PyObjC CoreServices Framework

Warnings

• breaking PyObjC frequently drops support for older Python versions. PyObjC 12.0 dropped support for Python 3.9, and PyObjC 11.0 dropped Python 3.8.
  Fix: Ensure your Python environment is compatible with the PyObjC version you are installing. For PyObjC 12.x, Python >=3.10 is required. Always check `requires_python` on PyPI or the PyObjC changelog for specific version requirements.
• breaking PyObjC 11.1 changed how initializer methods (methods in the `init` family) are modeled, now correctly reflecting that they 'steal' a reference to `self` and return a new one, as per clang's ARC documentation.
  Fix: Review code that interacts with object initialization, especially custom subclasses or factory methods, to ensure correct reference handling. Explicit memory management is rarely needed in Python, but understanding the underlying Objective-C semantics is crucial for correct behavior.
• gotcha Subclassing certain Cocoa string classes (e.g., `NSString` or `NSMutableString`) in Python can lead to crashes due to special handling within PyObjC.
  Fix: Avoid subclassing `NSString` or `NSMutableString` directly in Python. If custom string-like behavior is needed, consider wrapping `NSString` instances or subclassing Python's `str` and converting when interacting with Objective-C APIs.
• deprecated The `AVFAudio` package was moved from being merged into `AVFoundation` to being a separate top-level package in PyObjC 12.0.
  Fix: Update imports for `AVFAudio` functionality to `import AVFAudio` instead of accessing it through `AVFoundation`.
• deprecated Several functions within the CoreServices framework, such as `LSInit` and `LSTerm`, are no longer available as they were removed in the macOS 10.7 SDK. The `IMServicePlugIn` framework bindings were also removed in PyObjC 10.0 due to deprecation and removal in macOS 14.
  Fix: Avoid using deprecated CoreServices functions and frameworks. Refer to Apple's latest documentation for modern replacements and best practices.

Install

• pip install pyobjc-framework-coreservices Install latest version

Imports

• CoreServices

  import CoreServices

  CoreServices is an umbrella framework; its sub-frameworks' symbols (e.g., LaunchServices, DictionaryServices) are typically accessed directly through the imported 'CoreServices' module.
• Foundation

  from Foundation import NSURL

  Foundation is commonly used with PyObjC frameworks for basic object types like URLs, strings, and collections.

Quickstart

This quickstart demonstrates successfully importing the CoreServices module and accessing a symbolic constant from its LaunchServices sub-framework. It also includes a basic Foundation.NSURL object creation, a common pattern when working with macOS frameworks.

import CoreServices
import Foundation

print(f"PyObjC CoreServices version: {CoreServices.__version__}")

# CoreServices is an umbrella framework. Its functionality is accessed via
# symbols from its sub-frameworks, such as LaunchServices.

try:
    # Access a constant from LaunchServices, exposed via CoreServices
    recent_items_list = CoreServices.kLSSharedFileListRecentDocumentItems
    print(f"Successfully accessed kLSSharedFileListRecentDocumentItems: {recent_items_list}")
except AttributeError:
    print("CoreServices module loaded, but kLSSharedFileListRecentDocumentItems not found or accessible. "
          "This might indicate a version or SDK mismatch.")
except Exception as e:
    print(f"An unexpected error occurred: {e}")

# Example of creating a basic Foundation object, often used with CoreServices operations
file_url = Foundation.NSURL.fileURLWithPath_isDirectory_("/Applications/Safari.app", True)
print(f"Created Foundation.NSURL object: {file_url}")
print("Quickstart complete.")