Free Source Code, Capstone Projects & Programming Tutorials

Your trusted resource for downloadable source code, complete capstone projects with ER diagrams and Chapter 1-5 documentation, AI-ready capstones (RAG, ChatGPT, computer vision), and step-by-step tutorials in PHP, Python, Java, JavaScript, and more. Built by working developers, tested before publishing, and updated for 2026.

📅 Updated weekly | ✅ Code tested before publishing | 👨‍💻 Built by PIES IT Solutions developers

Python KeyError with defaultdict: Why It Still Happens (2026)

Python KeyError with defaultdict Why It Still Happens (2026)

You picked collections.defaultdict specifically to avoid KeyError, then it still raised one. The most common 2026 causes: you used .get() or **unpacking (which bypasses the default factory), you serialized it …

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Python IndexError on String and Tuple Indexing (2026)

Python IndexError on String and Tuple Indexing (2026)

Strings and tuples in Python both raise IndexError on out-of-range indexing, but never on slicing. Knowing the difference between s[5] (raises) and s[5:10] (returns empty string) is the foundation of …

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ModuleNotFoundError: No Module Named ‘crewai’ (2026)

ModuleNotFoundError No Module Named 'crewai' (2026)

CrewAI is a Python framework for orchestrating role-based AI agents that collaborate on tasks. It is one of the hottest multi-agent frameworks in 2026 alongside LangGraph. If you see ModuleNotFoundError: …

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Python dict.pop KeyError: Use .pop(key, default) (2026)

Python dict.pop KeyError Use .pop(key, default) (2026)

You called my_dict.pop(“key”) and Python crashed with KeyError. The fix is simple: my_dict.pop(“key”, None) returns None instead of raising. But there are subtleties around when to use which form, and …

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ModuleNotFoundError: No Module Named ‘instructor’ (2026)

ModuleNotFoundError No Module Named 'instructor' (2026)

Instructor patches LLM clients to return validated Pydantic models instead of raw JSON. If you see ModuleNotFoundError: No module named ‘instructor’, install with one pip command and pair with whichever …

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Python IndexError pop from empty list: 4 Fixes (2026)

Python IndexError pop from empty list 4 Fixes (2026)

IndexError: pop from empty list happens when you call list.pop() on an empty list. This is one of the most common Python bugs in queues, stacks, work-stealing loops, and item-by-item …

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Pandas merge KeyError on Join Column: Fix (2026)

Pandas merge KeyError on Join Column Fix (2026)

You called orders.merge(customers, on=”customer_id”) and got KeyError. Both DataFrames have a “customer_id” column, you can see them, but pandas insists one is missing. This guide walks through the 4 most …

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ModuleNotFoundError: No Module Named ‘anthropic’ (2026)

ModuleNotFoundError No Module Named 'anthropic' (2026)

Anthropic is the official Python SDK for Claude. If your script raises ModuleNotFoundError: No module named ‘anthropic’, install it with one pip command. Make sure your environment also has the …

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Frequently Asked Questions

Are these deep learning projects free for capstone and thesis use?
Yes. All deep learning projects on this hub are free to download, modify, and submit. No attribution required for academic use. Most are MIT-licensed or include source-code packs with sample datasets and pretrained model weights.
What deep learning frameworks do I need installed?
Most projects use OpenCV (cv2) for video capture and image preprocessing, plus one of: TensorFlow / Keras (Caffe model loading via cv2.dnn, custom CNN training), PyTorch (research-style models, YOLO v5+, transformers), or MediaPipe (Google's optimized face/hand/pose detectors). Install with pip install opencv-python tensorflow keras torch torchvision mediapipe numpy. Python 3.10, 3.11, or 3.12 recommended (avoid 3.13 until all wheels catch up).
Do I need a GPU to run these deep learning projects?
For inference (running a pretrained model on your webcam): no, CPU runs at 15-30 FPS for most computer-vision tasks. For training a custom model on your own dataset: GPU strongly recommended (CPU works but is slow). Free GPU options: Google Colab Free (12-hour sessions, sufficient for most BSIT capstones), Kaggle Notebooks Free (30-hour weekly quota), Paperspace Free tier. No need to buy a $1000+ GPU just for a capstone defense.
Deep learning vs classical machine learning, which should I pick for my capstone?
Pick deep learning when your inputs are unstructured (images, audio, video, text) and you have 10,000+ training samples. Pick classical ML (random forest, SVM, logistic regression) for tabular data, small datasets (under 1,000 rows), or when you need explainable predictions for the panel. Many capstones combine both: deep learning for feature extraction (face embedding via FaceNet) plus classical ML on top (SVM classifier for identity matching).
Why is my OpenCV deep learning model running at 2 FPS?
Three usual causes: (1) Resolution too high, resize frames to 640x480 or 320x240 before inference. (2) Wrong cv2.dnn backend, set net.setPreferableBackend(cv2.dnn.DNN_BACKEND_OPENCV) and net.setPreferableTarget(cv2.dnn.DNN_TARGET_CPU). (3) Heavy model on weak hardware, swap YOLO v5 for MobileNet-SSD or use Haar cascades for simple face/eye detection. Also close other applications and disable laptop battery-save throttling.
Can I extend a single OpenCV demo into a full BSIT capstone?
Yes, and you should. A standalone webcam demo (face detection alone) is too narrow for capstone scope. Wrap it in a real system: face recognition becomes Real-Time Attendance System with PHP/MySQL dashboard, object detection becomes Smart CCTV Alert System with email notifications, drowsiness detection becomes Driver Monitoring System for fleet vehicles. Add user accounts, database logging, simple admin UI, and write Chapters 1-5 manuscript to satisfy panel requirements.
How often is this deep learning projects list updated?
New deep learning projects are added periodically as we receive student requests and new models become OpenCV-compatible. Last refreshed June 2026 with 19 vision-focused projects covering face recognition, object detection, traffic-sign classification, OCR, and more.