ipywidgets upload files and run somekind of process on them

jslinked_upload_and_run_widgets.ipynb

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    "import traitlets\n",
    "from ipywidgets import widgets\n",
    "from IPython.display import display\n",
    "from tkinter import Tk, filedialog\n",
    "\n",
    "def process(files):\n",
    "    # Copy and paste top secret algorithm here.\n",
    "    \n",
    "    print(\"Here are your preocessed files:\")\n",
    "    [print(i) for i in files]\n",
    "\n",
    "class SelectFilesButton(widgets.Button):\n",
    "    \"\"\"A file widget that leverages tkinter.filedialog.\"\"\"\n",
    "    files = traitlets.List([], help=\"List of file paths\").tag(sync=True)\n",
    "\n",
    "    def __init__(self, *args, **kwargs):\n",
    "        \"\"\"Initialize the SelectFilesButton class.\"\"\"\n",
    "        super(SelectFilesButton, self).__init__(*args, **kwargs)\n",
    "        # Create the button.\n",
    "        self.description = \"Select Files\"\n",
    "        self.icon = \"square-o\"\n",
    "        self.style.button_color = \"orange\"\n",
    "        # Set on click behavior.\n",
    "        self.on_click(self.select_files)\n",
    "\n",
    "    @staticmethod\n",
    "    def select_files(b):\n",
    "        \"\"\"Generate instance of tkinter.filedialog.\n",
    "\n",
    "        Parameters\n",
    "        ----------\n",
    "        b : obj:\n",
    "            An instance of ipywidgets.widgets.Button\n",
    "        \"\"\"\n",
    "        # Create Tk root\n",
    "        root = Tk()\n",
    "        # Hide the main window\n",
    "        root.withdraw()\n",
    "        # Raise the root to the top of all windows.\n",
    "        root.call('wm', 'attributes', '.', '-topmost', True)\n",
    "        # List of selected fileswill be set to b.value\n",
    "        b.files = filedialog.askopenfilename(multiple=True)\n",
    "\n",
    "        b.description = \"Files Selected\"\n",
    "        b.icon = \"check-square-o\"\n",
    "        b.style.button_color = \"lightgreen\"\n",
    "\n",
    "\n",
    "class RunButton(widgets.Button):\n",
    "    \"\"\"Button that begins processing the selected files.\"\"\"\n",
    "    files = traitlets.List([], help=\"List of file paths\").tag(sync=True)\n",
    "    \n",
    "    def __init__(self, *args, **kwargs):\n",
    "        \"\"\"Initialize the SelectFilesButton class.\"\"\"\n",
    "        super(RunButton, self).__init__(*args, **kwargs)\n",
    "        self.add_traits(data=traitlets.Instance(object))\n",
    "        self.description = \"Run\"\n",
    "        self.button_style = \"info\"\n",
    "        self.icon = \"play\"\n",
    "        self.process = \"process\"\n",
    "        self.on_click(self.run_process)\n",
    "\n",
    "    @staticmethod\n",
    "    def run_process(b):\n",
    "        \"\"\"Run the process defined in the __init__ def.\"\"\"\n",
    "        process = eval(b.process)\n",
    "        b.data = process(b.files)\n",
    "\n",
    "rb = RunButton()\n",
    "sb = SelectFilesButton()\n",
    "widgets.jslink((sb,'files'), (rb,'files'))\n",
    "display(sb,rb)\n",
    "\n"
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