PDF Processing Pro

# PDF Processing Pro Production-ready PDF processing toolkit with pre-built scripts, comprehensive error handling, and support for complex workflows. ## Quick start ### Extract text from PDF ```python import pdfplumber with pdfplumber.open("document.pdf") as pdf: text = pdf.pages[0].extract_text() print(text) ``` ### Analyze PDF form (using included script) ```bash python scripts/analyze_form.py input.pdf --output fields.json # Returns: JSON with all form fields, types, and positions ``` ### Fill PDF form with validation ```bash python scripts/fill_form.py input.pdf data.json output.pdf # Validates all fields before filling, includes error reporting ``` ### Extract tables from PDF ```bash python scripts/extract_tables.py report.pdf --output tables.csv # Extracts all tables with automatic column detection ``` ## Features ### ✅ Production-ready scripts All scripts include: - **Error handling**: Graceful failures with detailed error messages - **Validation**: Input validation and type checking - **Logging**: Configurable logging with timestamps - **Type hints**: Full type annotations for IDE support - **CLI interface**: `--help` flag for all scripts - **Exit codes**: Proper exit codes for automation ### ✅ Comprehensive workflows - **PDF Forms**: Complete form processing pipeline - **Table Extraction**: Advanced table detection and extraction - **OCR Processing**: Scanned PDF text extraction - **Batch Operations**: Process multiple PDFs efficiently - **Validation**: Pre and post-processing validation ## Advanced topics ### PDF Form Processing For complete form workflows including: - Field analysis and detection - Dynamic form filling - Validation rules - Multi-page forms - Checkbox and radio button handling See [FORMS.md](FORMS.md) ### Table Extraction For complex table extraction: - Multi-page tables - Merged cells - Nested tables - Custom table detection - Export to CSV/Excel See [TABLES.md](TABLES.md) ### OCR Processing For scanned PDFs and image-based documents: - Tesseract integration - Language support - Image preprocessing - Confidence scoring - Batch OCR See [OCR.md](OCR.md) ## Included scripts ### Form processing **analyze_form.py** - Extract form field information ```bash python scripts/analyze_form.py input.pdf [--output fields.json] [--verbose] ``` **fill_form.py** - Fill PDF forms with data ```bash python scripts/fill_form.py input.pdf data.json output.pdf [--validate] ``` **validate_form.py** - Validate form data before filling ```bash python scripts/validate_form.py data.json schema.json ``` ### Table extraction **extract_tables.py** - Extract tables to CSV/Excel ```bash python scripts/extract_tables.py input.pdf [--output tables.csv] [--format csv|excel] ``` ### Text extraction **extract_text.py** - Extract text with formatting preservation ```bash python scripts/extract_text.py input.pdf [--output text.txt] [--preserve-formatting] ``` ### Utilities **merge_pdfs.py** - Merge multiple PDFs ```bash python scripts/merge_pdfs.py file1.pdf file2.pdf file3.pdf --output merged.pdf ``` **split_pdf.py** - Split PDF into individual pages ```bash python scripts/split_pdf.py input.pdf --output-dir pages/ ``` **validate_pdf.py** - Validate PDF integrity ```bash python scripts/validate_pdf.py input.pdf ``` ## Common workflows ### Workflow 1: Process form submissions ```bash # 1. Analyze form structure python scripts/analyze_form.py template.pdf --output schema.json # 2. Validate submission data python scripts/validate_form.py submission.json schema.json # 3. Fill form python scripts/fill_form.py template.pdf submission.json completed.pdf # 4. Validate output python scripts/validate_pdf.py completed.pdf ``` ### Workflow 2: Extract data from reports ```bash # 1. Extract tables python scripts/extract_tables.py monthly_report.pdf --output data.csv # 2. Extract text for analysis python scripts/extract_text.py monthly_report.pdf --output report.txt ``` ### Workflow 3: Batch processing ```python import glob from pathlib import Path import subprocess # Process all PDFs in directory for pdf_file in glob.glob("invoices/*.pdf"): output_file = Path("processed") / Path(pdf_file).name result = subprocess.run([ "python", "scripts/extract_text.py", pdf_file, "--output", str(output_file) ], capture_output=True) if result.returncode == 0: print(f"✓ Processed: {pdf_file}") else: print(f"✗ Failed: {pdf_file} - {result.stderr}") ``` ## Error handling All scripts follow consistent error patterns: ```python # Exit codes # 0 - Success # 1 - File not found # 2 - Invalid input # 3 - Processing error # 4 - Validation error # Example usage in automation result = subprocess.run(["python", "scripts/fill_form.py", ...]) if result.returncode == 0: print("Success") elif result.returncode == 4: print("Validation failed - check input data") else: print(f"Error occurred: {result.returncode}") ``` ## Dependencies All scripts require: ```bash pip install pdfplumber pypdf pillow pytesseract pandas ``` Optional for OCR: ```bash # Install tesseract-ocr system package # macOS: brew install tesseract # Ubuntu: apt-get install tesseract-ocr # Windows: Download from GitHub releases ``` ## Performance tips - **Use batch processing** for multiple PDFs - **Enable multiprocessing** with `--parallel` flag (where supported) - **Cache extracted data** to avoid re-processing - **Validate inputs early** to fail fast - **Use streaming** for large PDFs (>50MB) ## Best practices 1. **Always validate inputs** before processing 2. **Use try-except** in custom scripts 3. **Log all operations** for debugging 4. **Test with sample PDFs** before production 5. **Set timeouts** for long-running operations 6. **Check exit codes** in automation 7. **Backup originals** before modification ## Troubleshooting ### Common issues **"Module not found" errors**: ```bash pip install -r requirements.txt ``` **Tesseract not found**: ```bash # Install tesseract system package (see Dependencies) ``` **Memory errors with large PDFs**: ```python # Process page by page instead of loading entire PDF with pdfplumber.open("large.pdf") as pdf: for page in pdf.pages: text = page.extract_text() # Process page immediately ``` **Permission errors**: ```bash chmod +x scripts/*.py ``` ## Getting help All scripts support `--help`: ```bash python scripts/analyze_form.py --help python scripts/extract_tables.py --help ``` For detailed documentation on specific topics, see: - [FORMS.md](FORMS.md) - Complete form processing guide - [TABLES.md](TABLES.md) - Advanced table extraction - [OCR.md](OCR.md) - Scanned PDF processing