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GH-119054: Add "Expanding and resolving paths" section to pathlib docs. (#120970)
Add dedicated subsection for `home()`, `expanduser()`, `cwd()`, `absolute()`, `resolve()` and `readlink()`. The position of this section keeps all the `Path` constructors (`Path()`, `Path.from_uri()`, `Path.home()` and `Path.cwd()`) near the top. Within the section, closely related methods are kept adjacent. Specifically: -.`home()` and `expanduser()` (the former calls the latter) - `cwd()` and `absolute()` (the former calls the latter) - `absolute()` and `resolve()` (both make paths absolute) - `resolve()` and `readlink()` (both read symlink targets) - Ditto `cwd()` and `absolute()` - Ditto `absolute()` and `resolve()` The "Other methods" section is removed.
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Barney Gale
GitHub
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@ -885,6 +885,107 @@ conforming to :rfc:`8089`.
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it strictly impure.
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Expanding and resolving paths
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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.. classmethod:: Path.home()
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Return a new path object representing the user's home directory (as
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returned by :func:`os.path.expanduser` with ``~`` construct). If the home
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directory can't be resolved, :exc:`RuntimeError` is raised.
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::
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>>> Path.home()
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PosixPath('/home/antoine')
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.. versionadded:: 3.5
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.. method:: Path.expanduser()
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Return a new path with expanded ``~`` and ``~user`` constructs,
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as returned by :meth:`os.path.expanduser`. If a home directory can't be
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resolved, :exc:`RuntimeError` is raised.
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::
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>>> p = PosixPath('~/films/Monty Python')
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>>> p.expanduser()
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PosixPath('/home/eric/films/Monty Python')
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.. versionadded:: 3.5
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.. classmethod:: Path.cwd()
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Return a new path object representing the current directory (as returned
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by :func:`os.getcwd`)::
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>>> Path.cwd()
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PosixPath('/home/antoine/pathlib')
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.. method:: Path.absolute()
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Make the path absolute, without normalization or resolving symlinks.
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Returns a new path object::
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>>> p = Path('tests')
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>>> p
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PosixPath('tests')
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>>> p.absolute()
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PosixPath('/home/antoine/pathlib/tests')
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.. method:: Path.resolve(strict=False)
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Make the path absolute, resolving any symlinks. A new path object is
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returned::
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>>> p = Path()
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>>> p
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PosixPath('.')
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>>> p.resolve()
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PosixPath('/home/antoine/pathlib')
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"``..``" components are also eliminated (this is the only method to do so)::
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>>> p = Path('docs/../setup.py')
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>>> p.resolve()
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PosixPath('/home/antoine/pathlib/setup.py')
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If a path doesn't exist or a symlink loop is encountered, and *strict* is
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``True``, :exc:`OSError` is raised. If *strict* is ``False``, the path is
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resolved as far as possible and any remainder is appended without checking
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whether it exists.
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.. versionchanged:: 3.6
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The *strict* parameter was added (pre-3.6 behavior is strict).
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.. versionchanged:: 3.13
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Symlink loops are treated like other errors: :exc:`OSError` is raised in
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strict mode, and no exception is raised in non-strict mode. In previous
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versions, :exc:`RuntimeError` is raised no matter the value of *strict*.
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.. method:: Path.readlink()
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Return the path to which the symbolic link points (as returned by
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:func:`os.readlink`)::
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>>> p = Path('mylink')
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>>> p.symlink_to('setup.py')
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>>> p.readlink()
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PosixPath('setup.py')
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.. versionadded:: 3.9
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.. versionchanged:: 3.13
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Raises :exc:`UnsupportedOperation` if :func:`os.readlink` is not
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available. In previous versions, :exc:`NotImplementedError` was raised.
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Querying file type and status
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -1605,107 +1706,6 @@ Permissions and ownership
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symbolic link's mode is changed rather than its target's.
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Other methods
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^^^^^^^^^^^^^
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.. classmethod:: Path.cwd()
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Return a new path object representing the current directory (as returned
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by :func:`os.getcwd`)::
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>>> Path.cwd()
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PosixPath('/home/antoine/pathlib')
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.. classmethod:: Path.home()
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Return a new path object representing the user's home directory (as
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returned by :func:`os.path.expanduser` with ``~`` construct). If the home
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directory can't be resolved, :exc:`RuntimeError` is raised.
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::
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>>> Path.home()
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PosixPath('/home/antoine')
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.. versionadded:: 3.5
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.. method:: Path.expanduser()
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Return a new path with expanded ``~`` and ``~user`` constructs,
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as returned by :meth:`os.path.expanduser`. If a home directory can't be
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resolved, :exc:`RuntimeError` is raised.
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::
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>>> p = PosixPath('~/films/Monty Python')
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>>> p.expanduser()
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PosixPath('/home/eric/films/Monty Python')
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.. versionadded:: 3.5
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.. method:: Path.readlink()
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Return the path to which the symbolic link points (as returned by
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:func:`os.readlink`)::
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>>> p = Path('mylink')
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>>> p.symlink_to('setup.py')
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>>> p.readlink()
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PosixPath('setup.py')
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.. versionadded:: 3.9
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.. versionchanged:: 3.13
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Raises :exc:`UnsupportedOperation` if :func:`os.readlink` is not
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available. In previous versions, :exc:`NotImplementedError` was raised.
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.. method:: Path.absolute()
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Make the path absolute, without normalization or resolving symlinks.
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Returns a new path object::
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>>> p = Path('tests')
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>>> p
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PosixPath('tests')
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>>> p.absolute()
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PosixPath('/home/antoine/pathlib/tests')
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.. method:: Path.resolve(strict=False)
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Make the path absolute, resolving any symlinks. A new path object is
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returned::
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>>> p = Path()
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>>> p
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PosixPath('.')
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>>> p.resolve()
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PosixPath('/home/antoine/pathlib')
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"``..``" components are also eliminated (this is the only method to do so)::
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>>> p = Path('docs/../setup.py')
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>>> p.resolve()
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PosixPath('/home/antoine/pathlib/setup.py')
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If a path doesn't exist or a symlink loop is encountered, and *strict* is
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``True``, :exc:`OSError` is raised. If *strict* is ``False``, the path is
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resolved as far as possible and any remainder is appended without checking
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whether it exists.
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.. versionchanged:: 3.6
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The *strict* parameter was added (pre-3.6 behavior is strict).
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.. versionchanged:: 3.13
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Symlink loops are treated like other errors: :exc:`OSError` is raised in
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strict mode, and no exception is raised in non-strict mode. In previous
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versions, :exc:`RuntimeError` is raised no matter the value of *strict*.
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.. _pathlib-pattern-language:
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Pattern language
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