使用 Python 获取文件的 mimetype

Question

我想确定一个 xml 文件的 mimetype，但我收到关于某些实例作为第一个参数的错误。我是python新手，请帮忙。以下是我正在使用的代码及其引发的错误。

from mimetypes import MimeTypes
import urllib 
FILENAME = 'Upload.xml'
url = urllib.pathname2url(FILENAME)
type = MimeTypes.guess_type(url)
print type

**ERROR :** Traceback (most recent call last):
File "/home/navi/Desktop/quicksort.py", line 20, in <module>
type = MimeTypes.guess_type(url)
TypeError: unbound method guess_type() must be called with MimeTypes instance as first argument (got str instance instead)

Answer 1

错误说你必须初始化MimeTypes类：

>>> from mimetypes import MimeTypes
>>> import urllib 
>>> 
>>> mime = MimeTypes()
>>> url = urllib.pathname2url('Upload.xml')
>>> mime_type = mime.guess_type(url)
>>> 
>>> print mime_type
('application/xml', None)

虽然你可以跳过这个并直接使用mimetypes.guess_type：

>>> import urllib, mimetypes
>>> 
>>> url = urllib.pathname2url('Upload.xml')
>>> print mimetypes.guess_type(url)
('application/xml', None)