QMimeType

The QMimeType class describes types of file or data, represented by a MIME type string. More…

Inheritance diagram of PySide2.QtCore.QMimeType

New in version 5.0.

Synopsis

Functions

Detailed Description

For instance a file named “readme.txt” has the MIME type “text/plain”. The MIME type can be determined from the file name, or from the file contents, or from both. MIME type determination can also be done on buffers of data not coming from files.

Determining the MIME type of a file can be useful to make sure your application supports it. It is also useful in file-manager-like applications or widgets, in order to display an appropriate icon for the file, or even the descriptive comment in detailed views.

To check if a file has the expected MIME type, you should use inherits() rather than a simple string comparison based on the name() . This is because MIME types can inherit from each other: for instance a C source file is a specific type of plain text file, so text/x-csrc inherits text/plain.

See also

QMimeDatabase MIME Type Browser Example

class PySide2.QtCore.QMimeType

PySide2.QtCore.QMimeType(other)

param other:

PySide2.QtCore.QMimeType

Constructs this QMimeType object initialized with default property values that indicate an invalid MIME type.

PySide2.QtCore.QMimeType.aliases()
Return type:

list of strings

This property holds the list of aliases of this mimetype.

For instance, for text/csv, the returned list would be: text/x-csv, text/x-comma-separated-values.

Note that all QMimeType instances refer to proper mimetypes, never to aliases directly.

The order of the aliases in the list is undefined.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.allAncestors()
Return type:

list of strings

This property holds the names of direct and indirect parent MIME types.

Return all the parent mimetypes of this mimetype, direct and indirect. This includes the parent(s) of its parent(s), etc.

For instance, for image/svg+xml the list would be: application/xml, text/plain, application/octet-stream.

Note that application/octet-stream is the ultimate parent for all types of files (but not directories).

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.comment()
Return type:

str

This property holds the description of the MIME type to be displayed on user interfaces.

The default language (QLocale(). name() ) is used to select the appropriate translation.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.filterString()
Return type:

str

This property holds a filter string usable for a file dialog.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.genericIconName()
Return type:

str

This property holds the file name of a generic icon that represents the MIME type.

This should be used if the icon returned by iconName() cannot be found on the system. It is used for categories of similar types (like spreadsheets or archives) that can use a common icon. The freedesktop.org Icon Naming Specification lists a set of such icon names.

The icon name can be given to fromTheme() in order to load the icon.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.globPatterns()
Return type:

list of strings

This property holds the list of glob matching patterns.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.iconName()
Return type:

str

This property holds the file name of an icon image that represents the MIME type.

The icon name can be given to fromTheme() in order to load the icon.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.inherits(mimeTypeName)
Parameters:

mimeTypeName – str

Return type:

bool

Returns true if this mimetype is mimeTypeName , or inherits mimeTypeName (see parentMimeTypes() ), or mimeTypeName is an alias for this mimetype.

This method has been made invokable from QML since 5.10.

PySide2.QtCore.QMimeType.isDefault()
Return type:

bool

This property holds true if this MIME type is the default MIME type which applies to all files: application/octet-stream..

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.isValid()
Return type:

bool

This property holds true if the QMimeType object contains valid data, false otherwise.

A valid MIME type has a non-empty name() . The invalid MIME type is the default-constructed QMimeType .

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.name()
Return type:

str

This property holds the name of the MIME type.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.__ne__(other)
Parameters:

other – PySide2.QtCore.QMimeType

Return type:

bool

Returns true if other does not equal this QMimeType object, otherwise returns false .

PySide2.QtCore.QMimeType.__eq__(other)
Parameters:

other – PySide2.QtCore.QMimeType

Return type:

bool

Returns true if other equals this QMimeType object, otherwise returns false . The name is the unique identifier for a mimetype, so two mimetypes with the same name, are equal.

PySide2.QtCore.QMimeType.parentMimeTypes()
Return type:

list of strings

This property holds the names of parent MIME types.

A type is a subclass of another type if any instance of the first type is also an instance of the second. For example, all image/svg+xml files are also text/xml, text/plain and application/octet-stream files. Subclassing is about the format, rather than the category of the data (for example, there is no ‘generic spreadsheet’ class that all spreadsheets inherit from). Conversely, the parent mimetype of image/svg+xml is text/xml.

A mimetype can have multiple parents. For instance application/x-perl has two parents: application/x-executable and text/plain. This makes it possible to both execute perl scripts, and to open them in text editors.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.preferredSuffix()
Return type:

str

This property holds the preferred suffix for the MIME type.

No leading dot is included, so for instance this would return “pdf” for application/pdf. The return value can be empty, for mime types which do not have any suffixes associated.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.suffixes()
Return type:

list of strings

This property holds the known suffixes for the MIME type.

No leading dot is included, so for instance this would return “jpg”, “jpeg” for image/jpeg.

While this property was introduced in 5.10, the corresponding accessor method has always been there.

PySide2.QtCore.QMimeType.swap(other)
Parameters:

other – PySide2.QtCore.QMimeType

Swaps QMimeType other with this QMimeType object.

This operation is very fast and never fails.

The method helps with the implementation of assignment operators in an exception-safe way. For more information consult More C++ Idioms - Copy-and-swap .