Package: talon-v3
Mailgun library to extract message quotations and signatures.If you ever tried to parse message quotations or signatures you know that absence of any formatting standards in this area could make this task a nightmare. Hopefully this library will make your life much easier. The name of the project is inspired by TALON - multipurpose robot designed to perform missions ranging from reconnaissance to combat and operate in a number of hostile environments. That’s what a good quotations and signature parser should be like :smile:UsageHere’s how you initialize the library and extract a reply from a text
message:importtalonfromtalonimportquotationstalon.init()text="""Reply

-----Original Message-----

Quote"""reply=quotations.extract_from(text,'text/plain')reply=quotations.extract_from_plain(text)# reply == "Reply"To extract a reply from html:html="""Reply
<blockquote>

  <div>
    On 11-Apr-2011, at 6:54 PM, Bob &lt;bob@example.com&gt; wrote:
  </div>

  <div>
    Quote
  </div>

</blockquote>"""reply=quotations.extract_from(html,'text/html')reply=quotations.extract_from_html(html)# reply == "<html><body><p>Reply</p></body></html>"Often the best way is the easiest one. Here’s how you can extract
signature from email message without any
machine learning fancy stuff:fromtalon.signature.bruteforceimportextract_signaturemessage="""Wow. Awesome!
--
Bob Smith"""text,signature=extract_signature(message)# text == "Wow. Awesome!"# signature == "--\nBob Smith"Quick and works like a charm 90% of the time. For other 10% you can use
the power of machine learning algorithms:importtalon# don't forget to init the library first# it loads machine learning classifierstalon.init()fromtalonimportsignaturemessage="""Thanks Sasha, I can't go any higher and is why I limited it to the
homepage.

John Doe
via mobile"""text,signature=signature.extract(message,sender='john.doe@example.com')# text == "Thanks Sasha, I can't go any higher and is why I limited it to the\nhomepage."# signature == "John Doe\nvia mobile"For machine learning talon currently uses thescikit-learnlibrary to build SVM
classifiers. The core of machine learning algorithm lays intalon.signature.learning package. It defines a set of features to
apply to a message (featurespace.py), how data sets are built
(dataset.py), classifier’s interface (classifier.py).Currently the data used for training is taken from our personal email
conversations and fromENRONdataset. As a result of applying our set
of features to the dataset we provide filesclassifierandtrain.datathat don’t have any personal information but could be
used to load trained classifier. Those files should be regenerated every
time the feature/data set is changed.To regenerate the model files, you can runpythontrain.pyorfromtalon.signatureimportEXTRACTOR_FILENAME,EXTRACTOR_DATAfromtalon.signature.learning.classifierimporttrain,inittrain(init(),EXTRACTOR_DATA,EXTRACTOR_FILENAME)Open-source DatasetRecently we started aforgeproject to create an open-source, annotated dataset of raw emails. In the project we
used a subset ofENRONdata, cleansed of private, health and financial information byEDRM. At the moment over 190
emails are annotated. Any contribution and collaboration on the project are welcome. Once the dataset is ready we plan to
start using it for talon.Training on your datasettalon comes with a pre-processed dataset and a pre-trained classifier. To retrain the classifier on your own dataset of raw emails, structure and annotate them in the same way theforgeproject does. Then do:fromtalon.signature.learning.datasetimportbuild_extraction_datasetfromtalon.signature.learningimportclassifierascbuild_extraction_dataset("/path/to/your/P/folder","/path/to/talon/signature/data/train.data")c.train(c.init(),"/path/to/talon/signature/data/train.data","/path/to/talon/signature/data/classifier")Note that for signature extraction you need just the folder with the positive samples with annotated signature lines (P folder).ResearchThe library is inspired by the following research papers and projects:http://www.cs.cmu.edu/~vitor/papers/sigFilePaper_finalversion.pdfhttp://www.cs.cornell.edu/people/tj/publications/joachims_01a.pdf