Error when upload a file

[tbob77]

File "/usr/local/lib/python2.7/dist-packages/verystream/verystream.py", line 264, in upload_file
headers = {"Content-Type": data.content_type}
NameError: global name 'data' is not defined

The content of my script:

from verystream import Verystream

vs = Verystream('Mylogin', 'Mykey')

uploaded_file_info = vs.upload_file('/tmp/file.txt')
print(uploaded_file_info)

File info and Account info requests are working OK!