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csv: csv.reader and csv.writer - mark csvfile as positional only #14350

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csv: csv.reader and csv.writer - mark csvfile as positional only #14350

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@adamtheturtle adamtheturtle commented Jun 29, 2025 •
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import csv

with open("example.csv", "w", newline='') as csvfile:
    csv.writer(csvfile=csvfile)  # TypeError:  expected at least 1 argument, got 0
import csv

csv.reader(csvfile="a")  # TypeError:  expected at least 1 argument, got 0

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According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉

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