Python socket.error:[Errno 32]管道断裂错误

当我运行Virustotal提供的代码时，出现以下错误：

socket.error: [Errno 32] Broken pipe error

我对Python很幼稚，任何帮助都将不胜感激

import postfile
host = "www.virustotal.com"
selector = "https://www.virustotal.com/vtapi/v2/file/scan"
fields = [("apikey", "1fe0ef5feca2f84eb450bc3617f839e317b2a686af4d651a9bada77a522201b0")]
file_to_send = open("test.txt", "rb").read()
files = [("file", "test.txt", file_to_send)]
json = postfile.post_multipart(host, selector, fields, files)
print json

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这意味着您正在写入另一端已关闭的连接。如何修复它？此

postfile

模块是什么？对于postfile：