22.7. imghdr
— Determina o tipo de uma imagem¶
Código Fonte: Lib/imghdr.py
The imghdr
module determines the type of image contained in a file or
byte stream.
The imghdr
module defines the following function:
-
imghdr.
what
(filename, h=None)¶ Tests the image data contained in the file named by filename, and returns a string describing the image type. If optional h is provided, the filename is ignored and h is assumed to contain the byte stream to test.
Alterado na versão 3.6: Aceita um path-like object.
The following image types are recognized, as listed below with the return value
from what()
:
Valor |
Image format |
---|---|
|
SGI ImgLib Files |
|
GIF 87a and 89a Files |
|
Portable Bitmap Files |
|
Portable Graymap Files |
|
Portable Pixmap Files |
|
Arquivos TIFF |
|
Sun Raster Files |
|
X Bitmap Files |
|
JPEG data in JFIF or Exif formats |
|
BMP files |
|
Portable Network Graphics |
|
WebP files |
|
OpenEXR Files |
Novo na versão 3.5: The exr and webp formats were added.
You can extend the list of file types imghdr
can recognize by appending
to this variable:
-
imghdr.
tests
¶ A list of functions performing the individual tests. Each function takes two arguments: the byte-stream and an open file-like object. When
what()
is called with a byte-stream, the file-like object will beNone
.A função de teste deve retornar uma string descrevendo o tipo de imagem, se o teste for bem-sucedido, ou
None
, se falhar.
Exemplo:
>>> import imghdr
>>> imghdr.what('bass.gif')
'gif'