GH-119054: Add "Reading and writing files" section to pathlib docs (#119524)

Add a dedicated subsection for `open()`, `read_text()`, `read_bytes()`,
`write_text()` and `write_bytes()`.
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Barney Gale 2024-06-02 20:39:19 +01:00 committed by GitHub
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1 changed files with 84 additions and 79 deletions

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@ -1067,6 +1067,90 @@ Querying file type and status
.. versionadded:: 3.5
Reading and writing files
^^^^^^^^^^^^^^^^^^^^^^^^^
.. method:: Path.open(mode='r', buffering=-1, encoding=None, errors=None, newline=None)
Open the file pointed to by the path, like the built-in :func:`open`
function does::
>>> p = Path('setup.py')
>>> with p.open() as f:
... f.readline()
...
'#!/usr/bin/env python3\n'
.. method:: Path.read_text(encoding=None, errors=None, newline=None)
Return the decoded contents of the pointed-to file as a string::
>>> p = Path('my_text_file')
>>> p.write_text('Text file contents')
18
>>> p.read_text()
'Text file contents'
The file is opened and then closed. The optional parameters have the same
meaning as in :func:`open`.
.. versionadded:: 3.5
.. versionchanged:: 3.13
The *newline* parameter was added.
.. method:: Path.read_bytes()
Return the binary contents of the pointed-to file as a bytes object::
>>> p = Path('my_binary_file')
>>> p.write_bytes(b'Binary file contents')
20
>>> p.read_bytes()
b'Binary file contents'
.. versionadded:: 3.5
.. method:: Path.write_text(data, encoding=None, errors=None, newline=None)
Open the file pointed to in text mode, write *data* to it, and close the
file::
>>> p = Path('my_text_file')
>>> p.write_text('Text file contents')
18
>>> p.read_text()
'Text file contents'
An existing file of the same name is overwritten. The optional parameters
have the same meaning as in :func:`open`.
.. versionadded:: 3.5
.. versionchanged:: 3.10
The *newline* parameter was added.
.. method:: Path.write_bytes(data)
Open the file pointed to in bytes mode, write *data* to it, and close the
file::
>>> p = Path('my_binary_file')
>>> p.write_bytes(b'Binary file contents')
20
>>> p.read_bytes()
b'Binary file contents'
An existing file of the same name is overwritten.
.. versionadded:: 3.5
Other methods
^^^^^^^^^^^^^
@ -1360,18 +1444,6 @@ example because the path doesn't exist).
The *exist_ok* parameter was added.
.. method:: Path.open(mode='r', buffering=-1, encoding=None, errors=None, newline=None)
Open the file pointed to by the path, like the built-in :func:`open`
function does::
>>> p = Path('setup.py')
>>> with p.open() as f:
... f.readline()
...
'#!/usr/bin/env python3\n'
.. method:: Path.owner(*, follow_symlinks=True)
Return the name of the user owning the file. :exc:`KeyError` is raised
@ -1388,37 +1460,6 @@ example because the path doesn't exist).
The *follow_symlinks* parameter was added.
.. method:: Path.read_bytes()
Return the binary contents of the pointed-to file as a bytes object::
>>> p = Path('my_binary_file')
>>> p.write_bytes(b'Binary file contents')
20
>>> p.read_bytes()
b'Binary file contents'
.. versionadded:: 3.5
.. method:: Path.read_text(encoding=None, errors=None, newline=None)
Return the decoded contents of the pointed-to file as a string::
>>> p = Path('my_text_file')
>>> p.write_text('Text file contents')
18
>>> p.read_text()
'Text file contents'
The file is opened and then closed. The optional parameters have the same
meaning as in :func:`open`.
.. versionadded:: 3.5
.. versionchanged:: 3.13
The *newline* parameter was added.
.. method:: Path.readlink()
Return the path to which the symbolic link points (as returned by
@ -1593,42 +1634,6 @@ example because the path doesn't exist).
The *missing_ok* parameter was added.
.. method:: Path.write_bytes(data)
Open the file pointed to in bytes mode, write *data* to it, and close the
file::
>>> p = Path('my_binary_file')
>>> p.write_bytes(b'Binary file contents')
20
>>> p.read_bytes()
b'Binary file contents'
An existing file of the same name is overwritten.
.. versionadded:: 3.5
.. method:: Path.write_text(data, encoding=None, errors=None, newline=None)
Open the file pointed to in text mode, write *data* to it, and close the
file::
>>> p = Path('my_text_file')
>>> p.write_text('Text file contents')
18
>>> p.read_text()
'Text file contents'
An existing file of the same name is overwritten. The optional parameters
have the same meaning as in :func:`open`.
.. versionadded:: 3.5
.. versionchanged:: 3.10
The *newline* parameter was added.
.. _pathlib-pattern-language:
Pattern language