Merge pull request #908 from cal-itp/gtfs_quality_check

Gtfs quality check

Author: amandaha8

ah_starterkit/Untitled.ipynb

@@ -0,0 +1,151 @@
+{
+ "cells": [
+  {
+   "cell_type": "code",
+   "execution_count": 12,
+   "id": "3423feb2-b10a-4573-9c51-d91c1bbc9bf3",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from typing import Literal, cast"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "id": "e8758d7d-aaf3-4522-86eb-eb26d2d2596e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "hello_t = Literal['Hello there', 'Hello world']"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "id": "10b142a1-a184-4cb4-9e26-f52aad555c0a",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "typing.Literal['Hello there', 'Hello world']"
+      ]
+     },
+     "execution_count": 14,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "hello_t"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 15,
+   "id": "fcef3360-c76a-4340-a4b9-4c7857ff8a2f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def verify(word: Literal['there', 'world']) -> hello_t:\n",
+    "    a = cast(hello_t, word)\n",
+    "    return a"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "id": "c0a7c587-78b6-4939-a20c-9dcd087642ce",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "a = verify('there')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "id": "88135247-761c-4e98-98ba-d0850c17dfc9",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'there'"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "a"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "id": "822bd804-c832-4bd6-b08a-ac4eaaa2c831",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'world'"
+      ]
+     },
+     "execution_count": 18,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "verify('world')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "id": "997c2d77-c496-41d3-b6bc-5c61b46782ad",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "'candy'"
+      ]
+     },
+     "execution_count": 19,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "verify('candy')"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.13"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}