Add PyInstaller support for standalone Windows executable
- Add build_exe.py script for easy executable generation - Add PYINSTALLER_GUIDE.md with comprehensive instructions - Updated label_printer.spec for PyInstaller configuration - Tested build process - executable builds successfully - Created dist/LabelPrinter with all dependencies bundled - File size: ~200MB (includes Python runtime and all libraries) - No Python installation required to run the exe
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Quality App Developer
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PYINSTALLER_GUIDE.md
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PYINSTALLER_GUIDE.md
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# Building a Standalone EXE with PyInstaller
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This guide explains how to create a standalone Windows executable (`.exe`) file that doesn't require Python to be installed.
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## Quick Start (Windows)
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### Prerequisites
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- Python 3.11+ installed
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- Virtual environment activated
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- All dependencies installed
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### One-Command Build
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```bash
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# Activate virtual environment
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venv\Scripts\activate
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# Build the executable
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python build_exe.py
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```
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That's it! Your executable will be in `dist/LabelPrinter.exe`
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---
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## What Happens During Build
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1. **Analyzes your code** - Finds all imported modules
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2. **Collects dependencies** - Bundles Kivy, PIL, barcode, reportlab, etc.
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3. **Creates executable** - Packages everything into one `.exe` file
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4. **Output**: `dist/LabelPrinter.exe` (~150-200 MB)
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---
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## Detailed Build Instructions
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### Step 1: Install PyInstaller
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```bash
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venv\Scripts\activate
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pip install pyinstaller
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```
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### Step 2: Build Using Script
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```bash
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python build_exe.py
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```
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### Step 3: Alternative Manual Build
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If the script doesn't work, use this command directly:
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```bash
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pyinstaller ^
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--onefile ^
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--windowed ^
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--name=LabelPrinter ^
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--hidden-import=kivy ^
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--hidden-import=kivy.core.window ^
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--hidden-import=kivy.core.text ^
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--hidden-import=kivy.core.image ^
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--hidden-import=kivy.uix.boxlayout ^
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--hidden-import=kivy.uix.gridlayout ^
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--hidden-import=kivy.uix.label ^
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--hidden-import=kivy.uix.textinput ^
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--hidden-import=kivy.uix.button ^
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--hidden-import=kivy.uix.spinner ^
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--hidden-import=kivy.uix.scrollview ^
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--hidden-import=kivy.uix.popup ^
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--hidden-import=kivy.clock ^
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--hidden-import=kivy.graphics ^
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--hidden-import=PIL ^
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--hidden-import=barcode ^
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--hidden-import=reportlab ^
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--hidden-import=print_label ^
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--hidden-import=print_label_pdf ^
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--collect-all=kivy ^
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--collect-all=PIL ^
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label_printer_gui.py
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```
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---
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## Output Files
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After building, you'll have:
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```
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Label-design/
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├── dist/
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│ └── LabelPrinter.exe ← Your standalone executable (150-200 MB)
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├── build/ ← Temporary build files (can delete)
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└── label_printer.spec ← PyInstaller spec file
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```
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---
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## Running the Executable
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### On Your Computer
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1. Double-click `dist/LabelPrinter.exe`
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2. App starts immediately (first run takes ~5 seconds)
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3. Works like the Python version
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### Sharing with Others
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1. Copy `dist/LabelPrinter.exe` to a folder
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2. Create a shortcut to it on the desktop
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3. Share the folder or executable
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4. **No Python installation needed on their computer!**
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### Creating a Shortcut
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1. Right-click `LabelPrinter.exe`
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2. Send to → Desktop (create shortcut)
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3. Double-click the shortcut to run
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---
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## Troubleshooting
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### "Failed to build the executable"
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**Solution 1**: Check Python version
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```bash
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python --version # Should be 3.11+
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```
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**Solution 2**: Update PyInstaller
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```bash
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pip install --upgrade pyinstaller
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```
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**Solution 3**: Install missing dependencies
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```bash
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pip install -r requirements_windows.txt
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pip install pyinstaller
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```
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### "DLL load failed" when running exe
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This usually means a library isn't bundled correctly.
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**Solution**: Rebuild with verbose output
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```bash
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pyinstaller --debug=imports label_printer_gui.py
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```
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### Executable is very large (200+ MB)
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This is normal for Kivy applications. The size includes:
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- Python runtime (~50 MB)
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- Kivy framework (~30 MB)
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- Dependencies (PIL, barcode, reportlab, etc.) (~20 MB)
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- Your code (~1 KB)
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You can reduce size slightly with:
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```bash
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--exclude-module=matplotlib
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--exclude-module=numpy
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--exclude-module=scipy
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```
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### Slow to start (5-10 seconds)
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Normal for Kivy apps. The first startup initializes:
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- Python runtime
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- Kivy graphics system
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- Font rendering
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- Window initialization
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Subsequent runs are faster (~3 seconds).
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---
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## Advanced Options
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### Add an Icon
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1. Create a 256x256 PNG icon: `app_icon.png`
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2. Convert to ICO: Use an online tool or ImageMagick
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3. Build with icon:
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```bash
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pyinstaller --icon=app_icon.ico label_printer_gui.py
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```
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### Two-File Distribution
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Instead of `--onefile`, use separate files for faster startup:
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```bash
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pyinstaller label_printer_gui.py
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```
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Creates `dist/` folder with all files (faster to run, easier to debug).
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### Console Output
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To see error messages, remove `--windowed`:
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```bash
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pyinstaller --onefile --name=LabelPrinter label_printer_gui.py
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```
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---
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## Build Options Reference
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| Option | Purpose |
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|--------|---------|
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| `--onefile` | Single executable (recommended) |
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| `--windowed` | No console window |
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| `--icon=file.ico` | Custom icon |
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| `--hidden-import=module` | Include module that's not imported directly |
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| `--collect-all=module` | Include all module data |
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| `--distpath=folder` | Output directory |
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| `--name=AppName` | Executable name |
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---
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## Final Steps
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1. **Test the executable**: Run `LabelPrinter.exe` and test all features
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2. **Verify PDF backup**: Check `pdf_backup/` folder is created
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3. **Test printing**: Print a label to ensure PDF output works
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4. **Share**: Distribute the `.exe` file to users
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---
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## Questions?
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- Check the error message in the console
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- Try rebuilding with `python build_exe.py`
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- Ensure all dependencies are installed: `pip install -r requirements_windows.txt`
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- Check that Python 3.11+ is installed: `python --version`
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Good luck! 🚀
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