Text Mining and Topic Modeling Toolkit
Project description
tmtoolkit: Text mining and topic modeling toolkit
tmtoolkit is a set of tools for text mining and topic modeling with Python developed especially for the use in the social sciences, in journalism or related disciplines. It aims for easy installation, extensive documentation and a clear programming interface while offering good performance on large datasets by the means of vectorized operations (via NumPy) and parallel computation (using Python’s multiprocessing module and the loky package). The basis of tmtoolkit’s text mining capabilities are built around SpaCy, which offers a many language models.
The documentation for tmtoolkit is available on tmtoolkit.readthedocs.org and the GitHub code repository is on github.com/WZBSocialScienceCenter/tmtoolkit.
Features
Text preprocessing
The tmtoolkit package offers several text preprocessing and text mining methods, including:
tokenization, sentence segmentation, part-of-speech (POS) tagging, named-entity recognition (NER) (via SpaCy)
extensive pattern matching capabilities (exact matching, regular expressions or “glob” patterns) to be used in many methods of the package, e.g. for filtering on token or document level, or for keywords-in-context (KWIC)
adding and managing custom document and token attributes
accessing text corpora along with their document and token attributes as dataframes
calculating and visualizing corpus summary statistics
finding out and joining collocations
generating n-grams
generating sparse document-term matrices
Wherever possible and useful, these methods can operate in parallel to speed up computations with large datasets.
Topic modeling
model computation in parallel for different copora and/or parameter sets
support for lda, scikit-learn and gensim topic modeling backends
evaluation of topic models (e.g. in order to an optimal number of topics for a given dataset) using several implemented metrics:
model coherence (Mimno et al. 2011) or with metrics implemented in Gensim)
KL divergence method (Arun et al. 2010)
probability of held-out documents (Wallach et al. 2009)
pair-wise cosine distance method (Cao Juan et al. 2009)
harmonic mean method (Griffiths, Steyvers 2004)
the loglikelihood or perplexity methods natively implemented in lda, sklearn or gensim
common statistics for topic models such as word saliency and distinctiveness (Chuang et al. 2012), topic-word relevance (Sievert and Shirley 2014)
export estimated document-topic and topic-word distributions to Excel
visualize topic-word distributions and document-topic distributions as word clouds or heatmaps
model coherence (Mimno et al. 2011) for individual topics
integrate PyLDAVis to visualize results
Other features
loading and cleaning of raw text from text files, tabular files (CSV or Excel), ZIP files or folders
common statistics and transformations for document-term matrices like word cooccurrence and tf-idf
Limits
all languages are supported, for which SpaCy language models are available
all data must reside in memory, i.e. no streaming of large data from the hard disk (which for example Gensim supports)
Requirements and installation
For requirements and installation procedures, please have a look at the installation section in the documentation.
License
Code licensed under Apache License 2.0. See LICENSE file.
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