
Explore natural language processing and text data pre-processing within data science and machine learning, and learn how computers interpret sentences, translate languages, and identify words and their parts of speech.
Explore how natural language processing unlocks language ai by powering voice-enabled systems and digital assistants through cloud and multicore computing, guided by graduate attributes for language interpretation and decision making.
Explore core NLP topics from pre-processing and vectorization to text classification, summarization, and movie recommendation systems, with a focus on English language processing and essential libraries.
Explore why natural language processing matters today through chatbots and voice assistants like Siri, and see how Alan Turing’s legacy relates to its origins and uses such as WhatsApp bots.
Explore essential Python libraries for natural language processing, including NLTK, spaCy, TextBlob, Gensim, Transformers, and Stanford NLP, and learn how regex and Pattern enable vectorization, classification, and regression tasks.
Learn to install and import the re library, then use match, search, and sub to apply regular expressions with raw strings and character classes.
Explore using the regular expressions library for data cleaning, handling non-word characters, digits retention, and space compression by substituting with a null string.
Learn how tokenization in NLP uses the NLTK library to convert text into tokens, using word tokenize and sentence tokenize to handle paragraphs and sentences.
Compare stemming and lemmatization, noting that stemming ignores context and is faster, while lemmatization uses context and part of speech, aided in Python by NLTK stemmers and lemmatizers with WordNet.
Learn the key pre-processing steps for nlp, including converting to lowercase, removing punctuation with string methods and regex, and detecting language with lang detect.
Explore tf-idf based vectorization to convert text into meaningful document vectors by computing term frequency and inverse document frequency, with smoothing to prevent zero values.
Explore n-gram models in NLP, from one-grams to three-grams, and learn how bag-of-words vectorization creates feature columns for documents.
Explore one-gram, two-gram, and three-gram models with bag-of-words and tf-idf features for document classification tasks like spam filtering, emotion detection, and sentiment classification, based on within-sentence sequences.
Learn how to use the wordnet lemmatizer and porter stemmer in Python to obtain root words. Compare stemming and lemmatization and explore wordnet and sentiwordnet dictionaries with nltk.
Explore tokenizing text with nltk in python, using nltk.word_tokenize to convert a document into a list of words, and prepare for stopwords removal.
Learn to remove stop words in Python using NLTK by filtering words against the English stopword list, and ensure case-insensitive removal with lowercasing.
Discover how count vectorizer turns text into numbers using n-grams, from unigrams to bigrams, via sklearn's feature extraction and get_feature_names_out. Build a numeric feature matrix ready for sentiment analysis models.
Apply tf-idf vectorization and compare with countvectorizer. Learn term frequency and inverse document frequency, and see how tf-idf values emphasize important terms with fit and transform.
Explore different tokenization methods in NLP using NLTK, including sentence tokenize and word tokenize, and see how their outputs enable pre-processing and TF-IDF vectorization with sklearn for model building.
Explore stemming and lemmatization with NLTK by tokenizing text, extracting root words, and reconstructing processed sentences to compare outcomes and observe lowercased, normalized language.
Explore the Python re library for patterns involving emails and digits, compare match and search for first or all occurrences, and apply anchors and quantifiers like dot plus and caret.
Explore finding all matches with Python's findall method to extract words, digits, and whitespace, apply regex like \d+ for numbers, and use split to identify sentences.
Learn to define an email address pattern by listing allowed characters (letters, digits, symbols), including the at sign and at least three following characters, for pre-processing and vectorization.
Do you ever wonder how your favorite search engine understands exactly what you’re looking for, or how virtual assistants like Siri and Alexa comprehend your voice commands? Welcome to the fascinating world of Natural Language Processing (NLP), where machines are trained to understand and interact with human language.
Imagine Sarah, a budding data scientist, who has always been intrigued by how algorithms can make sense of human language. She dreams of creating applications that can summarize articles, translate languages, and even analyze sentiment from social media posts. But every time she starts learning NLP, she feels overwhelmed by the vast array of techniques and tools. Does this sound familiar to you?
In this comprehensive course on Natural Language Processing with Python, we take you on a journey from the basics to the advanced applications of NLP, guiding you every step of the way. Whether you’re a beginner like Sarah or an experienced programmer looking to dive deeper into NLP, this course is designed to equip you with the skills and knowledge you need to succeed.
Section 1: Introduction to NLP
We begin with the fundamentals, ensuring you understand what NLP is and why it’s crucial in today’s world. You’ll explore the history of NLP and discover its numerous applications, from chatbots to automated translations and beyond.
Section 2: Core Concepts and Techniques
Next, we delve into the core concepts and techniques of NLP. You’ll learn about different machine learning variations in NLP and how to work with sample datasets. We cover essential Python libraries such as NLTK and demonstrate their use in NLP projects. Additionally, you’ll master regular expressions (Re) for data cleaning, a critical step in preparing your text data for analysis.
Section 3: Data Preprocessing
Effective NLP starts with clean data. In this section, we cover the data preprocessing techniques you’ll need. You’ll learn about tokenization, the process of breaking down text into meaningful units, and explore the differences between stemming and lemmatization. We guide you through the entire data cleaning process, ensuring you’re well-prepared to tackle any dataset.
Section 4: N-grams and Language Models
Understanding and implementing N-grams is crucial for many NLP applications. Here, we explain what N-grams are and their role in language modeling. You’ll also learn to use NLTK for creating and working with N-grams, building a strong foundation for more advanced NLP models.
Section 5: Advanced NLP Techniques
Moving beyond the basics, we introduce you to advanced NLP techniques such as TF-IDF, Word Embeddings, and neural network models like RNNs and LSTMs. These powerful tools will enable you to perform sophisticated text analysis and generate more accurate predictions and insights.
Section 6: Practical Applications
The course culminates in practical applications of NLP. You’ll build real-world projects such as text summarization tools, sentiment analysis systems, and recommendation engines. By the end of this section, you’ll have hands-on experience creating functional NLP applications that can be deployed in various domains.
Section 7: Final Project and Capstone
In the final section, you’ll apply everything you’ve learned in a capstone project. This project will challenge you to develop a comprehensive NLP solution, showcasing your skills and providing a valuable addition to