This is some basic code that will print a list of files on the SD card and load a given text files contents. Then it converts the JSON text into a dictionary that makes it easy to list out and display values.<\/p>\n\n\n\n
import time\nimport json\n\nimport os\nimport board\nfrom adafruit_pyportal import PyPortal\n\n# Create the PyPortal object\npyportal = PyPortal(status_neopixel=board.NEOPIXEL)\n\n# Default location to look is in internal memory\nFILE_DIRECTORY = \"\/sd\"\n\nRECIPE_FILE = \"Cookies\"\n\ndef print_directory(path, tabs=0):\n for file in os.listdir(path):\n stats = os.stat(path + \"\/\" + file)\n filesize = stats[6]\n isdir = stats[0] & 0x4000\n\n if filesize < 1000:\n sizestr = str(filesize) + \" by\"\n elif filesize < 1000000:\n sizestr = \"%0.1f KB\" % (filesize \/ 1000)\n else:\n sizestr = \"%0.1f MB\" % (filesize \/ 1000000)\n\n prettyprintname = \"\"\n for _ in range(tabs):\n prettyprintname += \" \"\n prettyprintname += file\n if isdir:\n prettyprintname += \"\/\"\n print('{0:<20} Size: {1:>6}'.format(prettyprintname, sizestr))\n\n # recursively print directory contents\n if isdir:\n print_directory(path + \"\/\" + file, tabs + 1)\n\ntry:\n print_directory(FILE_DIRECTORY)\nexcept OSError as error:\n raise Exception(\"No files found on flash or SD Card\")\n \ntry:\n with open(\"\/sd\/\" + RECIPE_FILE + \".txt\", \"r\") as fp:\n x = fp.read()\n # parse x:\n y = json.loads(x)\n ingredients = y[\"ingredients\"]\n for i in ingredients:\n print('{} - {}'.format(i.get(\"quantity\"), i.get(\"ingredient\")))\n \nexcept OSError as e:\n raise Exception(\"Could not read text file.\")<\/code><\/pre>\n\n\n\nOn the MicroSD card there is a file named Cookies.txt that is made up of the following JSON.<\/p>\n\n\n\n
{\n \"ingredients\":[\n {\n \"quantity\":\"1 cup\",\n \"ingredient\":\"butter, softened\"\n },\n {\n \"quantity\":\"1 cup\",\n \"ingredient\":\"white sugar\"\n },\n {\n \"quantity\":\"1 cup\",\n \"ingredient\":\"packed brown sugar\"\n },\n {\n \"quantity\":\"Two\",\n \"ingredient\":\"eggs\"\n },\n {\n \"quantity\":\"2 tsp\",\n \"ingredient\":\"vanilla extract\"\n },\n {\n \"quantity\":\"1 tsp\",\n \"ingredient\":\"baking soda\"\n },\n {\n \"quantity\":\"2 tsp\",\n \"ingredient\":\"hot water\"\n },\n {\n \"quantity\":\"1\/2 tsp\",\n \"ingredient\":\"salt\"\n },\n {\n \"quantity\":\"3 cups\",\n \"ingredient\":\"all-purpose flour\"\n },\n {\n \"quantity\":\"2 cups\",\n \"ingredient\":\"semisweet chocolate chips\"\n },\n {\n \"quantity\":\"1 cup\",\n \"ingredient\":\"chopped walnuts\"\n }\n ]\n}<\/code><\/pre>\n\n\n\nThis should result in the following output:<\/p>\n\n\n\n
code.py output:\nESP firmware: bytearray(b'1.2.2\\x00')\nSet background to 0\nColeslaw Dressing.txt Size: 426 by\nBread Dough.txt Size: 426 by\nPancakes.txt Size: 426 by\nCookies.txt Size: 1.0 KB\n1 cup - butter, softened\n1 cup - white sugar\n1 cup - packed brown sugar\nTwo - eggs\n2 tsp - vanilla extract\n1 tsp - baking soda\n2 tsp - hot water\n1\/2 tsp - salt\n3 cups - all-purpose flour\n2 cups - semisweet chocolate chips\n1 cup - chopped walnuts<\/code><\/pre>\nShare this:<\/h3>