{"library":"pyobjc-core","title":"PyObjC Core","description":"PyObjC Core is the essential bridge between Python and Objective-C, enabling Python applications to interact with macOS Cocoa frameworks. Version 12.1 is current, and releases typically align with new macOS SDKs and Python versions, with major versions appearing roughly annually and patches more frequently.","language":"python","status":"active","last_verified":"Wed May 20","install":{"commands":["pip install pyobjc-core","pip install pyobjc"],"cli":null},"imports":["import objc","from objc import lookUpClass","from objc import python_class"],"auth":{"required":false,"env_vars":[]},"quickstart":{"code":"import objc\nfrom Foundation import NSString, NSDate, NSObject\n\n# 1. Basic interoperability: Python string to Objective-C NSString\npython_string = \"Hello from PyObjC!\"\nobjc_string = NSString.stringWithString_(python_string)\nprint(f\"Python string: '{python_string}' (Type: {type(python_string)})\\n\")\nprint(f\"Objective-C NSString: '{objc_string}' (Type: {type(objc_string)})\\n\")\n\n# 2. Get current date as NSDate\ncurrent_nsdate = NSDate.date()\nprint(f\"Current NSDate: {current_nsdate} (Type: {type(current_nsdate)})\\n\")\n\n# 3. Define a Python class that inherits from an Objective-C class\n@objc.python_class\nclass MyPythonObject(NSObject):\n    def init(self):\n        self = objc.super(MyPythonObject, self).init()\n        if self is None: return None\n        self.message = \"I am a Python-backed Objective-C object!\"\n        return self\n\n    # Expose a method callable from Objective-C (and Python)\n    @objc.selector('myCustomMethod')\n    def myCustomMethod(self):\n        return self.message\n\n# Create an instance and call the method\n# Note: alloc().init() is the standard Objective-C way to create objects.\npython_objc_instance = MyPythonObject.alloc().init()\nprint(f\"Message from Python-backed ObjC instance: {python_objc_instance.myCustomMethod()}\\n\")","lang":"python","description":"This quickstart demonstrates fundamental PyObjC interoperability, including converting Python types to Objective-C types, interacting with core Cocoa framework classes (like NSString and NSDate from Foundation), and defining Objective-C classes in Python. 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