{
    "info": {
        "author": "Justin Engel",
        "author_email": "jtengel08@gmail.com",
        "bugtrack_url": null,
        "classifiers": [
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 3"
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        "description": "# qt_multiprocessing\n\nLong running process that runs along side of the Qt event loop and allows other widgets to live in the other process.\n\n## Quick Start\n\n```python\nimport os\nimport qt_multiprocessing\n\nfrom qtpy import QtWidgets\n\n\nclass MyPIDLabel(QtWidgets.QLabel):\n    def print_pid(self):\n        text = self.text()\n        print(text, 'PID:', os.getpid())\n        return text\n\n\nclass MyPIDLabelProxy(qt_multiprocessing.WidgetProxy):\n    PROXY_CLASS = MyPIDLabel\n    GETTERS = ['text']\n\n\nif __name__ == '__main__':\n    with qt_multiprocessing.MpApplication() as app:\n        print(\"Main PID:\", os.getpid())\n\n        # Proxy\n        lbl = MyPIDLabelProxy(\"Hello\")\n\n        widg = QtWidgets.QDialog()\n        lay = QtWidgets.QFormLayout()\n        widg.setLayout(lay)\n\n        # Form\n        inp = QtWidgets.QLineEdit()\n        btn = QtWidgets.QPushButton('Set Text')\n        lay.addRow(inp, btn)\n\n        def set_text():\n            text = inp.text()\n            lbl.setText(inp.text())\n\n            # Try to somewhat prove that the label is in a different process.\n            # `print_pid` Not exposed (will call in other process. Result will be None)\n            print('Set Label text', text + '. Label text in this process', lbl.print_pid())\n\n            # `print_pid` will run in a separate process and print the pid.\n\n        btn.clicked.connect(set_text)\n\n        widg.show()\n```\n\nBelow is an example for if you want to manually create widgets in a different process without the proxy.\n\n```python\nimport os\nimport qt_multiprocessing\n\nfrom qtpy import QtWidgets\n\n\nclass MyPIDLabel(QtWidgets.QLabel):\n    def print_pid(self):\n        text = self.text()\n        print(text, 'PID:', os.getpid())\n        return text\n\n\ndef create_process_widgets():\n    lbl = MyPIDLabel('Hello')\n    lbl.show()\n    return {'label': lbl}\n\n\nif __name__ == '__main__':\n    with qt_multiprocessing.MpApplication(initialize_process=create_process_widgets) as app:\n        print(\"Main PID:\", os.getpid())\n\n        widg = QtWidgets.QDialog()\n        lay = QtWidgets.QFormLayout()\n        widg.setLayout(lay)\n\n        # Form\n        inp = QtWidgets.QLineEdit()\n        btn = QtWidgets.QPushButton('Set Text')\n        lay.addRow(inp, btn)\n\n        def set_text():\n            text = inp.text()\n            app.add_var_event('label', 'setText', text)\n\n            # The label does not exist in this process at all. Can only access by string names\n            print('Set Label text', text + '.')\n\n            # `print_pid` will run in a separate process and print the pid.\n            app.add_var_event('label', 'print_pid')\n\n        btn.clicked.connect(set_text)\n\n        widg.show()\n```\n\n## How it works\n\nThis library works by creating an event loop in a separate process while the Qt application is running in the main \nprocess. This library is built off of the mp_event_loop library which creates a long running process where events are\nthrown on a queue and executed in a separate process. The other process that is created also runs it's own Qt \napplication while executing events in a timer.\n\nThis library has the ability to:\n  * dynamic creation of widgets in a separate process\n  * Run methods of widgets in a separate process through variable names\n  * Proxy widgets\n  \n\n## Manual Example\n\nThis example shows how everything comes together manually\n\n```python\nimport os\nimport qt_multiprocessing\n\nfrom qtpy import QtWidgets\n\n\nclass MyPIDLabel(QtWidgets.QLabel):\n    def print_pid(self):\n        text = self.text()\n        print(text, 'PID:', os.getpid())\n        return text\n\n\ndef create_process_widgets():\n    lbl = MyPIDLabel('Hello')\n    lbl.show()\n    return {'label': lbl}\n\n\nif __name__ == '__main__':\n    app = QtWidgets.QApplication([])\n    mp_loop = qt_multiprocessing.AppEventLoop(initialize_process=create_process_widgets)\n    print(\"Main PID:\", os.getpid())\n\n    widg = QtWidgets.QDialog()\n    lay = QtWidgets.QFormLayout()\n    widg.setLayout(lay)\n\n    # Form\n    inp = QtWidgets.QLineEdit()\n    btn = QtWidgets.QPushButton('Set Text')\n    lay.addRow(inp, btn)\n\n    def set_text():\n        text = inp.text()\n        mp_loop.add_var_event('label', 'setText', text)\n\n        # The label does not exist in this process at all. Can only access by string names\n        print('Set Label text', text + '.')\n\n        # `print_pid` will run in a separate process and print the pid.\n        mp_loop.add_var_event('label', 'print_pid')\n\n    btn.clicked.connect(set_text)\n\n    widg.show()\n\n    # Run the multiprocessing event loop\n    mp_loop.start()\n\n    # Run the application event loop\n    app.exec_()\n\n    # Quit the multiprocessing event loop when the app closes\n    mp_loop.close()\n```",
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