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requirements.txt

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+# Tool_OCR - Backend Dependencies
+# Python 3.10+
+
+# ===== Core Framework =====
+fastapi==0.115.0
+uvicorn[standard]==0.32.0
+pydantic==2.9.2
+pydantic-settings==2.6.1
+email-validator>=2.0.0  # For pydantic EmailStr validation
+
+# ===== OCR Engine =====
+paddleocr>=3.0.0
+paddlepaddle>=3.0.0
+
+# ===== Image Processing =====
+pillow>=10.0.0
+pdf2image>=1.17.0
+opencv-python>=4.8.0
+
+# ===== PDF Generation =====
+weasyprint>=60.0
+markdown>=3.5.0
+# Note: pandoc needs to be installed via brew (brew install pandoc)
+
+# ===== Data Export =====
+pandas>=2.1.0
+openpyxl>=3.1.0  # Excel support
+
+# ===== Database =====
+sqlalchemy>=2.0.0
+pymysql>=1.1.0
+alembic>=1.13.0
+
+# ===== Authentication =====
+python-jose[cryptography]>=3.3.0
+passlib[bcrypt]>=1.7.4
+bcrypt==4.2.1  # Pin to 4.2.1 for passlib compatibility
+python-multipart>=0.0.6
+
+# ===== Configuration =====
+python-dotenv>=1.0.0
+pyyaml>=6.0
+
+# ===== HTTP Client =====
+httpx>=0.25.0
+requests>=2.31.0
+
+# ===== Background Tasks (Optional) =====
+# redis>=5.0.0  # Uncomment if using Redis for task queue
+# celery>=5.3.0  # Uncomment if using Celery
+
+# ===== Translation (Reserved) =====
+# argostranslate>=1.9.0  # Uncomment when implementing translation
+
+# ===== Development Tools =====
+pytest>=7.4.0
+pytest-asyncio>=0.21.0
+pytest-cov>=4.1.0
+black>=23.9.0
+pylint>=3.0.0
+
+# ===== Utilities =====
+python-magic>=0.4.27  # File type detection