BUG: fix to_csv chunksize producing inconsistent dt64/td64 formatting#65183

Draft

jbrockmendel wants to merge 4 commits into

pandas-dev:mainfrom

jbrockmendel:bug-55481

Commits on Apr 17, 2026

BUG: fix to_csv chunksize producing inconsistent datetime/timedelta formatting (#55481)

jbrockmendel
and
claude
committed
BUG: fix pyright type errors in csvs.py

jbrockmendel
and
claude
committed

Commits on Apr 20, 2026

BUG: fix wrong kwarg name passed to get_format_timedelta64

jbrockmendel
and
claude
committed
TST: flatten chunksize datetime tests to module-level functions

jbrockmendel
and
claude
committed