[docs] [issue17418] Documentation links for io.open

[Terry J. Reedy]

Terry J. Reedy added the comment:

Most people should know that os i/o buffers are always bytes. But since beginners read the built-in functions page, I augmented the open() entry, which is what you linked to. I will not change the entries in the io module chapter. I consider this part of the issue closed. That leaves the entry for os.open. I changed the title accordingly.

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title: Documentation for os.open and io.open -> Documentation links for io.open

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue17418>
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