Updated September 2026, 2 weeks ago
PyData
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Bias Meets Bayes: A Bayesian Perspective on Improving Model Fairness
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![Making bad CLIs fun with Small Language Models [PyCon DE & PyData 2026]](https://i.ytimg.com/vi/tNAOyH1DS6o/mqdefault.jpg "Making bad CLIs fun with Small Language Models [PyCon DE & PyData 2026]
đ Recorded at PyCon DE & PyData 2026, 16.04.2026
https://2026.pycon.de/talks/GMNE3E/
đ Watch Senior Data Scientist Moritz Bauer demonstrate how to transform frustrating command-line interfaces into intuitive, natural-language experiences using fine-tuned Small Language Models.
Speakers:
Moritz Bauer
Description:
Complex command-line interfaces (CLIs) often suffer from steep learning curves due to intricate syntax and obscure flags. While large language models (LLMs) can translate natural language into CLI commands, they typically require cloud connectivity, API keys, and significant computational resources. To address this, a local implementation using small language models (SLMs) with fewer than one billion parameters enables fast, on-device inference without internet dependency.
The approach centers on supervised fine-tuning (SFT) using synthetic datasets. Initial data pairs of natural language instructions and corresponding CLI arguments are generated by prompting a coding LLM (such as Claude Opus) with the tools source code. To prevent the SLM from overfitting to rigid patterns, these pairs undergo prompt mutation, where a teacher model (such as Qwen 3.5 9B or GLM 4.5) generates multiple natural language variations for each command. To maintain data integrity, a filtering step removes variants that omit critical identifiers, such as customer names or dates, which would otherwise force the SLM to hallucinate.
The implementation utilizes the Gemma 2B or smaller variants (specifically a quarter-billion parameter model) fine-tuned via the Hugging Face stack on a MacBook M3 Pro. Training 100,000 pairs takes approximately 10 hours. Testing on an internal plotting tool and FFmpeg yielded an accuracy rate of roughly 85%, with errors typically manifesting as missing or extra flags. Using the Lama CPP inference engine, the system generates commands in under 2.5 seconds, demonstrating that SLMs can effectively map domain-specific natural language to complex technical syntax locally.
âď¸ About PyCon DE:
PyCon DE is the leading conference on open-source Python applications in AI and data science. It brings together industry professionals, researchers, AI and data science practitioners, and software engineering communities, providing a unique platform for collaboration, knowledge sharing, and innovation.
The PyCon DE & PyData 2026 conference delivered an exceptional experience, fostering stronger connections within the Python community while showcasing the latest advancements in artificial intelligence and data science. Attendees enjoyed a diverse and engaging program of talks, workshops, and networking opportunities, further establishing the conference as a premier event for Python, AI, and data science enthusiasts across Germany.
PyCon DE 2027 will take place in Heidelberg from 19 to 23 April 2027.
Follow us:
⢠Newsletter: https://2027.pycon.de/newsletter/
⢠LinkedIn: https://www.linkedin.com/company/pyconde
⢠X: https://www.x.com/pyconde
Links:
⢠Conference website: http://pycon.de
⢠Other sessions: https://2026.pycon.de/talks/
The conference was organized by
⢠Python Softwareverband e.V.: http://pysv.org
⢠Pioneers Hub gemeinnßtzige GmbH: http://pioneershub.org
in collaboration with NumFOCUS Inc.: http://numfocus.org
If you enjoyed this session, please like, and subscribe to our channel for more insightful talks and discussions.
Share this video with your network to spread the knowledge!
Hashtags:
#Python #PyConDE #PyData #OpenSource #AI #DataScience #MachineLearning #SoftwareEngineering #LLMs #Community #Sovereignty
Acknowledgements:
Special thanks to all the volunteers and sponsors who made this event possible.
About:
Python Softwareverband e.V.:
PySV is a non-profit that promotes the use and development of Python in Germany through events, education, and advocacy, fostering an open Python community.
Pioneers Hub gemeinnĂźtzige GmbH:
is a non-profit fostering innovation in AI and tech by connecting experts and promoting knowledge exchange through events and collaborative initiatives.
NumFOCUS Inc.
supports open-source scientific computing by providing financial and logistical support to key projects like NumPy and Jupyter, promoting sustainable development and collaboration.
www.pydata.org
PyData is an educational program of NumFOCUS, a 501(c)3 non-profit organization in the United States. PyData provides a forum for the international community of users and developers of data analysis tools to share ideas and learn from each other. The global PyData network promotes discussion of best practices, new approaches, and emerging technologies for data management, processing, analytics, and visualization. PyData communities approach data science using many languages, including (but not limited to) Python, Julia, and R.")
![Using Sensor Fusion and ML to Navigate Underground When GPS Fails [PyCon DE & PyData 2026]](https://i.ytimg.com/vi/uyrlnwzsW1U/mqdefault.jpg "Using Sensor Fusion and ML to Navigate Underground When GPS Fails [PyCon DE & PyData 2026]
đ Recorded at PyCon DE & PyData 2026, 16.04.2026
https://2026.pycon.de/talks/LVJXK3/
đ Watch Ătienne Tremblay explain how to leverage sensor fusion and ML to maintain precise navigation in GPS-denied underground environments.
Speakers:
Ătienne Tremblay
Description:
Underground navigation is challenging because GPS signals cannot penetrate subway tunnels, leaving smartphones to rely on imprecise cell tower mapping or Wi-Fi scanning with accuracy radii often exceeding one kilometer. To solve this, a system was developed that estimates location by fusing motion sensor data, train schedules, and sparse device locations. The core logic treats the problem as a sequence of events: by detecting when a train moves and stops, the system can count stations traveled from a known starting point.
The technical approach utilizes a two-stage machine learning pipeline. First, a Convolutional Neural Network (CNN) is trained on millions of unlabeled user trips using a pretext task to classify general motion modes (stationary, walking, or automotive) based on accelerometer and gyrometer data. Second, transfer learning is applied to a smaller, high-quality dataset of 300 manually annotated trips to refine a binary classifier that specifically identifies moving metro states. This model is converted to TensorFlow Lite and deployed on-device via Core ML for iOS and Android to ensure functionality during network outages.
A mixer module integrates the binary motion predictions with offline train schedules and any available high-accuracy device locations to resolve edge cases, such as trains stopping between platforms. The system achieves approximately 90% accuracy, with predictions typically within one station of the true location. To manage uncertainty, the user interface employs warning banners and asymmetric confidence intervals, acknowledging a bias toward late rather than early predictions. The entire training pipeline is managed using Vertex AI to handle complex dependency graphs and parallel testing.
âď¸ About PyCon DE:
PyCon DE is the leading conference on open-source Python applications in AI and data science. It brings together industry professionals, researchers, AI and data science practitioners, and software engineering communities, providing a unique platform for collaboration, knowledge sharing, and innovation.
The PyCon DE & PyData 2026 conference delivered an exceptional experience, fostering stronger connections within the Python community while showcasing the latest advancements in artificial intelligence and data science. Attendees enjoyed a diverse and engaging program of talks, workshops, and networking opportunities, further establishing the conference as a premier event for Python, AI, and data science enthusiasts across Germany.
PyCon DE 2027 will take place in Heidelberg from 19 to 23 April 2027.
Follow us:
⢠Newsletter: https://2027.pycon.de/newsletter/
⢠LinkedIn: https://www.linkedin.com/company/pyconde
⢠X: https://www.x.com/pyconde
Links:
⢠Conference website: http://pycon.de
⢠Other sessions: https://2026.pycon.de/talks/
The conference was organized by
⢠Python Softwareverband e.V.: http://pysv.org
⢠Pioneers Hub gemeinnßtzige GmbH: http://pioneershub.org
in collaboration with NumFOCUS Inc.: http://numfocus.org
If you enjoyed this session, please like, and subscribe to our channel for more insightful talks and discussions.
Share this video with your network to spread the knowledge!
Hashtags:
#Python #PyConDE #PyData #OpenSource #AI #DataScience #MachineLearning #SoftwareEngineering #LLMs #Community #Sovereignty
Acknowledgements:
Special thanks to all the volunteers and sponsors who made this event possible.
About:
Python Softwareverband e.V.:
PySV is a non-profit that promotes the use and development of Python in Germany through events, education, and advocacy, fostering an open Python community.
Pioneers Hub gemeinnĂźtzige GmbH:
is a non-profit fostering innovation in AI and tech by connecting experts and promoting knowledge exchange through events and collaborative initiatives.
NumFOCUS Inc.
supports open-source scientific computing by providing financial and logistical support to key projects like NumPy and Jupyter, promoting sustainable development and collaboration.
www.pydata.org
PyData is an educational program of NumFOCUS, a 501(c)3 non-profit organization in the United States. PyData provides a forum for the international community of users and developers of data analysis tools to share ideas and learn from each other. The global PyData network promotes discussion of best practices, new approaches, and emerging technologies for data management, processing, analytics, and visualization. PyData communities approach data science using many languages, including (but not limited to) Python, Julia, and R.")
![Tracking Knowledge Diversity in LLM-Generated Responses. [PyCon DE & PyData 2026]](https://i.ytimg.com/vi/vGvXgpWFS_A/mqdefault.jpg "Tracking Knowledge Diversity in LLM-Generated Responses. [PyCon DE & PyData 2026]
đ Recorded at PyCon DE & PyData 2026, 16.04.2026
https://2026.pycon.de/talks/P7NYXB/
đ Watch Sarah Masud explore the risk of knowledge collapse and discover an open-source framework for tracking and preserving epistemic diversity in LLM-generated responses.
Speakers:
Sarah Masud
Description:
Measuring knowledge diversity in Large Language Model (LLM) responses addresses the problem of information redundancy, where models generate synonymous content across multiple prompts without providing new unique information. To quantify this, text is converted into sentences and grouped into clusters based on semantic similarity and mutual entailment using a BERT-based setup. To penalize random, non-coherent information, the approach employs data mining entropy and the Hill-Shannon diversity metric, which converts log-scale entropy into a linear scale for easier comparison.
Testing across 200 general knowledge topics and 27 models reveals that while model performance improves over time, a significant gap remains compared to the diversity of top 20 Google search results. Model size does not strongly correlate with knowledge diversity. Retrieval-Augmented Generation (RAG) improves diversity, particularly for smaller models, though the effectiveness of RAG varies based on the localization and grounding of the external knowledge source.
âď¸ About PyCon DE:
PyCon DE is the leading conference on open-source Python applications in AI and data science. It brings together industry professionals, researchers, AI and data science practitioners, and software engineering communities, providing a unique platform for collaboration, knowledge sharing, and innovation.
The PyCon DE & PyData 2026 conference delivered an exceptional experience, fostering stronger connections within the Python community while showcasing the latest advancements in artificial intelligence and data science. Attendees enjoyed a diverse and engaging program of talks, workshops, and networking opportunities, further establishing the conference as a premier event for Python, AI, and data science enthusiasts across Germany.
PyCon DE 2027 will take place in Heidelberg from 19 to 23 April 2027.
Follow us:
⢠Newsletter: https://2027.pycon.de/newsletter/
⢠LinkedIn: https://www.linkedin.com/company/pyconde
⢠X: https://www.x.com/pyconde
Links:
⢠Conference website: http://pycon.de
⢠Other sessions: https://2026.pycon.de/talks/
The conference was organized by
⢠Python Softwareverband e.V.: http://pysv.org
⢠Pioneers Hub gemeinnßtzige GmbH: http://pioneershub.org
in collaboration with NumFOCUS Inc.: http://numfocus.org
If you enjoyed this session, please like, and subscribe to our channel for more insightful talks and discussions.
Share this video with your network to spread the knowledge!
Hashtags:
#Python #PyConDE #PyData #OpenSource #AI #DataScience #MachineLearning #SoftwareEngineering #LLMs #Community #Sovereignty
Acknowledgements:
Special thanks to all the volunteers and sponsors who made this event possible.
About:
Python Softwareverband e.V.:
PySV is a non-profit that promotes the use and development of Python in Germany through events, education, and advocacy, fostering an open Python community.
Pioneers Hub gemeinnĂźtzige GmbH:
is a non-profit fostering innovation in AI and tech by connecting experts and promoting knowledge exchange through events and collaborative initiatives.
NumFOCUS Inc.
supports open-source scientific computing by providing financial and logistical support to key projects like NumPy and Jupyter, promoting sustainable development and collaboration.
www.pydata.org
PyData is an educational program of NumFOCUS, a 501(c)3 non-profit organization in the United States. PyData provides a forum for the international community of users and developers of data analysis tools to share ideas and learn from each other. The global PyData network promotes discussion of best practices, new approaches, and emerging technologies for data management, processing, analytics, and visualization. PyData communities approach data science using many languages, including (but not limited to) Python, Julia, and R.")
