Added stub for sre_parse and sre_constants(py2) (#1500)

* Added stub for sre_parse (py2)

* Added missing import

* Added missing hints; Fixed _AvType and _TemplateType

* Added stub for sre_constants

stdlib/2/sre_constants.pyi

@@ -0,0 +1,94 @@
+# Source: https://hg.python.org/cpython/file/2.7/Lib/sre_constants.py
+
+from typing import Dict, List, TypeVar
+
+MAGIC = ...  # type: int
+MAXREPEAT = ...  # type: int
+
+class error(Exception): ...
+
+FAILURE = ...  # type: str
+SUCCESS = ...  # type: str
+ANY = ...  # type: str
+ANY_ALL = ...  # type: str
+ASSERT = ...  # type: str
+ASSERT_NOT = ...  # type: str
+AT = ...  # type: str
+BIGCHARSET = ...  # type: str
+BRANCH = ...  # type: str
+CALL = ...  # type: str
+CATEGORY = ...  # type: str
+CHARSET = ...  # type: str
+GROUPREF = ...  # type: str
+GROUPREF_IGNORE = ...  # type: str
+GROUPREF_EXISTS = ...  # type: str
+IN = ...  # type: str
+IN_IGNORE = ...  # type: str
+INFO = ...  # type: str
+JUMP = ...  # type: str
+LITERAL = ...  # type: str
+LITERAL_IGNORE = ...  # type: str
+MARK = ...  # type: str
+MAX_REPEAT = ...  # type: str
+MAX_UNTIL = ...  # type: str
+MIN_REPEAT = ...  # type: str
+MIN_UNTIL = ...  # type: str
+NEGATE = ...  # type: str
+NOT_LITERAL = ...  # type: str
+NOT_LITERAL_IGNORE = ...  # type: str
+RANGE = ...  # type: str
+REPEAT = ...  # type: str
+REPEAT_ONE = ...  # type: str
+SUBPATTERN = ...  # type: str
+MIN_REPEAT_ONE = ...  # type: str
+AT_BEGINNING = ...  # type: str
+AT_BEGINNING_LINE = ...  # type: str
+AT_BEGINNING_STRING = ...  # type: str
+AT_BOUNDARY = ...  # type: str
+AT_NON_BOUNDARY = ...  # type: str
+AT_END = ...  # type: str
+AT_END_LINE = ...  # type: str
+AT_END_STRING = ...  # type: str
+AT_LOC_BOUNDARY = ...  # type: str
+AT_LOC_NON_BOUNDARY = ...  # type: str
+AT_UNI_BOUNDARY = ...  # type: str
+AT_UNI_NON_BOUNDARY = ...  # type: str
+CATEGORY_DIGIT = ...  # type: str
+CATEGORY_NOT_DIGIT = ...  # type: str
+CATEGORY_SPACE = ...  # type: str
+CATEGORY_NOT_SPACE = ...  # type: str
+CATEGORY_WORD = ...  # type: str
+CATEGORY_NOT_WORD = ...  # type: str
+CATEGORY_LINEBREAK = ...  # type: str
+CATEGORY_NOT_LINEBREAK = ...  # type: str
+CATEGORY_LOC_WORD = ...  # type: str
+CATEGORY_LOC_NOT_WORD = ...  # type: str
+CATEGORY_UNI_DIGIT = ...  # type: str
+CATEGORY_UNI_NOT_DIGIT = ...  # type: str
+CATEGORY_UNI_SPACE = ...  # type: str
+CATEGORY_UNI_NOT_SPACE = ...  # type: str
+CATEGORY_UNI_WORD = ...  # type: str
+CATEGORY_UNI_NOT_WORD = ...  # type: str
+CATEGORY_UNI_LINEBREAK = ...  # type: str
+CATEGORY_UNI_NOT_LINEBREAK = ...  # type: str
+
+_T = TypeVar('_T')
+def makedict(list: List[_T]) -> Dict[_T, int]: ...
+
+OP_IGNORE = ...  # type: Dict[str, str]
+AT_MULTILINE = ...  # type: Dict[str, str]
+AT_LOCALE = ...  # type: Dict[str, str]
+AT_UNICODE = ...  # type: Dict[str, str]
+CH_LOCALE = ...  # type: Dict[str, str]
+CH_UNICODE = ...  # type: Dict[str, str]
+SRE_FLAG_TEMPLATE = ...  # type: int
+SRE_FLAG_IGNORECASE = ...  # type: int
+SRE_FLAG_LOCALE = ...  # type: int
+SRE_FLAG_MULTILINE = ...  # type: int
+SRE_FLAG_DOTALL = ...  # type: int
+SRE_FLAG_UNICODE = ...  # type: int
+SRE_FLAG_VERBOSE = ...  # type: int
+SRE_FLAG_DEBUG = ...  # type: int
+SRE_INFO_PREFIX = ...  # type: int
+SRE_INFO_LITERAL = ...  # type: int
+SRE_INFO_CHARSET = ...  # type: int

stdlib/2/sre_parse.pyi

@@ -0,0 +1,63 @@
+# Source: https://hg.python.org/cpython/file/2.7/Lib/sre_parse.py
+
+from typing import Any, Dict, Iterable, List, Match, Optional, Pattern as _Pattern, Set, Tuple, Union
+
+SPECIAL_CHARS = ...  # type: str
+REPEAT_CHARS = ...  # type:     str
+DIGITS = ...  # type: Set
+OCTDIGITS = ...  # type: Set
+HEXDIGITS = ...  # type: Set
+WHITESPACE = ...  # type: Set
+ESCAPES = ...  # type: Dict[str, Tuple[str, int]]
+CATEGORIES = ...  # type: Dict[str, Union[Tuple[str, str], Tuple[str, List[Tuple[str, str]]]]]
+FLAGS = ...  # type: Dict[str, int]
+
+class Pattern:
+    flags = ...  # type: int
+    open = ...  # type: List[int]
+    groups = ...  # type: int
+    groupdict = ...  # type: Dict[str, int]
+    lookbehind = ...  # type: int
+    def __init__(self) -> None: ...
+    def opengroup(self, name: str = ...) -> int: ...
+    def closegroup(self, gid: int) -> None: ...
+    def checkgroup(self, gid: int) -> bool: ...
+
+
+_OpSubpatternType = Tuple[Optional[int], int, int, SubPattern]
+_OpGroupRefExistsType = Tuple[int, SubPattern, SubPattern]
+_OpInType = List[Tuple[str, int]]
+_OpBranchType = Tuple[None, List[SubPattern]]
+_AvType = Union[_OpInType, _OpBranchType, Iterable[SubPattern], _OpGroupRefExistsType, _OpSubpatternType]
+_CodeType = Union[str, _AvType]
+
+class SubPattern:
+    pattern = ...  # type: str
+    data = ...  # type: List[_CodeType]
+    width = ...  # type: Optional[int]
+    def __init__(self, pattern, data: List[_CodeType] = ...) -> None: ...
+    def dump(self, level: int = ...) -> None: ...
+    def __len__(self) -> int: ...
+    def __delitem__(self, index: Union[int, slice]) -> None: ...
+    def __getitem__(self, index: Union[int, slice]) -> Union[SubPattern, _CodeType]: ...
+    def __setitem__(self, index: Union[int, slice], code: _CodeType): ...
+    def insert(self, index, code: _CodeType) -> None: ...
+    def append(self, code: _CodeType) -> None: ...
+    def getwidth(self) -> int: ...
+
+class Tokenizer:
+    string = ...  # type: str
+    index = ...  # type: int
+    def __init__(self, string: str) -> None: ...
+    def match(self, char: str, skip: int = ...) -> int: ...
+    def get(self) -> Optional[str]: ...
+    def tell(self) -> Tuple[int, Optional[str]]: ...
+    def seek(self, index: int) -> None: ...
+
+def isident(char: str) -> bool: ...
+def isdigit(char: str) -> bool: ...
+def isname(name: str) -> bool: ...
+def parse(str: str, flags: int = ..., pattern: Pattern = ...) -> SubPattern: ...
+_Template = Tuple[List[Tuple[int, int]], List[Optional[int]]]
+def parse_template(source: str, pattern: _Pattern) -> _Template: ...
+def expand_template(template: _Template, match: Match) -> str: ...