This chapter will introduce some basic NLP concepts, such as word tokenization and regular expressions to help parse text. You'll also learn how to handle non-English text and more difficult tokenization you might find.

Introduction to regular expressions

Which pattern?

Practicing regular expressions: re.split() and re.findall()

Introduction to tokenization

Word tokenization with NLTK

More regex with re.search()

Advanced tokenization with NLTK and regex

Choosing a tokenizer

Regex with NLTK tokenization

Non-ascii tokenization

Charting word length with NLTK

Charting practice

Regular expressions & word tokenization

This chapter will introduce you to topic identification, which you can apply to any text you encounter in the wild. Using basic NLP models, you will identify topics from texts based on term frequencies. You'll experiment and compare two simple methods: bag-of-words and Tf-idf using NLTK, and a new library Gensim.

Word counts with bag-of-words

Bag-of-words picker

Building a Counter with bag-of-words

Simple text preprocessing

Text preprocessing steps

Text preprocessing practice

Introduction to gensim

What are word vectors?

Creating and querying a corpus with gensim

Gensim bag-of-words

Tf-idf with gensim

What is tf-idf?

Tf-idf with Wikipedia

Simple topic identification

This chapter will introduce a slightly more advanced topic: named-entity recognition. You'll learn how to identify the who, what, and where of your texts using pre-trained models on English and non-English text. You'll also learn how to use some new libraries, polyglot and spaCy, to add to your NLP toolbox.

Named Entity Recognition

NER with NLTK

Stanford library with NLTK

Introduction to SpaCy

Comparing NLTK with spaCy NER

spaCy NER Categories

Multilingual NER with polyglot

French NER with polyglot I

French NER with polyglot II

Spanish NER with polyglot

Named-entity recognition

You'll apply the basics of what you've learned along with some supervised machine learning to build a "fake news" detector. You'll begin by learning the basics of supervised machine learning, and then move forward by choosing a few important features and testing ideas to identify and classify fake news articles.

NLP ile supervised learning kullanarak sahte haberleri sınıflandırma

Hangi olası özellikler?

Eğitim ve test

scikit-learn ile kelime sayım vektörleri oluşturma

Metin sınıflandırma için CountVectorizer

Metin sınıflandırma için TfidfVectorizer

Vektörleri inceleme

scikit-learn ile bir sınıflandırma modelini eğitme ve test etme

Metin sınıflandırma modelleri

CountVectorizer ile "sahte haber" modelini eğitme ve test etme

TfidfVectorizer ile "fake news" modelini eğitme ve test etme

Basit NLP, karmaşık problemler

Modeli geliştirme

Modelini geliştirme

Modelini inceleme

Building a "fake news" classifier

English stopwords

Monty Python and the Holy Grail

News articles

Wikipedia articles

Bu kursta, kelimeleri belirleme ve ayırma, bir metindeki konuları çıkarma ve kendi sahte haber sınıflandırıcını oluşturma gibi doğal dil işleme (NLP) temellerini öğreneceksin. Ayrıca NLTK gibi temel kütüphanelerin yanı sıra, yaygın NLP problemlerini çözmek için derin öğrenmeden yararlanan kütüphaneleri de kullanmayı öğreneceksin. Bu kurs, Python öğrenimine devam ederken metinleri işlemek ve ayrıştırmak için sağlam bir temel sağlayacak.

Python Toolbox

Python ile temel doğal dil işleme tekniklerini öğrenin ve gerçek metinlerden içgörü çıkarın.

Python ile Doğal Dil İşlemeye Giriş

Eğitim ve test

Python ile Doğal Dil İşlemeye Giriş

Uygulamalı interaktif egzersiz