Python机械化:上传UTF-8文件时UnicodeEncodeError。‘'ascii’编解码器

Question

mechanize框架非常适合自动化前几个web屏幕。问题是它需要在表单中上传文件的位置。

下面是错误之前的代码部分：

br.select_form(name="form.uploadXMLDataWizardForm")
xmlFile = codecs.open("MyFile.xml", "rt", "utf8")
br.form.add_file(file_object=xmlFile, content_type="text/xml", filename="MyFile.xml", name="dataFile")
br.submit(name="$action:next")

它会在运行时导致以下错误：

    br.submit(name="$action:next")
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_mechanize.py", line 541, in submit
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_mechanize.py", line 530, in click
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_form.py", line 2999, in click
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_form.py", line 3201, in _click
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_form.py", line 2350, in _click
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_form.py", line 3269, in _switch_click
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_form.py", line 3252, in _request_data
  File "build/bdist.macosx-10.6-universal/egg/mechanize/_form.py", line 1341, in _write_mime_data
UnicodeEncodeError: 'ascii' codec can't encode characters in position 650-651: ordinal not in range(128)

你知道怎么让mechanize处理UTF-8文件的上传吗？

Answer 1

Mechanize似乎希望文件数据是原始字节，而不是Unicode数据。尝试使用常用的open()函数打开该文件：

...
xmlFile = open("MyFile.xml", "rt")
...