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📁 ..	-	2026-03-21 15:53
📄 __init__.py """A lil' TOML parser.""" __all__ = ("loads", "load", "TOMLDecodeError") __version__ = "1.0.3" # DO NOT EDIT THIS LINE MANUALLY. LET bump2version UTILITY DO IT from pip._vendor.tomli._parser import TOMLDecodeError, load, loads	230 B	2026-01-07 23:39
📁 __pycache__	-	2026-03-21 15:53
📄 _parser.py import string from types import MappingProxyType from typing import ( TYPE_CHECKING, Any, Callable, Dict, FrozenSet, Iterable, Optional, TextIO, Tuple, ) from pip._vendor.tomli._re import ( RE_BIN, RE_DATETIME, RE_HEX, RE_LOCALTIME, RE_NUMBER, RE_OCT, match_to_datetime, match_to_localtime, match_to_number, ) if TYPE_CHECKING: from re import Pattern ASCII_CTRL = frozenset(chr(i) for i in range(32)) \| frozenset(chr(127)) # Neither of these sets include quotation mark or backslash. They are # currently handled as separate cases in the parser functions. ILLEGAL_BASIC_STR_CHARS = ASCII_CTRL - frozenset("\t") ILLEGAL_MULTILINE_BASIC_STR_CHARS = ASCII_CTRL - frozenset("\t\n\r") ILLEGAL_LITERAL_STR_CHARS = ILLEGAL_BASIC_STR_CHARS ILLEGAL_MULTILINE_LITERAL_STR_CHARS = ASCII_CTRL - frozenset("\t\n") ILLEGAL_COMMENT_CHARS = ILLEGAL_BASIC_STR_CHARS TOML_WS = frozenset(" \t") TOML_WS_AND_NEWLINE = TOML_WS \| frozenset("\n") BARE_KEY_CHARS = frozenset(string.ascii_letters + string.digits + "-_") KEY_INITIAL_CHARS = BARE_KEY_CHARS \| frozenset("\"'") BASIC_STR_ESCAPE_REPLACEMENTS = MappingProxyType( { "\\b": "\u0008", # backspace "\\t": "\u0009", # tab "\\n": "\u000A", # linefeed "\\f": "\u000C", # form feed "\\r": "\u000D", # carriage return '\\"': "\u0022", # quote "\\\\": "\u005C", # backslash } ) # Type annotations ParseFloat = Callable[[str], Any] Key = Tuple[str, ...] Pos = int class TOMLDecodeError(ValueError): """An error raised if a document is not valid TOML.""" def load(fp: TextIO, , parse_float: ParseFloat = float) -> Dict[str, Any]: """Parse TOML from a file object.""" s = fp.read() return loads(s, parse_float=parse_float) def loads(s: str, , parse_float: ParseFloat = float) -> Dict[str, Any]: # noqa: C901 """Parse TOML from a string.""" # The spec allows converting "\r\n" to "\n", even in string # literals. Let's do so to simplify parsing. src = s.replace("\r\n", "\n") pos = 0 state = State() # Parse one statement at a time # (typically means one line in TOML source) while True: # 1. Skip line leading whitespace pos = skip_chars(src, pos, TOML_WS) # 2. Parse rules. Expect one of the following: # - end of file # - end of line # - comment # - key/value pair # - append dict to list (and move to its namespace) # - create dict (and move to its namespace) # Skip trailing whitespace when applicable. try: char = src[pos] except IndexError: break if char == "\n": pos += 1 continue if char in KEY_INITIAL_CHARS: pos = key_value_rule(src, pos, state, parse_float) pos = skip_chars(src, pos, TOML_WS) elif char == "[": try: second_char: Optional[str] = src[pos + 1] except IndexError: second_char = None if second_char == "[": pos = create_list_rule(src, pos, state) else: pos = create_dict_rule(src, pos, state) pos = skip_chars(src, pos, TOML_WS) elif char != "#": raise suffixed_err(src, pos, "Invalid statement") # 3. Skip comment pos = skip_comment(src, pos) # 4. Expect end of line or end of file try: char = src[pos] except IndexError: break if char != "\n": raise suffixed_err( src, pos, "Expected newline or end of document after a statement" ) pos += 1 return state.out.dict class State: def __init__(self) -> None: # Mutable, read-only self.out = NestedDict() self.flags = Flags() # Immutable, read and write self.header_namespace: Key = () class Flags: """Flags that map to parsed keys/namespaces.""" # Marks an immutable namespace (inline array or inline table). FROZEN = 0 # Marks a nest that has been explicitly created and can no longer # be opened using the "[table]" syntax. EXPLICIT_NEST = 1 def __init__(self) -> None: self._flags: Dict[str, dict] = {} def unset_all(self, key: Key) -> None: cont = self._flags for k in key[:-1]: if k not in cont: return cont = cont[k]["nested"] cont.pop(key[-1], None) def set_for_relative_key(self, head_key: Key, rel_key: Key, flag: int) -> None: cont = self._flags for k in head_key: if k not in cont: cont[k] = {"flags": set(), "recursive_flags": set(), "nested": {}} cont = cont[k]["nested"] for k in rel_key: if k in cont: cont[k]["flags"].add(flag) else: cont[k] = {"flags": {flag}, "recursive_flags": set(), "nested": {}} cont = cont[k]["nested"] def set(self, key: Key, flag: int, , recursive: bool) -> None: # noqa: A003 cont = self._flags key_parent, key_stem = key[:-1], key[-1] for k in key_parent: if k not in cont: cont[k] = {"flags": set(), "recursive_flags": set(), "nested": {}} cont = cont[k]["nested"] if key_stem not in cont: cont[key_stem] = {"flags": set(), "recursive_flags": set(), "nested": {}} cont[key_stem]["recursive_flags" if recursive else "flags"].add(flag) def is_(self, key: Key, flag: int) -> bool: if not key: return False # document root has no flags cont = self._flags for k in key[:-1]: if k not in cont: return False inner_cont = cont[k] if flag in inner_cont["recursive_flags"]: return True cont = inner_cont["nested"] key_stem = key[-1] if key_stem in cont: cont = cont[key_stem] return flag in cont["flags"] or flag in cont["recursive_flags"] return False class NestedDict: def __init__(self) -> None: # The parsed content of the TOML document self.dict: Dict[str, Any] = {} def get_or_create_nest( self, key: Key, , access_lists: bool = True, ) -> dict: cont: Any = self.dict for k in key: if k not in cont: cont[k] = {} cont = cont[k] if access_lists and isinstance(cont, list): cont = cont[-1] if not isinstance(cont, dict): raise KeyError("There is no nest behind this key") return cont def append_nest_to_list(self, key: Key) -> None: cont = self.get_or_create_nest(key[:-1]) last_key = key[-1] if last_key in cont: list_ = cont[last_key] if not isinstance(list_, list): raise KeyError("An object other than list found behind this key") list_.append({}) else: cont[last_key] = [{}] def skip_chars(src: str, pos: Pos, chars: Iterable[str]) -> Pos: try: while src[pos] in chars: pos += 1 except IndexError: pass return pos def skip_until( src: str, pos: Pos, expect: str, , error_on: FrozenSet[str], error_on_eof: bool, ) -> Pos: try: new_pos = src.index(expect, pos) except ValueError: new_pos = len(src) if error_on_eof: raise suffixed_err(src, new_pos, f'Expected "{expect!r}"') bad_chars = error_on.intersection(src[pos:new_pos]) if bad_chars: bad_char = next(iter(bad_chars)) bad_pos = src.index(bad_char, pos) raise suffixed_err(src, bad_pos, f'Found invalid character "{bad_char!r}"') return new_pos def skip_comment(src: str, pos: Pos) -> Pos: try: char: Optional[str] = src[pos] except IndexError: char = None if char == "#": return skip_until( src, pos + 1, "\n", error_on=ILLEGAL_COMMENT_CHARS, error_on_eof=False ) return pos def skip_comments_and_array_ws(src: str, pos: Pos) -> Pos: while True: pos_before_skip = pos pos = skip_chars(src, pos, TOML_WS_AND_NEWLINE) pos = skip_comment(src, pos) if pos == pos_before_skip: return pos def create_dict_rule(src: str, pos: Pos, state: State) -> Pos: pos += 1 # Skip "[" pos = skip_chars(src, pos, TOML_WS) pos, key = parse_key(src, pos) if state.flags.is_(key, Flags.EXPLICIT_NEST) or state.flags.is_(key, Flags.FROZEN): raise suffixed_err(src, pos, f"Can not declare {key} twice") state.flags.set(key, Flags.EXPLICIT_NEST, recursive=False) try: state.out.get_or_create_nest(key) except KeyError: raise suffixed_err(src, pos, "Can not overwrite a value") state.header_namespace = key if src[pos : pos + 1] != "]": raise suffixed_err(src, pos, 'Expected "]" at the end of a table declaration') return pos + 1 def create_list_rule(src: str, pos: Pos, state: State) -> Pos: pos += 2 # Skip "[[" pos = skip_chars(src, pos, TOML_WS) pos, key = parse_key(src, pos) if state.flags.is_(key, Flags.FROZEN): raise suffixed_err(src, pos, f"Can not mutate immutable namespace {key}") # Free the namespace now that it points to another empty list item... state.flags.unset_all(key) # ...but this key precisely is still prohibited from table declaration state.flags.set(key, Flags.EXPLICIT_NEST, recursive=False) try: state.out.append_nest_to_list(key) except KeyError: raise suffixed_err(src, pos, "Can not overwrite a value") state.header_namespace = key end_marker = src[pos : pos + 2] if end_marker != "]]": raise suffixed_err( src, pos, f'Found "{end_marker!r}" at the end of an array declaration.' ' Expected "]]"', ) return pos + 2 def key_value_rule(src: str, pos: Pos, state: State, parse_float: ParseFloat) -> Pos: pos, key, value = parse_key_value_pair(src, pos, parse_float) key_parent, key_stem = key[:-1], key[-1] abs_key_parent = state.header_namespace + key_parent if state.flags.is_(abs_key_parent, Flags.FROZEN): raise suffixed_err( src, pos, f"Can not mutate immutable namespace {abs_key_parent}" ) # Containers in the relative path can't be opened with the table syntax after this state.flags.set_for_relative_key(state.header_namespace, key, Flags.EXPLICIT_NEST) try: nest = state.out.get_or_create_nest(abs_key_parent) except KeyError: raise suffixed_err(src, pos, "Can not overwrite a value") if key_stem in nest: raise suffixed_err(src, pos, "Can not overwrite a value") # Mark inline table and array namespaces recursively immutable if isinstance(value, (dict, list)): abs_key = state.header_namespace + key state.flags.set(abs_key, Flags.FROZEN, recursive=True) nest[key_stem] = value return pos def parse_key_value_pair( src: str, pos: Pos, parse_float: ParseFloat ) -> Tuple[Pos, Key, Any]: pos, key = parse_key(src, pos) try: char: Optional[str] = src[pos] except IndexError: char = None if char != "=": raise suffixed_err(src, pos, 'Expected "=" after a key in a key/value pair') pos += 1 pos = skip_chars(src, pos, TOML_WS) pos, value = parse_value(src, pos, parse_float) return pos, key, value def parse_key(src: str, pos: Pos) -> Tuple[Pos, Key]: pos, key_part = parse_key_part(src, pos) key = [key_part] pos = skip_chars(src, pos, TOML_WS) while True: try: char: Optional[str] = src[pos] except IndexError: char = None if char != ".": return pos, tuple(key) pos += 1 pos = skip_chars(src, pos, TOML_WS) pos, key_part = parse_key_part(src, pos) key.append(key_part) pos = skip_chars(src, pos, TOML_WS) def parse_key_part(src: str, pos: Pos) -> Tuple[Pos, str]: try: char: Optional[str] = src[pos] except IndexError: char = None if char in BARE_KEY_CHARS: start_pos = pos pos = skip_chars(src, pos, BARE_KEY_CHARS) return pos, src[start_pos:pos] if char == "'": return parse_literal_str(src, pos) if char == '"': return parse_one_line_basic_str(src, pos) raise suffixed_err(src, pos, "Invalid initial character for a key part") def parse_one_line_basic_str(src: str, pos: Pos) -> Tuple[Pos, str]: pos += 1 return parse_basic_str(src, pos, multiline=False) def parse_array(src: str, pos: Pos, parse_float: ParseFloat) -> Tuple[Pos, list]: pos += 1 array: list = [] pos = skip_comments_and_array_ws(src, pos) if src[pos : pos + 1] == "]": return pos + 1, array while True: pos, val = parse_value(src, pos, parse_float) array.append(val) pos = skip_comments_and_array_ws(src, pos) c = src[pos : pos + 1] if c == "]": return pos + 1, array if c != ",": raise suffixed_err(src, pos, "Unclosed array") pos += 1 pos = skip_comments_and_array_ws(src, pos) if src[pos : pos + 1] == "]": return pos + 1, array def parse_inline_table(src: str, pos: Pos, parse_float: ParseFloat) -> Tuple[Pos, dict]: pos += 1 nested_dict = NestedDict() flags = Flags() pos = skip_chars(src, pos, TOML_WS) if src[pos : pos + 1] == "}": return pos + 1, nested_dict.dict while True: pos, key, value = parse_key_value_pair(src, pos, parse_float) key_parent, key_stem = key[:-1], key[-1] if flags.is_(key, Flags.FROZEN): raise suffixed_err(src, pos, f"Can not mutate immutable namespace {key}") try: nest = nested_dict.get_or_create_nest(key_parent, access_lists=False) except KeyError: raise suffixed_err(src, pos, "Can not overwrite a value") if key_stem in nest: raise suffixed_err(src, pos, f'Duplicate inline table key "{key_stem}"') nest[key_stem] = value pos = skip_chars(src, pos, TOML_WS) c = src[pos : pos + 1] if c == "}": return pos + 1, nested_dict.dict if c != ",": raise suffixed_err(src, pos, "Unclosed inline table") if isinstance(value, (dict, list)): flags.set(key, Flags.FROZEN, recursive=True) pos += 1 pos = skip_chars(src, pos, TOML_WS) def parse_basic_str_escape( src: str, pos: Pos, , multiline: bool = False ) -> Tuple[Pos, str]: escape_id = src[pos : pos + 2] pos += 2 if multiline and escape_id in {"\\ ", "\\\t", "\\\n"}: # Skip whitespace until next non-whitespace character or end of # the doc. Error if non-whitespace is found before newline. if escape_id != "\\\n": pos = skip_chars(src, pos, TOML_WS) char = src[pos : pos + 1] if not char: return pos, "" if char != "\n": raise suffixed_err(src, pos, 'Unescaped "\\" in a string') pos += 1 pos = skip_chars(src, pos, TOML_WS_AND_NEWLINE) return pos, "" if escape_id == "\\u": return parse_hex_char(src, pos, 4) if escape_id == "\\U": return parse_hex_char(src, pos, 8) try: return pos, BASIC_STR_ESCAPE_REPLACEMENTS[escape_id] except KeyError: if len(escape_id) != 2: raise suffixed_err(src, pos, "Unterminated string") raise suffixed_err(src, pos, 'Unescaped "\\" in a string') def parse_basic_str_escape_multiline(src: str, pos: Pos) -> Tuple[Pos, str]: return parse_basic_str_escape(src, pos, multiline=True) def parse_hex_char(src: str, pos: Pos, hex_len: int) -> Tuple[Pos, str]: hex_str = src[pos : pos + hex_len] if len(hex_str) != hex_len or any(c not in string.hexdigits for c in hex_str): raise suffixed_err(src, pos, "Invalid hex value") pos += hex_len hex_int = int(hex_str, 16) if not is_unicode_scalar_value(hex_int): raise suffixed_err(src, pos, "Escaped character is not a Unicode scalar value") return pos, chr(hex_int) def parse_literal_str(src: str, pos: Pos) -> Tuple[Pos, str]: pos += 1 # Skip starting apostrophe start_pos = pos pos = skip_until( src, pos, "'", error_on=ILLEGAL_LITERAL_STR_CHARS, error_on_eof=True ) return pos + 1, src[start_pos:pos] # Skip ending apostrophe def parse_multiline_str(src: str, pos: Pos, , literal: bool) -> Tuple[Pos, str]: pos += 3 if src[pos : pos + 1] == "\n": pos += 1 if literal: delim = "'" end_pos = skip_until( src, pos, "'''", error_on=ILLEGAL_MULTILINE_LITERAL_STR_CHARS, error_on_eof=True, ) result = src[pos:end_pos] pos = end_pos + 3 else: delim = '"' pos, result = parse_basic_str(src, pos, multiline=True) # Add at maximum two extra apostrophes/quotes if the end sequence # is 4 or 5 chars long instead of just 3. if src[pos : pos + 1] != delim: return pos, result pos += 1 if src[pos : pos + 1] != delim: return pos, result + delim pos += 1 return pos, result + (delim 2) def parse_basic_str(src: str, pos: Pos, *, multiline: bool) -> Tuple[Pos, str]: if multiline: error_on = ILLEGAL_MULTILINE_BASIC_STR_CHARS parse_escapes = parse_basic_str_escape_multiline else: error_on = ILLEGAL_BASIC_STR_CHARS parse_escapes = parse_basic_str_escape result = "" start_pos = pos while True: try: char = src[pos] except IndexError: raise suffixed_err(src, pos, "Unterminated string") if char == '"': if not multiline: return pos + 1, result + src[start_pos:pos] if src[pos + 1 : pos + 3] == '""': return pos + 3, result + src[start_pos:pos] pos += 1 continue if char == "\\": result += src[start_pos:pos] pos, parsed_escape = parse_escapes(src, pos) result += parsed_escape start_pos = pos continue if char in error_on: raise suffixed_err(src, pos, f'Illegal character "{char!r}"') pos += 1 def parse_regex(src: str, pos: Pos, regex: "Pattern") -> Tuple[Pos, str]: match = regex.match(src, pos) if not match: raise suffixed_err(src, pos, "Unexpected sequence") return match.end(), match.group() def parse_value( # noqa: C901 src: str, pos: Pos, parse_float: ParseFloat ) -> Tuple[Pos, Any]: try: char: Optional[str] = src[pos] except IndexError: char = None # Basic strings if char == '"': if src[pos + 1 : pos + 3] == '""': return parse_multiline_str(src, pos, literal=False) return parse_one_line_basic_str(src, pos) # Literal strings if char == "'": if src[pos + 1 : pos + 3] == "''": return parse_multiline_str(src, pos, literal=True) return parse_literal_str(src, pos) # Booleans if char == "t": if src[pos + 1 : pos + 4] == "rue": return pos + 4, True if char == "f": if src[pos + 1 : pos + 5] == "alse": return pos + 5, False # Dates and times datetime_match = RE_DATETIME.match(src, pos) if datetime_match: try: datetime_obj = match_to_datetime(datetime_match) except ValueError: raise suffixed_err(src, pos, "Invalid date or datetime") return datetime_match.end(), datetime_obj localtime_match = RE_LOCALTIME.match(src, pos) if localtime_match: return localtime_match.end(), match_to_localtime(localtime_match) # Non-decimal integers if char == "0": second_char = src[pos + 1 : pos + 2] if second_char == "x": pos, hex_str = parse_regex(src, pos + 2, RE_HEX) return pos, int(hex_str, 16) if second_char == "o": pos, oct_str = parse_regex(src, pos + 2, RE_OCT) return pos, int(oct_str, 8) if second_char == "b": pos, bin_str = parse_regex(src, pos + 2, RE_BIN) return pos, int(bin_str, 2) # Decimal integers and "normal" floats. # The regex will greedily match any type starting with a decimal # char, so needs to be located after handling of non-decimal ints, # and dates and times. number_match = RE_NUMBER.match(src, pos) if number_match: return number_match.end(), match_to_number(number_match, parse_float) # Arrays if char == "[": return parse_array(src, pos, parse_float) # Inline tables if char == "{": return parse_inline_table(src, pos, parse_float) # Special floats first_three = src[pos : pos + 3] if first_three in {"inf", "nan"}: return pos + 3, parse_float(first_three) first_four = src[pos : pos + 4] if first_four in {"-inf", "+inf", "-nan", "+nan"}: return pos + 4, parse_float(first_four) raise suffixed_err(src, pos, "Invalid value") def suffixed_err(src: str, pos: Pos, msg: str) -> TOMLDecodeError: """Return a `TOMLDecodeError` where error message is suffixed with coordinates in source.""" def coord_repr(src: str, pos: Pos) -> str: if pos >= len(src): return "end of document" line = src.count("\n", 0, pos) + 1 if line == 1: column = pos + 1 else: column = pos - src.rindex("\n", 0, pos) return f"line {line}, column {column}" return TOMLDecodeError(f"{msg} (at {coord_repr(src, pos)})") def is_unicode_scalar_value(codepoint: int) -> bool: return (0 <= codepoint <= 55295) or (57344 <= codepoint <= 1114111)	21.89 KB	2026-01-07 23:39
📄 _re.py from datetime import date, datetime, time, timedelta, timezone, tzinfo import re from typing import TYPE_CHECKING, Any, Optional, Union if TYPE_CHECKING: from re import Match from pip._vendor.tomli._parser import ParseFloat # E.g. # - 00:32:00.999999 # - 00:32:00 _TIME_RE_STR = r"([01][0-9]\|2[0-3]):([0-5][0-9]):([0-5][0-9])(\.[0-9]+)?" RE_HEX = re.compile(r"[0-9A-Fa-f](?:_?[0-9A-Fa-f])") RE_BIN = re.compile(r"[01](?:_?[01])") RE_OCT = re.compile(r"[0-7](?:_?[0-7])") RE_NUMBER = re.compile( r"[+-]?(?:0\|[1-9](?:_?[0-9]))" # integer + r"(?:\.[0-9](?:_?[0-9]))?" # optional fractional part + r"(?:[eE][+-]?[0-9](?:_?[0-9]))?" # optional exponent part ) RE_LOCALTIME = re.compile(_TIME_RE_STR) RE_DATETIME = re.compile( r"([0-9]{4})-(0[1-9]\|1[0-2])-(0[1-9]\|1[0-9]\|2[0-9]\|3[01])" # date, e.g. 1988-10-27 + r"(?:" + r"[T ]" + _TIME_RE_STR + r"(?:(Z)\|([+-])([01][0-9]\|2[0-3]):([0-5][0-9]))?" # time offset + r")?" ) def match_to_datetime(match: "Match") -> Union[datetime, date]: """Convert a `RE_DATETIME` match to `datetime.datetime` or `datetime.date`. Raises ValueError if the match does not correspond to a valid date or datetime. """ ( year_str, month_str, day_str, hour_str, minute_str, sec_str, micros_str, zulu_time, offset_dir_str, offset_hour_str, offset_minute_str, ) = match.groups() year, month, day = int(year_str), int(month_str), int(day_str) if hour_str is None: return date(year, month, day) hour, minute, sec = int(hour_str), int(minute_str), int(sec_str) micros = int(micros_str[1:].ljust(6, "0")[:6]) if micros_str else 0 if offset_dir_str: offset_dir = 1 if offset_dir_str == "+" else -1 tz: Optional[tzinfo] = timezone( timedelta( hours=offset_dir * int(offset_hour_str), minutes=offset_dir * int(offset_minute_str), ) ) elif zulu_time: tz = timezone.utc else: # local date-time tz = None return datetime(year, month, day, hour, minute, sec, micros, tzinfo=tz) def match_to_localtime(match: "Match") -> time: hour_str, minute_str, sec_str, micros_str = match.groups() micros = int(micros_str[1:].ljust(6, "0")[:6]) if micros_str else 0 return time(int(hour_str), int(minute_str), int(sec_str), micros) def match_to_number(match: "Match", parse_float: "ParseFloat") -> Any: match_str = match.group() if "." in match_str or "e" in match_str or "E" in match_str: return parse_float(match_str) return int(match_str)	2.62 KB	2026-01-07 23:39

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