How to Preprocess Text Data with NLPre

Oct 4, 2023 | Data Science

Natural Language Preprocessing (NLPre) is a powerful library designed to help smooth out various inconsistencies in textual data. By correcting issues like random capitalization, strange hyphenations, and abbreviations, it enables cleaner and more effective natural language processing (NLP) tasks.

Understanding NLPre

Imagine you’re a chef preparing a meal. To present the dish perfectly, you first need to wash and chop the vegetables, remove any irregularities, and ensure that everything looks aesthetically pleasing. Similarly, when you’re dealing with textual data, you need to “prepare” it for processing by cleaning it up. NLPre acts as your sous-chef, helping you with the essential preprocessing tasks to make your text data more user-friendly for analysis.

Installation

To get started with NLPre, follow these simple steps to install the library:

  • For the latest release, use the command:
  • pip install nlpre
  • If you are installing the Python 3 version on Ubuntu, you may need to use:
  • sudo apt-get install libmysqlclient-dev

Getting Started with NLPre

Below is a simple example demonstrating how to utilize NLPre to preprocess your text data:

python
from nlpre import titlecaps, dedash, identify_parenthetical_phrases
from nlpre import replace_acronyms, replace_from_dictionary

text = ("LYMPHOMA SURVIVORS IN KOREA. Describe the correlates of unmet needs "
        "among non-Hodgkin lymphoma (NHL) survivors in Korea and identify "
        "NHL patients with an abnormal white blood cell count.")

ABBR = identify_parenthetical_phrases()(text)
parsers = [dedash(), titlecaps(), replace_acronyms(ABBR), 
           replace_from_dictionary(prefix='MeSH_')]
for f in parsers:
    text = f(text)
print(text)

This code will help you clean and standardize your text data by executing various functions like altering capitalization and replacing acronyms.

What’s Included?

NLPre houses a variety of useful functions for text preprocessing:

  • replace_from_dictionary: Replaces phrases from an input dictionary.
  • replace_acronyms: Replaces acronyms and abbreviations found in a document.
  • identify_parenthetical_phrases: Identifies abbreviations within parentheses.
  • dedash: Corrects incorrect hyphenation patterns.
  • titlecaps: Normalizes sentences that are written completely in uppercase.
  • url_replacement: Removes or replaces URLs within the text.

Troubleshooting

If you encounter any issues while using NLPre, consider the following troubleshooting ideas:

  • Ensure that you have installed the correct version of Python and NLPre.
  • Check for any mismatched library versions or dependencies that might cause issues.
  • Enable logging to DEBUG or INFO level to see detailed process logs:
  • python
    import nlpre, logging
    nlpre.logger.setLevel(logging.INFO)
    
  • For more insights, updates, or to collaborate on AI development projects, stay connected with fxis.ai.

Conclusion

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.

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