Add defaults to csv stubs (#9774)

stdlib/_csv.pyi

@@ -43,42 +43,42 @@ class _writer:
 
 def writer(
     csvfile: SupportsWrite[str],
-    dialect: _DialectLike = ...,
+    dialect: _DialectLike = "excel",
     *,
-    delimiter: str = ...,
-    quotechar: str | None = ...,
-    escapechar: str | None = ...,
-    doublequote: bool = ...,
-    skipinitialspace: bool = ...,
-    lineterminator: str = ...,
-    quoting: _QuotingType = ...,
-    strict: bool = ...,
+    delimiter: str = ",",
+    quotechar: str | None = '"',
+    escapechar: str | None = None,
+    doublequote: bool = True,
+    skipinitialspace: bool = False,
+    lineterminator: str = "\r\n",
+    quoting: _QuotingType = 0,
+    strict: bool = False,
 ) -> _writer: ...
 def reader(
     csvfile: Iterable[str],
-    dialect: _DialectLike = ...,
+    dialect: _DialectLike = "excel",
     *,
-    delimiter: str = ...,
-    quotechar: str | None = ...,
-    escapechar: str | None = ...,
-    doublequote: bool = ...,
-    skipinitialspace: bool = ...,
-    lineterminator: str = ...,
-    quoting: _QuotingType = ...,
-    strict: bool = ...,
+    delimiter: str = ",",
+    quotechar: str | None = '"',
+    escapechar: str | None = None,
+    doublequote: bool = True,
+    skipinitialspace: bool = False,
+    lineterminator: str = "\r\n",
+    quoting: _QuotingType = 0,
+    strict: bool = False,
 ) -> _reader: ...
 def register_dialect(
     name: str,
-    dialect: Any = ...,
+    dialect: type[Dialect] = ...,
     *,
-    delimiter: str = ...,
-    quotechar: str | None = ...,
-    escapechar: str | None = ...,
-    doublequote: bool = ...,
-    skipinitialspace: bool = ...,
-    lineterminator: str = ...,
-    quoting: _QuotingType = ...,
-    strict: bool = ...,
+    delimiter: str = ",",
+    quotechar: str | None = '"',
+    escapechar: str | None = None,
+    doublequote: bool = True,
+    skipinitialspace: bool = False,
+    lineterminator: str = "\r\n",
+    quoting: _QuotingType = 0,
+    strict: bool = False,
 ) -> None: ...
 def unregister_dialect(name: str) -> None: ...
 def get_dialect(name: str) -> Dialect: ...

stdlib/csv.pyi

@@ -80,14 +80,14 @@ class DictReader(Generic[_T], Iterator[_DictReadMapping[_T | Any, str | Any]]):
         restval: str | None = None,
         dialect: _DialectLike = "excel",
         *,
-        delimiter: str = ...,
-        quotechar: str | None = ...,
-        escapechar: str | None = ...,
-        doublequote: bool = ...,
-        skipinitialspace: bool = ...,
-        lineterminator: str = ...,
-        quoting: _QuotingType = ...,
-        strict: bool = ...,
+        delimiter: str = ",",
+        quotechar: str | None = '"',
+        escapechar: str | None = None,
+        doublequote: bool = True,
+        skipinitialspace: bool = False,
+        lineterminator: str = "\r\n",
+        quoting: _QuotingType = 0,
+        strict: bool = False,
     ) -> None: ...
     @overload
     def __init__(
@@ -98,14 +98,14 @@ class DictReader(Generic[_T], Iterator[_DictReadMapping[_T | Any, str | Any]]):
         restval: str | None = None,
         dialect: _DialectLike = "excel",
         *,
-        delimiter: str = ...,
-        quotechar: str | None = ...,
-        escapechar: str | None = ...,
-        doublequote: bool = ...,
-        skipinitialspace: bool = ...,
-        lineterminator: str = ...,
-        quoting: _QuotingType = ...,
-        strict: bool = ...,
+        delimiter: str = ",",
+        quotechar: str | None = '"',
+        escapechar: str | None = None,
+        doublequote: bool = True,
+        skipinitialspace: bool = False,
+        lineterminator: str = "\r\n",
+        quoting: _QuotingType = 0,
+        strict: bool = False,
     ) -> None: ...
     def __iter__(self) -> Self: ...
     def __next__(self) -> _DictReadMapping[_T | Any, str | Any]: ...
@@ -125,14 +125,14 @@ class DictWriter(Generic[_T]):
         extrasaction: Literal["raise", "ignore"] = "raise",
         dialect: _DialectLike = "excel",
         *,
-        delimiter: str = ...,
-        quotechar: str | None = ...,
-        escapechar: str | None = ...,
-        doublequote: bool = ...,
-        skipinitialspace: bool = ...,
-        lineterminator: str = ...,
-        quoting: _QuotingType = ...,
-        strict: bool = ...,
+        delimiter: str = ",",
+        quotechar: str | None = '"',
+        escapechar: str | None = None,
+        doublequote: bool = True,
+        skipinitialspace: bool = False,
+        lineterminator: str = "\r\n",
+        quoting: _QuotingType = 0,
+        strict: bool = False,
     ) -> None: ...
     if sys.version_info >= (3, 8):
         def writeheader(self) -> Any: ...