Update stub for csv (#1398)

stdlib/2/csv.pyi

@@ -1,84 +0,0 @@
-from typing import Any, Dict, Iterable, List, Sequence, Type, Union
-
-# Public interface of _csv.reader's return type
-class _Reader(Iterable[List[str]]):
-    dialect = ...  # type: Dialect
-    line_num = ...  # type: int
-
-    def next(self) -> List[str]: ...
-
-_Row = Sequence[Any]  # May contain anything: csv calls str() on the elements that are not None
-
-# Public interface of _csv.writer's return type
-class _Writer:
-    dialect = ...  # type: Dialect
-
-    def writerow(self, row: _Row) -> None: ...
-    def writerows(self, rows: Iterable[_Row]) -> None: ...
-
-QUOTE_ALL = ...  # type: int
-QUOTE_MINIMAL = ...  # type: int
-QUOTE_NONE = ...  # type: int
-QUOTE_NONNUMERIC = ...  # type: int
-
-class Error(Exception): ...
-
-_Dialect = Union[str, Dialect, Type[Dialect]]
-
-def writer(csvfile: Any, dialect: _Dialect = ..., **fmtparams) -> _Writer: ...
-def reader(csvfile: Iterable[str], dialect: _Dialect = ..., **fmtparams) -> _Reader: ...
-def register_dialect(name, dialect=..., **fmtparams): ...
-def unregister_dialect(name): ...
-def get_dialect(name: str) -> Dialect: ...
-def list_dialects(): ...
-def field_size_limit(new_limit: int = ...) -> int: ...
-
-class Dialect:
-    delimiter = ...  # type: str
-    quotechar = ...  # type: str
-    escapechar = ...  # type: str
-    doublequote = ...  # type: bool
-    skipinitialspace = ...  # type: bool
-    lineterminator = ...  # type: str
-    quoting = ...  # type: int
-    def __init__(self) -> None: ...
-
-class excel(Dialect):
-    pass
-
-class excel_tab(excel):
-    pass
-
-class unix_dialect(Dialect):
-    pass
-
-class DictReader(Iterable):
-    restkey = ...  # type: Any
-    restval = ...  # type: Any
-    reader = ...  # type: Any
-    dialect = ...  # type: _Dialect
-    line_num = ...  # type: int
-    fieldnames = ...  # type: Sequence[Any]
-    def __init__(self, f: Iterable[str], fieldnames: Sequence[Any] = ..., restkey=...,
-                 restval=..., dialect: _Dialect = ..., *args, **kwds) -> None: ...
-    def __iter__(self): ...
-    def next(self): ...
-
-_DictRow = Dict[Any, Union[str, int]]
-
-class DictWriter:
-    fieldnames = ...  # type: Any
-    restval = ...  # type: Any
-    extrasaction = ...  # type: Any
-    writer = ...  # type: Any
-    def __init__(self, f: Any, fieldnames: Sequence[Any], restval=..., extrasaction: str = ...,
-                 dialect: _Dialect = ..., *args, **kwds) -> None: ...
-    def writeheader(self) -> None: ...
-    def writerow(self, rowdict: _DictRow) -> None: ...
-    def writerows(self, rowdicts: Iterable[_DictRow]) -> None: ...
-
-class Sniffer:
-    preferred = ...  # type: Any
-    def __init__(self) -> None: ...
-    def sniff(self, sample: str, delimiters: str = ...) -> Dialect: ...
-    def has_header(self, sample: str) -> bool: ...