imghdr — 确定图像类型 ¶

源代码： Lib/imghdr.py

imghdr 模块确定文件或字节流中包含的图像类型。

imghdr 模块定义以下函数：

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.

3.6 版改变： 接受 像路径对象 .

The following image types are recognized, as listed below with the return value from what() :

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 be None .

The test function should return a string describing the image type if the test succeeded, or None if it failed.

范例：

>>> import imghdr
>>> imghdr.what('bass.gif')
'gif'
							

上一话题

colorsys — 在颜色系统之间转换

下一话题

sndhdr — 确定声音文件类型