Adjusted dev environment

.devcontainer/Dockerfile

@@ -0,0 +1,17 @@
+FROM python:3.7
+
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends \
+        git \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+RUN python -m pip install --upgrade colorlog black pylint
+RUN python -m pip install --upgrade git+git://github.com/home-assistant/home-assistant.git@dev
+RUN cd && mkdir -p /config/custom_components
+
+
+WORKDIR /workspace
+
+# Set the default shell to bash instead of sh
+ENV SHELL /bin/bash

.devcontainer/README.md

@@ -0,0 +1,53 @@
+# Devcontainer
+
+_The easiest way to contribute to and/or test this repository._
+
+## Requirements
+
+- [git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git)
+- [docker](https://docs.docker.com/install/)
+- [VS Code](https://code.visualstudio.com/)
+- [Remote - Containers (VSC Extention)](https://marketplace.visualstudio.com/items?itemName=ms-vscode-remote.remote-containers)
+
+[More info about requirements and devcontainer in general](https://code.visualstudio.com/docs/remote/containers#_getting-started)
+
+## How to use Devcontainer for development/test
+
+1. Make sure your computer meets the requirements.
+1. Fork this repository.
+1. Clone the repository to your computer.
+1. Open the repository using VS Code.
+
+When you open this repository with VSCode and your computer meets the requirements you are asked to "Reopen in Container", do that.
+
+![reopen](images/reopen.png)
+
+If you don't see this notification, open the command pallet (ctrl+shift+p) and select `Remote-Containers: Reopen Folder in Container`.
+
+_It will now build the devcontainer._
+
+The container have some "tasks" to help you testing your changes.
+
+## Custom Tasks in this repository
+
+_Start "tasks" by opening the the command pallet (ctrl+shift+p) and select `Tasks: Run Task`_
+
+Running tasks like `Start Home Assistant on port 8124` can be restarted by opening the the command pallet (ctrl+shift+p) and select `Tasks: Restart Running Task`, then select the task you want to restart.
+
+### Start Home Assistant on port 8124
+
+This will copy the configuration and the integration files to the expected location in the container.
+
+And start up Home Assistant on [port 8124.](http://localhost:8124)
+
+### Upgrade Home Assistant to latest dev
+
+This will upgrade Home Assistant to the latest dev version.
+
+### Set Home Assistant Version
+
+This allows you to specify a version of Home Assistant to install inside the devcontainer.
+
+### Home Assistant Config Check
+
+This runs a config check to make sure your config is valid.

.devcontainer/configuration.yaml

@@ -0,0 +1,12 @@
+default_config:
+logger:
+  default: error
+  logs:
+    custom_components.yahoofinance: debug
+
+
+sensor:
+  platform: yahoofinance
+  use_trending_icon: True
+  symbols:
+    - ISTNX

.devcontainer/custom_component_helper

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+function StartHomeAssistant {
+  echo "Copy configuration.yaml"
+  cp -f .devcontainer/configuration.yaml /config || echo ".devcontainer/configuration.yaml are missing!" exit 1
+
+  echo "Copy the custom component"
+  rm -R /config/custom_components/ || echo ""
+  cp -r custom_components /config/custom_components/ || echo "Could not copy the custom_component" exit 1
+
+  echo "Start Home Assistant"
+  hass -c /config
+}
+
+function UpdgradeHomeAssistantDev {
+  python -m pip install --upgrade git+git://github.com/home-assistant/home-assistant.git@dev
+}
+
+function SetHomeAssistantVersion {
+  read -p 'Version: ' version
+  python -m pip install --upgrade homeassistant==$version
+}
+
+function HomeAssistantConfigCheck {
+  hass -c /config --script check_config
+}

.devcontainer/devcontainer.json

@@ -0,0 +1,24 @@
+// See https://aka.ms/vscode-remote/devcontainer.json for format details.
+{
+	"context": "..",
+	"dockerFile": "Dockerfile",
+	"appPort": "8124:8123",
+	"runArgs": [
+		"-e",
+		"GIT_EDTIOR='code --wait'"
+	],
+	"extensions": [
+		"ms-python.python",
+		"spmeesseman.vscode-taskexplorer"
+	],
+	"settings": {
+		"python.pythonPath": "/usr/local/bin/python",
+		"python.linting.pylintEnabled": true,
+		"python.linting.enabled": true,
+		"python.formatting.provider": "black",
+		"editor.formatOnPaste": false,
+		"editor.formatOnSave": true,
+		"editor.formatOnType": true,
+		"files.trimTrailingWhitespace": true
+	}
+}

.vscode/tasks.json

@@ -0,0 +1,61 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "Start Home Assistant on port 8124",
+            "type": "shell",
+            "command": "source .devcontainer/custom_component_helper && StartHomeAssistant",
+            "group": {
+                "kind": "test",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": []
+        },
+        {
+            "label": "Upgrade Home Assistant to latest dev",
+            "type": "shell",
+            "command": "source .devcontainer/custom_component_helper && UpdgradeHomeAssistantDev",
+            "group": {
+                "kind": "test",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": []
+        },
+        {
+            "label": "Set Home Assistant Version",
+            "type": "shell",
+            "command": "source .devcontainer/custom_component_helper && SetHomeAssistantVersion",
+            "group": {
+                "kind": "test",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": []
+        },
+        {
+            "label": "Home Assistant Config Check",
+            "type": "shell",
+            "command": "source .devcontainer/custom_component_helper && HomeAssistantConfigCheck",
+            "group": {
+                "kind": "test",
+                "isDefault": true
+            },
+            "presentation": {
+                "reveal": "always",
+                "panel": "new"
+            },
+            "problemMatcher": []
+        }
+    ]
+}

custom_components/yahoofinance/sensor.py

@@ -10,17 +10,13 @@
 
 import aiohttp
 import async_timeout
-import voluptuous as vol
-
 import homeassistant.helpers.config_validation as cv
+import voluptuous as vol
 from homeassistant.components.sensor import PLATFORM_SCHEMA
 from homeassistant.const import ATTR_ATTRIBUTION, CONF_SCAN_INTERVAL
 from homeassistant.helpers.aiohttp_client import async_get_clientsession
 from homeassistant.helpers.entity import Entity, async_generate_entity_id
-from homeassistant.helpers.update_coordinator import (
-    DataUpdateCoordinator,
-    UpdateFailed,
-)
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
 
 from .const import (
     ATTR_CURRENCY_SYMBOL,
@@ -52,7 +48,9 @@
 )
 
 
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):  # pylint: disable=unused-argument
+async def async_setup_platform(
+    hass, config, async_add_entities, discovery_info=None
+):  # pylint: disable=unused-argument
     """Set up the Yahoo Finance sensors."""
     symbols = config.get(CONF_SYMBOLS, [])
     coordinator = YahooSymbolUpdateCoordinator(
@@ -73,7 +71,9 @@ async def handle_refresh_symbols(_call):
         await coordinator.async_request_refresh()
 
     hass.services.async_register(
-        DOMAIN, SERVICE_REFRESH, handle_refresh_symbols,
+        DOMAIN,
+        SERVICE_REFRESH,
+        handle_refresh_symbols,
     )
 
     _LOGGER.info("Added sensors for %s", symbols)
@@ -96,9 +96,7 @@ def __init__(self, coordinator, symbol, hass) -> None:
         """Initialize the sensor."""
         self._symbol = symbol
         self._coordinator = coordinator
-        self.entity_id = async_generate_entity_id(
-            ENTITY_ID_FORMAT, symbol, hass=hass
-        )
+        self.entity_id = async_generate_entity_id(ENTITY_ID_FORMAT, symbol, hass=hass)
         _LOGGER.debug("Created %s", self.entity_id)
 
     @property
@@ -196,7 +194,10 @@ def __init__(self, symbols, hass, update_interval) -> None:
         self.websession = async_get_clientsession(hass)
 
         super().__init__(
-            hass, _LOGGER, name=DOMAIN, update_interval=update_interval,
+            hass,
+            _LOGGER,
+            name=DOMAIN,
+            update_interval=update_interval,
         )
 
     async def _async_update_data(self):
@@ -212,9 +213,7 @@ async def get_json(self):
         json = None
         try:
             async with async_timeout.timeout(DEFAULT_TIMEOUT, loop=self.loop):
-                response = await self.websession.get(
-                    BASE + ",".join(self._symbols)
-                )
+                response = await self.websession.get(BASE + ",".join(self._symbols))
                 json = await response.json()
 
             _LOGGER.debug("Data = %s", json)
@@ -251,7 +250,9 @@ async def update(self):
                     "financialCurrency": item.get("financialCurrency"),
                 }
                 _LOGGER.debug(
-                    "Updated %s=%s", symbol, data[symbol]["regularMarketPrice"],
+                    "Updated %s=%s",
+                    symbol,
+                    data[symbol]["regularMarketPrice"],
                 )
 
             self.data = data