bpo-37635: Update arg name for seek() in IO tutorial #16147
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/cc @pitrou |
pitrou
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Sep 14, 2019
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Thanks @aeros167 for the PR 🌮🎉.. I'm working now to backport this PR to: 3.7, 3.8. |
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GH-16150 is a backport of this pull request to the 3.8 branch. |
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GH-16151 is a backport of this pull request to the 3.7 branch. |
miss-islington
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Typically, the second positional argument for ``seek()`` is *whence*. That is the POSIX standard name (http://man7.org/linux/man-pages/man3/lseek.3p.html) and the name listed in the documentation for ``io`` module (https://docs.python.org/3/library/io.htmlGH-io.IOBase.seek). The tutorial for IO is the only location where the second positional argument for ``seek()`` is referred to as *from_what*. I suspect this was created at an early point in Python's history, and was never updated (as this section predates the GitHub repository): ``` $ git grep "from_what" Doc/tutorial/inputoutput.rst:To change the file object's position, use ``f.seek(offset, from_what)``. The position is computed Doc/tutorial/inputoutput.rst:the *from_what* argument. A *from_what* value of 0 measures from the beginning Doc/tutorial/inputoutput.rst:the reference point. *from_what* can be omitted and defaults to 0, using the ``` For consistency, I am suggesting that the tutorial be updated to use the same argument name as the IO documentation and POSIX standard for ``seek()``, particularly since this is the only location where *from_what* is being used. Note: In the POSIX standard, *whence* is technically the third positional argument, but the first argument *fildes* (file descriptor) is implicit in Python. https://bugs.python.org/issue37635 (cherry picked from commit ff603f6) Co-authored-by: Kyle Stanley <aeros167@gmail.com>
miss-islington
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Typically, the second positional argument for ``seek()`` is *whence*. That is the POSIX standard name (http://man7.org/linux/man-pages/man3/lseek.3p.html) and the name listed in the documentation for ``io`` module (https://docs.python.org/3/library/io.htmlGH-io.IOBase.seek). The tutorial for IO is the only location where the second positional argument for ``seek()`` is referred to as *from_what*. I suspect this was created at an early point in Python's history, and was never updated (as this section predates the GitHub repository): ``` $ git grep "from_what" Doc/tutorial/inputoutput.rst:To change the file object's position, use ``f.seek(offset, from_what)``. The position is computed Doc/tutorial/inputoutput.rst:the *from_what* argument. A *from_what* value of 0 measures from the beginning Doc/tutorial/inputoutput.rst:the reference point. *from_what* can be omitted and defaults to 0, using the ``` For consistency, I am suggesting that the tutorial be updated to use the same argument name as the IO documentation and POSIX standard for ``seek()``, particularly since this is the only location where *from_what* is being used. Note: In the POSIX standard, *whence* is technically the third positional argument, but the first argument *fildes* (file descriptor) is implicit in Python. https://bugs.python.org/issue37635 (cherry picked from commit ff603f6) Co-authored-by: Kyle Stanley <aeros167@gmail.com>
miss-islington
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Sep 14, 2019
Typically, the second positional argument for ``seek()`` is *whence*. That is the POSIX standard name (http://man7.org/linux/man-pages/man3/lseek.3p.html) and the name listed in the documentation for ``io`` module (https://docs.python.org/3/library/io.htmlGH-io.IOBase.seek). The tutorial for IO is the only location where the second positional argument for ``seek()`` is referred to as *from_what*. I suspect this was created at an early point in Python's history, and was never updated (as this section predates the GitHub repository): ``` $ git grep "from_what" Doc/tutorial/inputoutput.rst:To change the file object's position, use ``f.seek(offset, from_what)``. The position is computed Doc/tutorial/inputoutput.rst:the *from_what* argument. A *from_what* value of 0 measures from the beginning Doc/tutorial/inputoutput.rst:the reference point. *from_what* can be omitted and defaults to 0, using the ``` For consistency, I am suggesting that the tutorial be updated to use the same argument name as the IO documentation and POSIX standard for ``seek()``, particularly since this is the only location where *from_what* is being used. Note: In the POSIX standard, *whence* is technically the third positional argument, but the first argument *fildes* (file descriptor) is implicit in Python. https://bugs.python.org/issue37635 (cherry picked from commit ff603f6) Co-authored-by: Kyle Stanley <aeros167@gmail.com>
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Thanks Antoine! |
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Typically, the second positional argument for
seek()is whence. That is the POSIX standard name (http://man7.org/linux/man-pages/man3/lseek.3p.html) and the name listed in the documentation foriomodule (https://docs.python.org/3/library/io.html#io.IOBase.seek).The tutorial for IO is the only location where the second positional argument for
seek()is referred to as from_what. I suspect this was created at an early point in Python's history, and was never updated (as this section predates the GitHub repository):For consistency, I am suggesting that the tutorial be updated to use the same argument name as the IO documentation and POSIX standard for
seek(), particularly since this is the only location where from_what is being used.Note: In the POSIX standard, whence is technically the third positional argument, but the first argument fildes (file descriptor) is implicit in Python.
https://bugs.python.org/issue37635
Automerge-Triggered-By: @pitrou