtSlice(slice):
    """Deprecated AST node class. Use ast.Tuple instead."""
    def __new__(cls, dims=(), **kwargs):
        return Tuple(list(dims), Load(), **kwargs)
# If the ast module is loaded more than once, only add deprecated methods once
if not hasattr(Tuple, 'dims'):
    # The following code is for backward compatibility.
    # It will be removed in future.
    def _dims_getter(self):
        """Deprecated. Use elts instead."""
        return self.elts
    def _dims_setter(self, value):
        self.elts = value
    Tuple.dims = property(_dims_getter, _dims_setter)
class Suite(mod):
    """Deprecated AST node class.  Unused in Python 3."""
class AugLoad(expr_context):
    """Deprecated AST node class.  Unused in Python 3."""
class AugStore(expr_context):
    """Deprecated AST node class.  Unused in Python 3."""
"""Deprecated AST node class.  Unused in Python 3."""
class Param(expr_context):
    """Deprecated AST node class.  Unused in Python 3."""
# Large float and imaginary literals get turned into infinities in the AST.
# We unparse those infinities to INFSTR.
_INFSTR = "1e" + repr(sys.float_info.max_10_exp + 1)
@_simple_enum(IntEnum)
class _Precedence:
    """Precedence table that originated from python grammar."""
    NAMED_EXPR = auto()      # <target> := <expr1>
    TUPLE = auto()           # <expr1>, <expr2>
    YIELD = auto()           # 'yield', 'yield from'
    TEST = auto()            # 'if'-'else', 'lambda'
    OR = auto()              # 'or'
    AND = auto()             # 'and'
    NOT = auto()             # 'not'
    CMP = auto()             # '<', '>', '==', '>=', '<=', '!=',
                             # 'in', 'not in', 'is', 'is not'
    EXPR = auto()
    BOR = EXPR               # '|'
    BXOR = auto()            # '^'
    BAND = auto()            # '&'
    SHIFT = auto()           # '<<', '>>'
    ARITH = auto()           # '+', '-'
    TERM = auto()            # '*', '@', '/', '%', '//'
    FACTOR = auto()          # unary '+', '-', '~'
    POWER = auto()           # '**'
    AWAIT = auto()           # 'await'
    ATOM = auto()
    def next(self):
        try:
ATOM = auto()
    def next(self):
        try:
            return self.__class__(self + 1)
        except ValueError:
            return self
_SINGLE_QUOTES = ("'", '"')
_MULTI_QUOTES = ('"""', "'''")
_ALL_QUOTES = (*_SINGLE_QUOTES, *_MULTI_QUOTES)
class _Unparser(NodeVisitor):
    """Methods in this class recursively traverse an AST and
    output source code for the abstract syntax; original formatting
    is disregarded."""
    def __init__(self, *, _avoid_backslashes=False):
        self._source = []
        self._precedences = {}
        self._type_ignores = {}
        self._indent = 0
        self._avoid_backslashes = _avoid_backslashes
        self._in_try_star = False
    def interleave(self, inter, f, seq):
        """Call f on each item in seq, calling inter() in between."""
        seq = iter(seq)
        try:
            f(next(seq))
        except StopIteration:
            pass
        else:
            for x in seq:
                inter()
                f(x)
    def items_view(self, traverser, items):
        """Traverse and separate the given *items* with a comma and append it to
        the buffer. If *items* is a single item sequence, a trailing comma
        will be added."""
        if len(items) == 1:
            traverser(items[0])
            self.write(",")
        else:
            self.interleave(lambda: self.write(", "), traverser, items)
    def maybe_newline(self):
        """Adds a newline if it isn't the start of generated source"""
        if self._source:
            self.write("\n")
    def fill(self, text=""):
self.write("\n")
    def fill(self, text=""):
        """Indent a piece of text and append it, according to the current
        indentation level"""
        self.maybe_newline()
        self.write("    " * self._indent + text)
    def write(self, *text):
        """Add new source parts"""
        self._source.extend(text)
    @contextmanager
    def buffered(self, buffer = None):
        if buffer is None:
            buffer = []
        original_source = self._source
        self._source = buffer
        yield buffer
        self._source = original_source
    @contextmanager
    def block(self, *, extra = None):
        """A context manager for preparing the source for blocks. It adds
        the character':', increases the indentation on enter and decreases
        the indentation on exit. If *extra* is given, it will be directly
        appended after the colon character.
        """
        self.write(":")
        if extra:
            self.write(extra)
        self._indent += 1
        yield
        self._indent -= 1
    @contextmanager
    def delimit(self, start, end):
        """A context manager for preparing the source for expressions. It adds
        *start* to the buffer and enters, after exit it adds *end*."""
        self.write(start)
        yield
        self.write(end)
    def delimit_if(self, start, end, condition):
        if condition:
            return self.delimit(start, end)
        else:
            return nullcontext()
    def require_parens(self, precedence, node):
        """Shortcut to adding precedence related parens"""
        return self.delimit_if("(", ")", self.get_precedence(node) > precedence)
def get_precedence(self, node):
        return self._precedences.get(node, _Precedence.TEST)
    def set_precedence(self, precedence, *nodes):
        for node in nodes:
            self._precedences[node] = precedence
    def get_raw_docstring(self, node):
        """If a docstring node is found in the body of the *node* parameter,
        return that docstring node, None otherwise.
        Logic mirrored from ``_PyAST_GetDocString``."""
        if not isinstance(
            node, (AsyncFunctionDef, FunctionDef, ClassDef, Module)
        ) or len(node.body) < 1:
            return None
        node = node.body[0]
        if not isinstance(node, Expr):
            return None
        node = node.value
        if isinstance(node, Constant) and isinstance(node.value, str):
            return node
    def get_type_comment(self, node):
        comment = self._type_ignores.get(node.lineno) or node.type_comment
        if comment is not None:
            return f" # type: {comment}"
    def traverse(self, node):
        if isinstance(node, list):
            for item in node:
                self.traverse(item)
        else:
            super().visit(node)
    # Note: as visit() resets the output text, do NOT rely on
    # NodeVisitor.generic_visit to handle any nodes (as it calls back in to
    # the subclass visit() method, which resets self._source to an empty list)
    def visit(self, node):
        """Outputs a source code string that, if converted back to an ast
        (using ast.parse) will generate an AST equivalent to *node*"""
        self._source = []
        self.traverse(node)
self._source = []
        self.traverse(node)
        return "".join(self._source)
    def _write_docstring_and_traverse_body(self, node):
        if (docstring := self.get_raw_docstring(node)):
            self._write_docstring(docstring)
            self.traverse(node.body[1:])
        else:
            self.traverse(node.body)
    def visit_Module(self, node):
        self._type_ignores = {
            ignore.lineno: f"ignore{ignore.tag}"
            for ignore in node.type_ignores
        }
        self._write_docstring_and_traverse_body(node)
        self._type_ignores.clear()
    def visit_FunctionType(self, node):
        with self.delimit("(", ")"):
            self.interleave(
                lambda: self.write(", "), self.traverse, node.argtypes
            )
        self.write(" -> ")
        self.traverse(node.returns)
    def visit_Expr(self, node):
        self.fill()
        self.set_precedence(_Precedence.YIELD, node.value)
        self.traverse(node.value)
    def visit_NamedExpr(self, node):
        with self.require_parens(_Precedence.NAMED_EXPR, node):
            self.set_precedence(_Precedence.ATOM, node.target, node.value)
            self.traverse(node.target)
            self.write(" := ")
            self.traverse(node.value)
    def visit_Import(self, node):
        self.fill("import ")
        self.interleave(lambda: self.write(", "), self.traverse, node.names)
    def visit_ImportFrom(self, node):
        self.fill("from ")
        self.write("." * (node.level or 0))
        if node.module:
self.write("." * (node.level or 0))
        if node.module:
            self.write(node.module)
        self.write(" import ")
        self.interleave(lambda: self.write(", "), self.traverse, node.names)
    def visit_Assign(self, node):
        self.fill()
        for target in node.targets:
            self.set_precedence(_Precedence.TUPLE, target)
            self.traverse(target)
            self.write(" = ")
        self.traverse(node.value)
        if type_comment := self.get_type_comment(node):
            self.write(type_comment)
    def visit_AugAssign(self, node):
        self.fill()
        self.traverse(node.target)
        self.write(" " + self.binop[node.op.__class__.__name__] + "= ")
        self.traverse(node.value)
    def visit_AnnAssign(self, node):
        self.fill()
        with self.delimit_if("(", ")", not node.simple and isinstance(node.target, Name)):
            self.traverse(node.target)
        self.write(": ")
        self.traverse(node.annotation)
        if node.value:
            self.write(" = ")
            self.traverse(node.value)
    def visit_Return(self, node):
        self.fill("return")
        if node.value:
            self.write(" ")
            self.traverse(node.value)
    def visit_Pass(self, node):
        self.fill("pass")
    def visit_Break(self, node):
        self.fill("break")
    def visit_Continue(self, node):
        self.fill("continue")
    def visit_Delete(self, node):
        self.fill("del ")
        self.interleave(lambda: self.write(", "), self.traverse, node.targets)
    def visit_Assert(self, node):
def visit_Assert(self, node):
        self.fill("assert ")
        self.traverse(node.test)
        if node.msg:
            self.write(", ")
            self.traverse(node.msg)
    def visit_Global(self, node):
        self.fill("global ")
        self.interleave(lambda: self.write(", "), self.write, node.names)
    def visit_Nonlocal(self, node):
        self.fill("nonlocal ")
        self.interleave(lambda: self.write(", "), self.write, node.names)
    def visit_Await(self, node):
        with self.require_parens(_Precedence.AWAIT, node):
            self.write("await")
            if node.value:
                self.write(" ")
                self.set_precedence(_Precedence.ATOM, node.value)
                self.traverse(node.value)
    def visit_Yield(self, node):
        with self.require_parens(_Precedence.YIELD, node):
            self.write("yield")
            if node.value:
                self.write(" ")
                self.set_precedence(_Precedence.ATOM, node.value)
                self.traverse(node.value)
    def visit_YieldFrom(self, node):
        with self.require_parens(_Precedence.YIELD, node):
            self.write("yield from ")
            if not node.value:
                raise ValueError("Node can't be used without a value attribute.")
            self.set_precedence(_Precedence.ATOM, node.value)
            self.traverse(node.value)
    def visit_Raise(self, node):
        self.fill("raise")
        if not node.exc:
            if node.cause:
                raise ValueError(f"Node can't use cause without an exception.")
            return
        self.write(" ")
return
        self.write(" ")
        self.traverse(node.exc)
        if node.cause:
            self.write(" from ")
            self.traverse(node.cause)
    def do_visit_try(self, node):
        self.fill("try")
        with self.block():
            self.traverse(node.body)
        for ex in node.handlers:
            self.traverse(ex)
        if node.orelse:
            self.fill("else")
            with self.block():
                self.traverse(node.orelse)
        if node.finalbody:
            self.fill("finally")
            with self.block():
                self.traverse(node.finalbody)
    def visit_Try(self, node):
        prev_in_try_star = self._in_try_star
        try:
            self._in_try_star = False
            self.do_visit_try(node)
        finally:
            self._in_try_star = prev_in_try_star
    def visit_TryStar(self, node):
        prev_in_try_star = self._in_try_star
        try:
            self._in_try_star = True
            self.do_visit_try(node)
        finally:
            self._in_try_star = prev_in_try_star
    def visit_ExceptHandler(self, node):
        self.fill("except*" if self._in_try_star else "except")
        if node.type:
            self.write(" ")
            self.traverse(node.type)
        if node.name:
            self.write(" as ")
            self.write(node.name)
        with self.block():
            self.traverse(node.body)
    def visit_ClassDef(self, node):
        self.maybe_newline()
        for deco in node.decorator_list:
            self.fill("@")
            self.traverse(deco)
        self.fill("class " + node.name)
self.traverse(deco)
        self.fill("class " + node.name)
        with self.delimit_if("(", ")", condition = node.bases or node.keywords):
            comma = False
            for e in node.bases:
                if comma:
                    self.write(", ")
                else:
                    comma = True
                self.traverse(e)
            for e in node.keywords:
                if comma:
                    self.write(", ")
                else:
                    comma = True
                self.traverse(e)
        with self.block():
            self._write_docstring_and_traverse_body(node)
    def visit_FunctionDef(self, node):
        self._function_helper(node, "def")
    def visit_AsyncFunctionDef(self, node):
        self._function_helper(node, "async def")
    def _function_helper(self, node, fill_suffix):
        self.maybe_newline()
        for deco in node.decorator_list:
            self.fill("@")
            self.traverse(deco)
        def_str = fill_suffix + " " + node.name
        self.fill(def_str)
        with self.delimit("(", ")"):
            self.traverse(node.args)
        if node.returns:
            self.write(" -> ")
            self.traverse(node.returns)
        with self.block(extra=self.get_type_comment(node)):
            self._write_docstring_and_traverse_body(node)
    def visit_For(self, node):
        self._for_helper("for ", node)
    def visit_AsyncFor(self, node):
        self._for_helper("async for ", node)
    def _for_helper(self, fill, node):
        self.fill(fill)
        self.set_precedence(_Precedence.TUPLE, node.target)
        self.traverse(node.target)
self.traverse(node.target)
        self.write(" in ")
        self.traverse(node.iter)
        with self.block(extra=self.get_type_comment(node)):
            self.traverse(node.body)
        if node.orelse:
            self.fill("else")
            with self.block():
                self.traverse(node.orelse)
    def visit_If(self, node):
        self.fill("if ")
        self.traverse(node.test)
        with self.block():
            self.traverse(node.body)
        # collapse nested ifs into equivalent elifs.
        while node.orelse and len(node.orelse) == 1 and isinstance(node.orelse[0], If):
            node = node.orelse[0]
            self.fill("elif ")
            self.traverse(node.test)
            with self.block():
                self.traverse(node.body)
        # final else
        if node.orelse:
            self.fill("else")
            with self.block():
                self.traverse(node.orelse)
    def visit_While(self, node):
        self.fill("while ")
        self.traverse(node.test)
        with self.block():
            self.traverse(node.body)
        if node.orelse:
            self.fill("else")
            with self.block():
                self.traverse(node.orelse)
    def visit_With(self, node):
        self.fill("with ")
        self.interleave(lambda: self.write(", "), self.traverse, node.items)
        with self.block(extra=self.get_type_comment(node)):
            self.traverse(node.body)
    def visit_AsyncWith(self, node):
        self.fill("async with ")
        self.interleave(lambda: self.write(", "), self.traverse, node.items)
self.interleave(lambda: self.write(", "), self.traverse, node.items)
        with self.block(extra=self.get_type_comment(node)):
            self.traverse(node.body)
    def _str_literal_helper(
        self, string, *, quote_types=_ALL_QUOTES, escape_special_whitespace=False
    ):
        """Helper for writing string literals, minimizing escapes.
        Returns the tuple (string literal to write, possible quote types).
        """
        def escape_char(c):
            # \n and \t are non-printable, but we only escape them if
            # escape_special_whitespace is True
            if not escape_special_whitespace and c in "\n\t":
                return c
            # Always escape backslashes and other non-printable characters
            if c == "\\" or not c.isprintable():
                return c.encode("unicode_escape").decode("ascii")
            return c
        escaped_string = "".join(map(escape_char, string))
        possible_quotes = quote_types
        if "\n" in escaped_string:
            possible_quotes = [q for q in possible_quotes if q in _MULTI_QUOTES]
        possible_quotes = [q for q in possible_quotes if q not in escaped_string]
        if not possible_quotes:
            # If there aren't any possible_quotes, fallback to using repr
            # on the original string. Try to use a quote from quote_types,
            # e.g., so that we use triple quotes for docstrings.
            string = repr(string)
            quote = next((q for q in quote_types if string[0] in q), string[0])
            return string[1:-1], [quote]
        if escaped_string:
            # Sort so that we prefer '''"''' over """\""""
            possible_quotes.sort(key=lambda q: q[0] == escaped_string[-1])
possible_quotes.sort(key=lambda q: q[0] == escaped_string[-1])
            # If we're using triple quotes and we'd need to escape a final
            # quote, escape it
            if possible_quotes[0][0] == escaped_string[-1]:
                assert len(possible_quotes[0]) == 3
                escaped_string = escaped_string[:-1] + "\\" + escaped_string[-1]
        return escaped_string, possible_quotes
    def _write_str_avoiding_backslashes(self, string, *, quote_types=_ALL_QUOTES):
        """Write string literal value with a best effort attempt to avoid backslashes."""
        string, quote_types = self._str_literal_helper(string, quote_types=quote_types)
        quote_type = quote_types[0]
        self.write(f"{quote_type}{string}{quote_type}")
    def visit_JoinedStr(self, node):
        self.write("f")
        if self._avoid_backslashes:
            with self.buffered() as buffer:
                self._write_fstring_inner(node)
            return self._write_str_avoiding_backslashes("".join(buffer))
        # If we don't need to avoid backslashes globally (i.e., we only need
        # to avoid them inside FormattedValues), it's cosmetically preferred
        # to use escaped whitespace. That is, it's preferred to use backslashes
        # for cases like: f"{x}\n". To accomplish this, we keep track of what
        # in our buffer corresponds to FormattedValues and what corresponds to
        # Constant parts of the f-string, and allow escapes accordingly.
        fstring_parts = []
        for value in node.values:
            with self.buffered() as buffer:
                self._write_fstring_inner(value)
            fstring_parts.append(
self._write_fstring_inner(value)
            fstring_parts.append(
                ("".join(buffer), isinstance(value, Constant))
            )
        new_fstring_parts = []
        quote_types = list(_ALL_QUOTES)
        fallback_to_repr = False
        for value, is_constant in fstring_parts:
            value, new_quote_types = self._str_literal_helper(
                value,
                quote_types=quote_types,
                escape_special_whitespace=is_constant,
            )
            new_fstring_parts.append(value)
            if set(new_quote_types).isdisjoint(quote_types):
                fallback_to_repr = True
                break
            quote_types = new_quote_types
        if fallback_to_repr:
            # If we weren't able to find a quote type that works for all parts
            # of the JoinedStr, fallback to using repr and triple single quotes.
            quote_types = ["'''"]
            new_fstring_parts.clear()
            for value, is_constant in fstring_parts:
                value = repr('"' + value)  # force repr to use single quotes
                expected_prefix = "'\""
                assert value.startswith(expected_prefix), repr(value)
                new_fstring_parts.append(value[len(expected_prefix):-1])
        value = "".join(new_fstring_parts)
        quote_type = quote_types[0]
        self.write(f"{quote_type}{value}{quote_type}")
    def _write_fstring_inner(self, node):
        if isinstance(node, JoinedStr):
            # for both the f-string itself, and format_spec
            for value in node.values:
                self._write_fstring_inner(value)
        elif isinstance(node, Constant) and isinstance(node.value, str):
            value = node.value.replace("{", "{{").replace("}", "}}")
            self.write(value)