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Add note that csv.Dialect is usually the wrong class #16450

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Merged
srittau merged 1 commit into from
Sep 28, 2026
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Add note that csv.Dialect is usually the wrong class #16450

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4 changes: 4 additions & 0 deletions stdlib/csv.pyi
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Original file line number Diff line number Diff line change
Expand Up @@ -54,6 +54,10 @@ if sys.version_info < (3, 13):

_T = TypeVar("_T")

# Note that this is often the wrong class: it is only useful for sub-classing
# (e.g. csv.excel). Dialect objects returned at runtime, such as the return
# value of get_dialect(), are usually _csv.Dialect, which is not a subclass
# of csv.Dialect.
class Dialect:
delimiter: str
quotechar: str | None
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