sendgrid/sendgrid-python — pull request #89 by cbg (2014-10-15 18:12:32+00:00)
Title: Encode unicode object file attachment names to Python str objects

Currently, the method sendgrid.message.Mail.add_attachment_stream encodes unicode object filenames to Python str objects. However, the method sendgrid.message.Mail.add_attachment does not do the same encoding. This commit fixes that.