8000 docs: clarify DictReader's treatment of the first data row. by nedbat · Pull Request #118549 · python/cpython · GitHub
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docs: clarify DictReader's treatment of the first data row. #118549

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merged 2 commits into from
May 3, 2024
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docs: clarify DictReader's treatment of the first data row. #118549

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docs: clarify DictReader's treatment of the first data row.
nedbat May 3, 2024
a52cba1
docs: (to squash) tighter wording
nedbat May 3, 2024
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6 changes: 4 additions & 2 deletions Doc/library/csv.rst
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Expand Up @@ -156,8 +156,10 @@ The :mod:`csv` module defines the following classes:

The *fieldnames* parameter is a :term:`sequence`. If *fieldnames* is
omitted, the values in the first row of file *f* will be used as the
fieldnames. Regardless of how the fieldnames are determined, the
dictionary preserves their original ordering.
fieldnames and will be omitted from the results. If
*fieldnames* is provided, they will be used and the first row will be
included in the results. Regardless of how the fieldnames are determined,
the dictionary preserves their original ordering.

If a row has more fields than fieldnames, the remaining data is put in a
list and stored with the fieldname specified by *restkey* (which defaults
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