importspy 0.1.3

A tool to monitor and trace module imports in Python projects.

🕵️‍♂️ ImportSpy

ImportSpy is a tool that allows you to monitor and dynamically trace imported modules in a Python script, with advanced features like module re-importing and optional validation. The core of the package is the Spy class, which inspects the stack and safely re-imports modules, even handling recursion detection.

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🔍 What is ImportSpy?

ImportSpy is a Python package designed to track and monitor imported modules during script execution. Using the Spy class, you can inspect the stack, identify the module that called the function, and dynamically re-import it, with the option to add a validation function to ensure the module is correctly loaded.

Recursion detection and the use of importlib for dynamic import management make ImportSpy a powerful tool for developers who want more control over the modules being loaded.

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🚨 Key Features

• Dynamic Import with Validation: The Spy class allows dynamic re-importing of modules, with an optional validation function that checks if the imported module meets specific criteria.
• Recursion Detection: ImportSpy automatically detects recursion, raising an error if the module being imported is the same as the calling module.
• Stack Inspection: Uses the inspect module to access the stack and identify the context in which a module is being imported.
• Custom Import Handling: By using importlib, ImportSpy gives you control over how and when a module is imported, providing flexibility for complex projects.

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💼 Use Cases

• Debugging Complex Projects: Track which modules are loaded and when, especially in projects that need dynamic imports or where you want to avoid redundant module loading.
• Dependency Optimization: The ability to validate imported modules and detect recursion helps you optimize how dependencies are managed, reducing potential errors or conflicts.
• Plugin-Based Systems: When developing modular architectures that extend via plugins, ImportSpy helps monitor which modules are imported by plugins and validates their correct integration.
• Import Validation: The optional validation function allows you to apply custom logic to ensure that the imported module meets your project’s requirements.

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📦 Installation

Setting up ImportSpy is simple! You can install it directly from PyPI with:

pip install importspy

Then, start using it by importing and configuring the Spy:

from importspy import Spy

module = Spy().importspy(validation=lambda mod: hasattr(mod, 'required_attribute'))

if module:
    print(f"Module {module.__name__} imported successfully!")
else:
    print("Module import failed validation.")

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🚀 How to Use ImportSpy

The core of ImportSpy is the Spy class, designed to facilitate dynamic import monitoring. Here’s how to use it to re-import a module with optional validation:

1. Create a Spy instance: Start by creating an instance of the Spy class.
2. Use importspy to dynamically re-import a module: Call the importspy method to re-import the calling module. You can also pass an optional validation function.
3. Handle recursion errors: If the method detects recursion within the same module (the caller and current frames originate from the same file), a ValueError is raised to prevent infinite loops.

Example

from importspy import Spy

spy = Spy()

# Dynamically re-import the calling module with validation
module = spy.importspy(validation=lambda mod: mod.__name__ == "target_module")

# If the module is valid, proceed with the code
if module:
    print(f"Module {module.__name__} imported and validated!")
else:
    print("Module import failed or did not pass validation.")

How it works:

• Dynamic Import: The importspy method inspects the call stack to identify which module triggered the import and re-imports it dynamically using importlib.util.
• Optional Validation: You can pass a validation function that checks the module after it's imported. The function must return True for the module to be considered valid.
• Recursion Detection: ImportSpy prevents the re-importing of the same module by detecting recursion and raising an error if the current and caller modules are the same.

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🔧 Handling Dynamic Imports and Recursion

The importspy method uses the inspect library to identify the module that called the function. It then uses importlib.util to dynamically re-import that module. You can also provide an optional validation function to perform checks on the imported module.

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🌟 Why Use ImportSpy?

ImportSpy gives you detailed and configurable control over the modules imported in your Python projects. With the ability to dynamically re-import modules and validate imports, ImportSpy is a valuable tool for improving dependency management and optimizing the import flow.

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🛠️ Contributing

We welcome contributions! If you’d like to help improve ImportSpy, please check out our contributing guide to get started. Whether it’s reporting bugs, proposing new features, or submitting pull requests, we’re happy to collaborate with you!

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📄 License

This project is licensed under the MIT License—see the LICENSE file for details.

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📫 Contact

Have questions or suggestions? Feel free to reach out! We’re always happy to hear how ImportSpy is being used in your Python projects.

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🕵️‍♂️ Spy on Your Imports Today!

Don’t let imports slow your project down. Add ImportSpy to your toolkit and take control of your dependencies. Happy coding! 🎉