QDir ¶

函数 ¶

静态函数 ¶

Navigation and Directory Operations ¶

A directory’s path can be obtained with the path() function, and a new path set with the setPath() function. The absolute path to a directory is found by calling absolutePath() .

The name of a directory is found using the dirName() function. This typically returns the last element in the absolute path that specifies the location of the directory. However, it can also return “.” if the QDir represents the current directory.

QDir("Documents/Letters/Applications").dirName() # "Applications"
QDir().dirName()                                 # "."
												

The path for a directory can also be changed with the cd() and cdUp() functions, both of which operate like familiar shell commands. When cd() is called with the name of an existing directory, the QDir object changes directory so that it represents that directory instead. The cdUp() function changes the directory of the QDir object so that it refers to its parent directory; i.e. cd(“..”) is equivalent to cdUp() .

Directories can be created with mkdir() , renamed with rename() , and removed with rmdir() .

You can test for the presence of a directory with a given name by using exists() , and the properties of a directory can be tested with isReadable() , isAbsolute() , isRelative() ，和 isRoot() .

refresh() function re-reads the directory’s data from disk.

Files and Directory Contents ¶

Directories contain a number of entries, representing files, directories, and symbolic links. The number of entries in a directory is returned by count() . A string list of the names of all the entries in a directory can be obtained with entryList() . If you need information about each entry, use entryInfoList() to obtain a list of QFileInfo 对象。

Paths to files and directories within a directory can be constructed using filePath() and absoluteFilePath() 。 filePath() function returns a path to the specified file or directory relative to the path of the QDir object; absoluteFilePath() returns an absolute path to the specified file or directory. Neither of these functions checks for the existence of files or directory; they only construct paths.

directory = QDir("Documents/Letters")
path = directory.filePath("contents.txt")
absolutePath = directory.absoluteFilePath("contents.txt")
												

Files can be removed by using the remove() function. Directories cannot be removed in the same way as files; use rmdir() to remove them instead.

It is possible to reduce the number of entries returned by entryList() and entryInfoList() by applying filters to a QDir object. You can apply a name filter to specify a pattern with wildcards that file names need to match, an attribute filter that selects properties of entries and can distinguish between files and directories, and a sort order.

Name filters are lists of strings that are passed to setNameFilters() . Attribute filters consist of a bitwise OR combination of Filters, and these are specified when calling setFilter() . The sort order is specified using setSorting() with a bitwise OR combination of SortFlags .

You can test to see if a filename matches a filter using the match() 函数。

Filter and sort order flags may also be specified when calling entryList() and entryInfoList() in order to override previously defined behavior.

The Current Directory and Other Special Paths ¶

Access to some common directories is provided with a number of static functions that return QDir objects. There are also corresponding functions for these that return strings:

QDir	QString	Return Value
current()	currentPath()	The application’s working directory
home()	homePath()	The user’s home directory
root()	rootPath()	The root directory
temp()	tempPath()	The system’s temporary directory

setCurrent() static function can also be used to set the application’s working directory.

If you want to find the directory containing the application’s executable, see applicationDirPath() .

drives() static function provides a list of root directories for each device that contains a filing system. On Unix systems this returns a list containing a single root directory “/”; on Windows the list will usually contain C:/ , and possibly other drive letters such as D:/ , depending on the configuration of the user’s system.

Path Manipulation and Strings ¶

Paths containing “.” elements that reference the current directory at that point in the path, “..” elements that reference the parent directory, and symbolic links can be reduced to a canonical form using the canonicalPath() 函数。

Paths can also be simplified by using cleanPath() to remove redundant “/” and “..” elements.

It is sometimes necessary to be able to show a path in the native representation for the user’s platform. The static toNativeSeparators() function returns a copy of the specified path in which each directory separator is replaced by the appropriate separator for the underlying operating system.

范例 ¶

Check if a directory exists:

dir = QDir("example")
if not dir.exists():
    print "Cannot find the example directory"
												

(We could also use the static convenience function exists() .)

Traversing directories and reading a file:

dir = QDir.root()                 # "/"
if not dir.cd("tmp"):             # "/tmp"
    print "Cannot find the \"/tmp\" directory"
else:
    file = QFile(dir.filePath("ex1.txt"))   # "/tmp/ex1.txt"
    if !file.open(QIODevice.ReadWrite):
        print "Cannot create the file %s" % (file.name())
												

A program that lists all the files in the current directory (excluding symbolic links), sorted by size, smallest first:

from PySide2.QtCore import QDir, QCoreApplication
import sys
app = QCoreApplication(sys.argv)
directory = QDir()
directory.setFilter(QDir.Files | QDir.Hidden | QDir.NoSymLinks)
directory.setSorting(QDir.Size | QDir.Reversed)
for entry in directory.entryInfoList():
    print "%s %s" % (entry.size(), entry.fileName())
												

另请参阅

QFileInfo QFile QFileDialog applicationDirPath() 查找文件范例

class QDir ( arg__1 ) ¶

QDir([path=””])

QDir(path, nameFilter[, sort=QDir.SortFlags(Name | IgnoreCase)[, filter=QDir.AllEntries]])

param filter

过滤器

param path

unicode

param arg__1

QDir

param nameFilter

unicode

param sort

SortFlags

构造 QDir with path path , that filters its entries by name using nameFilter and by attributes using filters . It also sorts the names using sort .

默认 nameFilter is an empty string, which excludes nothing; the default filters is AllEntries , which also means exclude nothing. The default sort is Name | IgnoreCase , i.e. sort by name case-insensitively.

若 path is an empty string, QDir uses “.” (the current directory). If nameFilter is an empty string, QDir uses the name filter “*” (all files).

注意： path need not exist.

另请参阅

exists() setPath() setNameFilters() setFilter() setSorting()

PySide2.QtCore.QDir. Filter ¶

This enum describes the filtering options available to QDir ; e.g. for entryList() and entryInfoList() . The filter value is specified by combining values from the following list using the bitwise OR operator:

常量	描述
QDir.Dirs	List directories that match the filters.
QDir.AllDirs	List all directories; i.e. don’t apply the filters to directory names.
QDir.Files	List files.
QDir.Drives	List disk drives (ignored under Unix).
QDir.NoSymLinks	Do not list symbolic links (ignored by operating systems that don’t support symbolic links).
QDir.NoDotAndDotDot	Do not list the special entries “.” and “..”.
QDir.NoDot	Do not list the special entry “.”.
QDir.NoDotDot	Do not list the special entry “..”.
QDir.AllEntries	List directories, files, drives and symlinks (this does not list broken symlinks unless you specify System).
QDir.Readable	List files for which the application has read access. The Readable value needs to be combined with Dirs or Files.
QDir.Writable	List files for which the application has write access. The Writable value needs to be combined with Dirs or Files.
QDir.Executable	List files for which the application has execute access. The Executable value needs to be combined with Dirs or Files.
QDir.Modified	Only list files that have been modified (ignored on Unix).
QDir.Hidden	List hidden files (on Unix, files starting with a “.”).
QDir.System	List system files (on Unix, FIFOs, sockets and device files are included; on Windows, .lnk files are included)
QDir.CaseSensitive	The filter should be case sensitive.

Functions that use Filter enum values to filter lists of files and directories will include symbolic links to files and directories unless you set the value.

A default constructed QDir will not filter out files based on their permissions, so entryList() and entryInfoList() will return all files that are readable, writable, executable, or any combination of the three. This makes the default easy to write, and at the same time useful.

For example, setting the Readable , 可写 ，和 文件 flags allows all files to be listed for which the application has read access, write access or both. If the Dirs and Drives flags are also included in this combination then all drives, directories, all files that the application can read, write, or execute, and symlinks to such files/directories can be listed.

To retrieve the permissons for a directory, use the entryInfoList() function to get the associated QFileInfo objects and then use the QFileInfo::permissons() to obtain the permissions and ownership for each file.

PySide2.QtCore.QDir. SortFlag ¶

This enum describes the sort options available to QDir , e.g. for entryList() and entryInfoList() . The sort value is specified by OR-ing together values from the following list:

常量	描述
QDir.Name	Sort by name.
QDir.Time	Sort by time (modification time).
QDir.Size	Sort by file size.
QDir.Type	Sort by file type (extension).
QDir.Unsorted	Do not sort.
QDir.NoSort	Not sorted by default.
QDir.DirsFirst	Put the directories first, then the files.
QDir.DirsLast	Put the files first, then the directories.
QDir.Reversed	Reverse the sort order.
QDir.IgnoreCase	Sort case-insensitively.
QDir.LocaleAware	Sort items appropriately using the current locale settings.

You can only specify one of the first four.

If you specify both and Reversed, directories are still put first, but in reverse order; the files will be listed after the directories, again in reverse order.

PySide2.QtCore.QDir. __reduce__ ( ) ¶

返回类型

PyObject

PySide2.QtCore.QDir. absoluteFilePath ( fileName ) ¶

参数

fileName – unicode

返回类型

unicode

Returns the absolute path name of a file in the directory. Does not check if the file actually exists in the directory; but see exists() . Redundant multiple separators or “.” and “..” directories in fileName are not removed (see cleanPath() ).

另请参阅

relativeFilePath() filePath() canonicalPath()

PySide2.QtCore.QDir. absolutePath ( ) ¶

返回类型

unicode

Returns the absolute path (a path that starts with “/” or with a drive specification), which may contain symbolic links, but never contains redundant “.”, “..” or multiple separators.

另请参阅

setPath() canonicalPath() exists() cleanPath() dirName() absoluteFilePath()

static PySide2.QtCore.QDir. addResourceSearchPath ( path ) ¶

参数

path – unicode

注意

此函数被弃用。

使用 addSearchPath() with a prefix instead.

添加 path to the search paths searched in to find resources that are not specified with an absolute path. The default search path is to search only in the root ( :/ ).

另请参阅

Qt 资源系统

static PySide2.QtCore.QDir. addSearchPath ( prefix , path ) ¶

参数

• prefix – unicode

• path – unicode

添加 path to the search path for prefix .

另请参阅

setSearchPaths()

PySide2.QtCore.QDir. canonicalPath ( ) ¶

返回类型

unicode

Returns the canonical path, i.e. a path without symbolic links or redundant “.” or “..” elements.

On systems that do not have symbolic links this function will always return the same string that absolutePath() returns. If the canonical path does not exist (normally due to dangling symbolic links) returns an empty string.

范例：

bin = "/local/bin"         # where /local/bin is a symlink to /usr/bin
binDir = QDir(bin)
canonicalBin = binDir.canonicalPath()
# canonicalBin now equals "/usr/bin"
ls = "/local/bin/ls"       # where ls is the executable "ls"
lsDir = QDir(ls)
canonicalLs = lsDir.canonicalPath()
# canonicalLS now equals "/usr/bin/ls".
												

另请参阅

path() absolutePath() exists() cleanPath() dirName() absoluteFilePath()

PySide2.QtCore.QDir. cd ( dirName ) ¶

参数

dirName – unicode

返回类型

bool

改变 QDir ‘s directory to dirName .

返回 true 若新目录存在；否则返回 false . Note that the logical operation is not performed if the new directory does not exist.

Calling cd(“..”) is equivalent to calling cdUp() .

另请参阅

cdUp() isReadable() exists() path()

PySide2.QtCore.QDir. cdUp ( ) ¶

返回类型

bool

通过上移一目录来改变目录从 QDir ‘s current directory.

返回 true 若新目录存在；否则返回 false . Note that the logical operation is not performed if the new directory does not exist.

另请参阅

cd() isReadable() exists() path()

static PySide2.QtCore.QDir. cleanPath ( path ) ¶

参数

path – unicode

返回类型

unicode

返回 path with directory separators normalized (that is, platform-native separators converted to “/”) and redundant ones removed, and “.”s and “..”s resolved (as far as possible).

Symbolic links are kept. This function does not return the canonical path, but rather the simplest version of the input. For example, “./local” becomes “local”, “local/../bin” becomes “bin” and “/local/usr/../bin” becomes “/local/bin”.

另请参阅

absolutePath() canonicalPath()

PySide2.QtCore.QDir. count ( ) ¶

返回类型

uint

Returns the total number of directories and files in the directory.

相当于 entryList() ..

另请参阅

operator[]() entryList()

static PySide2.QtCore.QDir. current ( ) ¶

返回类型

QDir

Returns the application’s current directory.

The directory is constructed using the absolute path of the current directory, ensuring that its path() will be the same as its absolutePath() .

另请参阅

currentPath() setCurrent() home() root() temp()

static PySide2.QtCore.QDir. currentPath ( ) ¶

返回类型

unicode

Returns the absolute path of the application’s current directory. The current directory is the last directory set with setCurrent() or, if that was never called, the directory at which this application was started at by the parent process.

另请参阅

current() setCurrent() homePath() rootPath() tempPath() applicationDirPath()

PySide2.QtCore.QDir. dirName ( ) ¶

返回类型

unicode

Returns the name of the directory; this is not the same as the path, e.g. a directory with the name “mail”, might have the path “/var/spool/mail”. If the directory has no name (e.g. it is the root directory) an empty string is returned.

No check is made to ensure that a directory with this name actually exists; but see exists() .

另请参阅

path() filePath() absolutePath() absoluteFilePath()

static PySide2.QtCore.QDir. drives ( ) ¶

返回类型

Returns a list of the root directories on this system.

On Windows this returns a list of QFileInfo objects containing “C:/”, “D:/”, etc. On other operating systems, it returns a list containing just one root directory (i.e. “/”).

另请参阅

root() rootPath()

PySide2.QtCore.QDir. entryInfoList ( [ filters=QDir.NoFilter [ , sort=QDir.NoSort ] ] ) ¶

参数

• filters – 过滤器

• sort – SortFlags

返回类型

这是重载函数。

Returns a list of QFileInfo objects for all the files and directories in the directory, ordered according to the name and attribute filters previously set with setNameFilters() and setFilter() , and sorted according to the flags set with setSorting() .

The attribute filter and sorting specifications can be overridden using the filters and sort 自变量。

Returns an empty list if the directory is unreadable, does not exist, or if nothing matches the specification.

另请参阅

entryList() setNameFilters() setSorting() setFilter() isReadable() exists()

PySide2.QtCore.QDir. entryInfoList ( nameFilters [ , filters=QDir.NoFilter [ , sort=QDir.NoSort ] ] ) ¶

参数

• nameFilters – 字符串列表

• filters – 过滤器

• sort – SortFlags

返回类型

Returns a list of QFileInfo objects for all the files and directories in the directory, ordered according to the name and attribute filters previously set with setNameFilters() and setFilter() , and sorted according to the flags set with setSorting() .

The name filter, file attribute filter, and sorting specification can be overridden using the nameFilters , filters ，和 sort 自变量。

Returns an empty list if the directory is unreadable, does not exist, or if nothing matches the specification.

另请参阅

entryList() setNameFilters() setSorting() setFilter() isReadable() exists()

PySide2.QtCore.QDir. entryList ( [ filters=QDir.NoFilter [ , sort=QDir.NoSort ] ] ) ¶

参数

• filters – 过滤器

• sort – SortFlags

返回类型

字符串列表

这是重载函数。

Returns a list of the names of all the files and directories in the directory, ordered according to the name and attribute filters previously set with setNameFilters() and setFilter() , and sorted according to the flags set with setSorting() .

The attribute filter and sorting specifications can be overridden using the filters and sort 自变量。

Returns an empty list if the directory is unreadable, does not exist, or if nothing matches the specification.

注意

To list symlinks that point to non existing files, 系统 must be passed to the filter.

另请参阅

entryInfoList() setNameFilters() setSorting() setFilter()

PySide2.QtCore.QDir. entryList ( nameFilters [ , filters=QDir.NoFilter [ , sort=QDir.NoSort ] ] ) ¶

参数

• nameFilters – 字符串列表

• filters – 过滤器

• sort – SortFlags

返回类型

字符串列表

Returns a list of the names of all the files and directories in the directory, ordered according to the name and attribute filters previously set with setNameFilters() and setFilter() , and sorted according to the flags set with setSorting() .

The name filter, file attribute filter, and sorting specification can be overridden using the nameFilters , filters ，和 sort 自变量。

Returns an empty list if the directory is unreadable, does not exist, or if nothing matches the specification.

另请参阅

entryInfoList() setNameFilters() setSorting() setFilter()

PySide2.QtCore.QDir. exists ( ) ¶

返回类型

bool

这是重载函数。

返回 true if the directory exists; otherwise returns false . (If a file with the same name is found this function will return false).

The overload of this function that accepts an argument is used to test for the presence of files and directories within a directory.

另请参阅

exists() exists()

PySide2.QtCore.QDir. exists ( name ) ¶

参数

name – unicode

返回类型

bool

返回 true if the file called name exists; otherwise returns false.

除非 name contains an absolute file path, the file name is assumed to be relative to the directory itself, so this function is typically used to check for the presence of files within a directory.

另请参阅

exists() exists()

PySide2.QtCore.QDir. filePath ( fileName ) ¶

参数

fileName – unicode

返回类型

unicode

Returns the path name of a file in the directory. Does not check if the file actually exists in the directory; but see exists() 。若 QDir is relative the returned path name will also be relative. Redundant multiple separators or “.” and “..” directories in fileName are not removed (see cleanPath() ).

另请参阅

dirName() absoluteFilePath() isRelative() canonicalPath()

PySide2.QtCore.QDir. filter ( ) ¶

返回类型

过滤器

Returns the value set by setFilter()

另请参阅

setFilter()

static PySide2.QtCore.QDir. fromNativeSeparators ( pathName ) ¶

参数

pathName – unicode

返回类型

unicode

返回 pathName using ‘/’ as file separator. On Windows, for instance, (“ c:\\winnt\\system32 “) returns “c:/winnt/system32”.

The returned string may be the same as the argument on some operating systems, for example on Unix.

另请参阅

toNativeSeparators() separator()

static PySide2.QtCore.QDir. home ( ) ¶

返回类型

QDir

Returns the user’s home directory.

The directory is constructed using the absolute path of the home directory, ensuring that its path() will be the same as its absolutePath() .

见 homePath() 了解细节。

另请参阅

drives() current() root() temp()

static PySide2.QtCore.QDir. homePath ( ) ¶

返回类型

unicode

Returns the absolute path of the user’s home directory.

Under Windows this function will return the directory of the current user’s profile. Typically, this is:

C:/Documents and Settings/Username
												

使用 toNativeSeparators() function to convert the separators to the ones that are appropriate for the underlying operating system.

If the directory of the current user’s profile does not exist or cannot be retrieved, the following alternatives will be checked (in the given order) until an existing and available path is found:

1. The path specified by the USERPROFILE 环境变量。

2. The path formed by concatenating the HOMEDRIVE and HOMEPATH environment variables.

3. The path specified by the HOME 环境变量。

4. The path returned by the rootPath() function (which uses the SystemDrive environment variable)

5. C:/ 目录。

Under non-Windows operating systems the HOME environment variable is used if it exists, otherwise the path returned by the rootPath() .

另请参阅

home() currentPath() rootPath() tempPath()

PySide2.QtCore.QDir. isAbsolute ( ) ¶

返回类型

bool

返回 true if the directory’s path is absolute; otherwise returns false 。见 isAbsolutePath() .

另请参阅

isRelative() makeAbsolute() cleanPath()

static PySide2.QtCore.QDir. isAbsolutePath ( path ) ¶

参数

path – unicode

返回类型

bool

返回 true if path is absolute; returns false if it is relative.

另请参阅

isAbsolute() isRelativePath() makeAbsolute() cleanPath()

PySide2.QtCore.QDir. isEmpty ( [ filters=QDir.Filters(AllEntries | NoDotAndDotDot) ] ) ¶

参数

filters – 过滤器

返回类型

bool

Returns whether the directory is empty.

相当于 count() == 0 with filters QDir::AllEntries | QDir::NoDotAndDotDot , but faster as it just checks whether the directory contains at least one entry.

注意

Unless you set the filters flags to include QDir::NoDotAndDotDot (as the default value does), no directory is empty.

另请参阅

count() entryList() setFilter()

PySide2.QtCore.QDir. isReadable ( ) ¶

返回类型

bool

返回 true if the directory is readable and we can open files by name; otherwise returns false .

警告

A false value from this function is not a guarantee that files in the directory are not accessible.

另请参阅

isReadable()

PySide2.QtCore.QDir. isRelative ( ) ¶

返回类型

bool

返回 true if the directory path is relative; otherwise returns false. (Under Unix a path is relative if it does not start with a “/”).

另请参阅

makeAbsolute() isAbsolute() isAbsolutePath() cleanPath()

static PySide2.QtCore.QDir. isRelativePath ( path ) ¶

参数

path – unicode

返回类型

bool

返回 true if path is relative; returns false if it is absolute.

另请参阅

isRelative() isAbsolutePath() makeAbsolute()

PySide2.QtCore.QDir. isRoot ( ) ¶

返回类型

bool

返回 true if the directory is the root directory; otherwise returns false .

Note: If the directory is a symbolic link to the root directory this function returns false . If you want to test for this use canonicalPath() ，如

dir = QDir("/tmp/root_link")
dir = dir.canonicalPath()
if dir.isRoot():
    print "It is a root link"
												

另请参阅

root() rootPath()

static PySide2.QtCore.QDir. listSeparator ( ) ¶

返回类型

QChar

Returns the native path list separator: ‘:’ under Unix and ‘;’ under Windows.

另请参阅

separator()

PySide2.QtCore.QDir. makeAbsolute ( ) ¶

返回类型

bool

Converts the directory path to an absolute path. If it is already absolute nothing happens. Returns true if the conversion succeeded; otherwise returns false .

另请参阅

isAbsolute() isAbsolutePath() isRelative() cleanPath()

static PySide2.QtCore.QDir. match ( filters , fileName ) ¶

参数

• filters – 字符串列表

• fileName – unicode

返回类型

bool

static PySide2.QtCore.QDir. match ( filter , fileName ) ¶

参数

• filter – unicode

• fileName – unicode

返回类型

bool

PySide2.QtCore.QDir. mkdir ( dirName ) ¶

参数

dirName – unicode

返回类型

bool

Creates a sub-directory called dirName .

返回 true 当成功时；否则返回 false .

If the directory already exists when this function is called, it will return false.

另请参阅

rmdir()

PySide2.QtCore.QDir. mkpath ( dirPath ) ¶

参数

dirPath – unicode

返回类型

bool

Creates the directory path dirPath .

The function will create all parent directories necessary to create the directory.

返回 true 若成功；否则返回 false .

If the path already exists when this function is called, it will return true.

另请参阅

rmpath()

PySide2.QtCore.QDir. nameFilters ( ) ¶

返回类型

字符串列表

Returns the string list set by setNameFilters()

另请参阅

setNameFilters()

static PySide2.QtCore.QDir. nameFiltersFromString ( nameFilter ) ¶

参数

nameFilter – unicode

返回类型

字符串列表

Returns a list of name filters from the given nameFilter . (If there is more than one filter, each pair of filters is separated by a space or by a semicolon.)

PySide2.QtCore.QDir. __ne__ ( dir ) ¶

参数

dir – QDir

返回类型

bool

返回 true if directory dir and this directory have different paths or different sort or filter settings; otherwise returns false.

范例：

// The current directory is "/usr/local"
d1 = QDir("/usr/local/bin")
d1.setFilter(QDir.Executable)
d2 = QDir("bin")
if d1 != d2:
    print "They differ"
												

PySide2.QtCore.QDir.operator=(path)

参数

path – unicode

返回类型

QDir

注意

此函数被弃用。

PySide2.QtCore.QDir. __eq__ ( dir ) ¶

参数

dir – QDir

返回类型

bool

返回 true if directory dir and this directory have the same path and their sort and filter settings are the same; otherwise returns false .

范例：

# The current directory is "/usr/local"
d1 = QDir("/usr/local/bin")
d2 = QDir("bin")
if d1 == d2:
    print "They're the same"
												

PySide2.QtCore.QDir.operator[](arg__1)

参数

arg__1 – int

返回类型

unicode

Returns the file name at position pos in the list of file names. Equivalent to entryList() .at(index). pos must be a valid index position in the list (i.e., 0 <= pos < count() ).

另请参阅

count() entryList()

PySide2.QtCore.QDir. path ( ) ¶

返回类型

unicode

Returns the path. This may contain symbolic links, but never contains redundant “.”, “..” or multiple separators.

The returned path can be either absolute or relative (see setPath() ).

另请参阅

setPath() absolutePath() exists() cleanPath() dirName() absoluteFilePath() toNativeSeparators() makeAbsolute()

PySide2.QtCore.QDir. refresh ( ) ¶

Refreshes the directory information.

PySide2.QtCore.QDir. relativeFilePath ( fileName ) ¶

参数

fileName – unicode

返回类型

unicode

Returns the path to fileName relative to the directory.

dir = QDir("/home/bob")
s = dir.relativeFilePath("images/file.jpg")         # s is "images/file.jpg"
s = dir.relativeFilePath("/home/mary/file.txt")     # s is "../mary/file.txt"
												

另请参阅

absoluteFilePath() filePath() canonicalPath()

PySide2.QtCore.QDir. remove ( fileName ) ¶

参数

fileName – unicode

返回类型

bool

Removes the file, fileName .

返回 true if the file is removed successfully; otherwise returns false .

PySide2.QtCore.QDir. removeRecursively ( ) ¶

返回类型

bool

Removes the directory, including all its contents.

返回 true if successful, otherwise false.

If a file or directory cannot be removed, keeps going and attempts to delete as many files and sub-directories as possible, then returns false .

If the directory was already removed, the method returns true (expected result already reached).

Note: this function is meant for removing a small application-internal directory (such as a temporary directory), but not user-visible directories. For user-visible operations, it is rather recommended to report errors more precisely to the user, to offer solutions in case of errors, to show progress during the deletion since it could take several minutes, etc.

PySide2.QtCore.QDir. rename ( oldName , newName ) ¶

参数

• oldName – unicode

• newName – unicode

返回类型

bool

Renames a file or directory from oldName to newName , and returns true if successful; otherwise returns false .

On most file systems, fails only if oldName does not exist, or if a file with the new name already exists. However, there are also other reasons why can fail. For example, on at least one file system fails if newName points to an open file.

若 oldName is a file (not a directory) that can’t be renamed right away, Qt will try to copy oldName to newName and remove oldName .

另请参阅

rename()

PySide2.QtCore.QDir. rmdir ( dirName ) ¶

参数

dirName – unicode

返回类型

bool

Removes the directory specified by dirName .

The directory must be empty for to succeed.

返回 true 若成功；否则返回 false .

另请参阅

mkdir()

PySide2.QtCore.QDir. rmpath ( dirPath ) ¶

参数

dirPath – unicode

返回类型

bool

Removes the directory path dirPath .

The function will remove all parent directories in dirPath , provided that they are empty. This is the opposite of mkpath(dirPath).

返回 true 若成功；否则返回 false .

另请参阅

mkpath()

static PySide2.QtCore.QDir. root ( ) ¶

返回类型

QDir

Returns the root directory.

The directory is constructed using the absolute path of the root directory, ensuring that its path() will be the same as its absolutePath() .

见 rootPath() 了解细节。

另请参阅

drives() current() home() temp()

static PySide2.QtCore.QDir. rootPath ( ) ¶

返回类型

unicode

Returns the absolute path of the root directory.

For Unix operating systems this returns “/”. For Windows file systems this normally returns “c:/”.

另请参阅

root() drives() currentPath() homePath() tempPath()

static PySide2.QtCore.QDir. searchPaths ( prefix ) ¶

参数

prefix – unicode

返回类型

字符串列表

Returns the search paths for prefix .

另请参阅

setSearchPaths() addSearchPath()

static PySide2.QtCore.QDir. separator ( ) ¶

返回类型

QChar

Returns the native directory separator: “/” under Unix and “\” under Windows.

You do not need to use this function to build file paths. If you always use “/”, Qt will translate your paths to conform to the underlying operating system. If you want to display paths to the user using their operating system’s separator use toNativeSeparators() .

另请参阅

listSeparator()

static PySide2.QtCore.QDir. setCurrent ( path ) ¶

参数

path – unicode

返回类型

bool

Sets the application’s current working directory to path 。返回 true if the directory was successfully changed; otherwise returns false .

另请参阅

current() currentPath() home() root() temp()

PySide2.QtCore.QDir. setFilter ( filter ) ¶

参数

filter – 过滤器

Sets the filter used by entryList() and entryInfoList() to filters . The filter is used to specify the kind of files that should be returned by entryList() and entryInfoList() 。见 Filter .

另请参阅

filter() setNameFilters()

PySide2.QtCore.QDir. setNameFilters ( nameFilters ) ¶

参数

nameFilters – 字符串列表

Sets the name filters used by entryList() and entryInfoList() to the list of filters specified by nameFilters .

Each name filter is a wildcard (globbing) filter that understands * and ? wildcards. See QRegularExpression Wildcard Matching .

For example, the following code sets three name filters on a QDir to ensure that only files with extensions typically used for C++ source files are listed:

filters = ["*.cpp", "*.cxx", "*.cc"]
dir_.setNameFilters(filters)
												

另请参阅

nameFilters() setFilter()

PySide2.QtCore.QDir. setPath ( path ) ¶

参数

path – unicode

Sets the path of the directory to path . The path is cleaned of redundant “.”, “..” and of multiple separators. No check is made to see whether a directory with this path actually exists; but you can check for yourself using exists() .

The path can be either absolute or relative. Absolute paths begin with the directory separator “/” (optionally preceded by a drive specification under Windows). Relative file names begin with a directory name or a file name and specify a path relative to the current directory. An example of an absolute path is the string “/tmp/quartz”, a relative path might look like “src/fatlib”.

另请参阅

path() absolutePath() exists() cleanPath() dirName() absoluteFilePath() isRelative() makeAbsolute()

static PySide2.QtCore.QDir. setSearchPaths ( prefix , searchPaths ) ¶

参数

• prefix – unicode

• searchPaths – 字符串列表

Sets or replaces Qt’s search paths for file names with the prefix prefix to searchPaths .

To specify a prefix for a file name, prepend the prefix followed by a single colon (e.g., “images:undo.png”, “xmldocs:books.xml”). prefix can only contain letters or numbers (e.g., it cannot contain a colon, nor a slash).

Qt uses this search path to locate files with a known prefix. The search path entries are tested in order, starting with the first entry.

QDir.setSearchPaths("icons", [QDir.homePath() + "/images"])
QDir.setSearchPaths("docs", [":/embeddedDocuments"])
...
pixmap = QPixmap("icons:undo.png")  # will look for undo.png in QDir::homePath() + "/images"
file = QFile("docs:design.odf")     # will look in the :/embeddedDocuments resource path
												

File name prefix must be at least 2 characters long to avoid conflicts with Windows drive letters.

Search paths may contain paths to Qt 资源系统 .

另请参阅

searchPaths()

PySide2.QtCore.QDir. setSorting ( sort ) ¶

参数

sort – SortFlags

Sets the sort order used by entryList() and entryInfoList() .

sort is specified by OR-ing values from the enum SortFlag .

另请参阅

sorting() SortFlag

PySide2.QtCore.QDir. sorting ( ) ¶

返回类型

SortFlags

Returns the value set by setSorting()

另请参阅

setSorting() SortFlag

PySide2.QtCore.QDir. swap ( other ) ¶

参数

other – QDir

交换此 QDir 实例与 other 。此函数非常快，且从不失败。

static PySide2.QtCore.QDir. temp ( ) ¶

返回类型

QDir

Returns the system’s temporary directory.

The directory is constructed using the absolute canonical path of the temporary directory, ensuring that its path() will be the same as its absolutePath() .

见 tempPath() 了解细节。

另请参阅

drives() current() home() root()

static PySide2.QtCore.QDir. tempPath ( ) ¶

返回类型

unicode

Returns the absolute canonical path of the system’s temporary directory.

On Unix/Linux systems this is the path in the TMPDIR environment variable or /tmp if TMPDIR is not defined. On Windows this is usually the path in the TEMP or TMP environment variable. The path returned by this method doesn’t end with a directory separator unless it is the root directory (of a drive).

另请参阅

temp() currentPath() homePath() rootPath()

static PySide2.QtCore.QDir. toNativeSeparators ( pathName ) ¶

参数

pathName – unicode

返回类型

unicode

返回 pathName with the ‘/’ separators converted to separators that are appropriate for the underlying operating system.

On Windows, (“c:/winnt/system32”) returns “c:\winnt\system32”.

The returned string may be the same as the argument on some operating systems, for example on Unix.

另请参阅

fromNativeSeparators() separator()