Explore sentiment analysis techniques in Python through this EuroPython conference talk. Delve into the evolving landscape of natural language processing, from simple libraries to complex machine learning systems. Learn about basic semantic mapping, emoticon analysis, and cutting-edge applications of neural networks and deep learning in NLP. Discover various tools and approaches for sentiment analysis, including TextBlob, Bag of Words, Naive Bayes, word2vec preprocessing, and implementations using Metamind, Optimus, TensorFlow, and Watson. Gain insights into the challenges of emotion detection in text and understand the pitfalls of different methodologies. Follow along with hands-on code demonstrations and participate in a Q&A session to deepen your understanding of sentiment analysis in Python.