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213 lines
9.0 KiB
213 lines
9.0 KiB
{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 8,
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"metadata": {},
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"outputs": [
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{
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"ename": "OperationalError",
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"evalue": "unable to open database file",
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"output_type": "error",
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"traceback": [
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"\u001b[31m---------------------------------------------------------------------------\u001b[39m",
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"\u001b[31mOperationalError\u001b[39m Traceback (most recent call last)",
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"\u001b[36mCell\u001b[39m\u001b[36m \u001b[39m\u001b[32mIn[8]\u001b[39m\u001b[32m, line 40\u001b[39m\n\u001b[32m 37\u001b[39m conn.close()\n\u001b[32m 38\u001b[39m \u001b[38;5;28;01mreturn\u001b[39;00m (\u001b[33m\"\u001b[39m\u001b[33mTable \u001b[39m\u001b[33m'\u001b[39m\u001b[33mlight\u001b[39m\u001b[33m'\u001b[39m\u001b[33m does NOT exist.\u001b[39m\u001b[33m\"\u001b[39m, [])\n\u001b[32m---> \u001b[39m\u001b[32m40\u001b[39m init_message = \u001b[43minit_db\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n\u001b[32m 41\u001b[39m check_message, schema_info = check_db()\n\u001b[32m 43\u001b[39m init_message, check_message, schema_info\n",
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"\u001b[36mCell\u001b[39m\u001b[36m \u001b[39m\u001b[32mIn[8]\u001b[39m\u001b[32m, line 5\u001b[39m, in \u001b[36minit_db\u001b[39m\u001b[34m()\u001b[39m\n\u001b[32m 4\u001b[39m \u001b[38;5;28;01mdef\u001b[39;00m\u001b[38;5;250m \u001b[39m\u001b[34minit_db\u001b[39m():\n\u001b[32m----> \u001b[39m\u001b[32m5\u001b[39m conn = \u001b[43msqlite3\u001b[49m\u001b[43m.\u001b[49m\u001b[43mconnect\u001b[49m\u001b[43m(\u001b[49m\u001b[33;43m'\u001b[39;49m\u001b[33;43msrc\u001b[39;49m\u001b[38;5;130;43;01m\\\\\u001b[39;49;00m\u001b[33;43mlight.db\u001b[39;49m\u001b[33;43m'\u001b[39;49m\u001b[43m)\u001b[49m\n\u001b[32m 6\u001b[39m c = conn.cursor()\n\u001b[32m 8\u001b[39m \u001b[38;5;66;03m# Create the 'light' table if it doesn't already exist\u001b[39;00m\n",
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"\u001b[31mOperationalError\u001b[39m: unable to open database file"
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]
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}
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],
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"source": [
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"import sqlite3\n",
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"\n",
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"# Initialize the database and table\n",
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"def init_db():\n",
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" conn = sqlite3.connect('src\\\\light.db')\n",
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" c = conn.cursor()\n",
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"\n",
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" # Create the 'light' table if it doesn't already exist\n",
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" c.execute('''\n",
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" CREATE TABLE IF NOT EXISTS light (\n",
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" id INTEGER PRIMARY KEY AUTOINCREMENT,\n",
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" devicename CHARACTER(5) NOT NULL,\n",
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" light INTEGER NOT NULL,\n",
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" timestamp DATETIME NOT NULL,\n",
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" tocloud BOOLEAN DEFAULT 0 NOT NULL\n",
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" )\n",
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" ''')\n",
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"\n",
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" conn.commit()\n",
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" conn.close()\n",
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" return \"Database initialized and table 'light' is ready.\"\n",
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"\n",
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"# Check if the table exists and print the schema\n",
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"def check_db():\n",
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" conn = sqlite3.connect('src\\\\light.db')\n",
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" c = conn.cursor()\n",
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"\n",
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" c.execute(\"SELECT name FROM sqlite_master WHERE type='table' AND name='light';\")\n",
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" table_exists = c.fetchone()\n",
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"\n",
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" if table_exists:\n",
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" c.execute(\"PRAGMA table_info(light);\")\n",
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" columns = c.fetchall()\n",
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" conn.close()\n",
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" return (\"Table 'light' exists.\", columns)\n",
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" else:\n",
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" conn.close()\n",
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" return (\"Table 'light' does NOT exist.\", [])\n",
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"\n",
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"init_message = init_db()\n",
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"check_message, schema_info = check_db()\n",
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"\n",
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"init_message, check_message, schema_info\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"metadata": {},
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"outputs": [
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{
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"name": "stderr",
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"output_type": "stream",
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"text": [
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"<>:3: SyntaxWarning: invalid escape sequence '\\l'\n",
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"<>:3: SyntaxWarning: invalid escape sequence '\\l'\n",
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"C:\\Users\\LittleLishu\\AppData\\Local\\Temp\\ipykernel_22052\\2500929216.py:3: SyntaxWarning: invalid escape sequence '\\l'\n",
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" conn = sqlite3.connect('src\\light.db')\n"
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]
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},
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{
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"ename": "OperationalError",
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"evalue": "unable to open database file",
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"output_type": "error",
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"traceback": [
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"\u001b[31m---------------------------------------------------------------------------\u001b[39m",
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"\u001b[31mOperationalError\u001b[39m Traceback (most recent call last)",
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"\u001b[36mCell\u001b[39m\u001b[36m \u001b[39m\u001b[32mIn[4]\u001b[39m\u001b[32m, line 18\u001b[39m\n\u001b[32m 15\u001b[39m conn.close()\n\u001b[32m 16\u001b[39m \u001b[38;5;28;01mreturn\u001b[39;00m (\u001b[33m\"\u001b[39m\u001b[33mTable \u001b[39m\u001b[33m'\u001b[39m\u001b[33mlight\u001b[39m\u001b[33m'\u001b[39m\u001b[33m does NOT exist.\u001b[39m\u001b[33m\"\u001b[39m, [])\n\u001b[32m---> \u001b[39m\u001b[32m18\u001b[39m check_message, schema_info = \u001b[43mcheck_db\u001b[49m\u001b[43m(\u001b[49m\u001b[43m)\u001b[49m\n\u001b[32m 19\u001b[39m check_message, schema_info\n",
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"\u001b[36mCell\u001b[39m\u001b[36m \u001b[39m\u001b[32mIn[4]\u001b[39m\u001b[32m, line 3\u001b[39m, in \u001b[36mcheck_db\u001b[39m\u001b[34m()\u001b[39m\n\u001b[32m 2\u001b[39m \u001b[38;5;28;01mdef\u001b[39;00m\u001b[38;5;250m \u001b[39m\u001b[34mcheck_db\u001b[39m():\n\u001b[32m----> \u001b[39m\u001b[32m3\u001b[39m conn = \u001b[43msqlite3\u001b[49m\u001b[43m.\u001b[49m\u001b[43mconnect\u001b[49m\u001b[43m(\u001b[49m\u001b[33;43m'\u001b[39;49m\u001b[33;43msrc\u001b[39;49m\u001b[33;43m\\\u001b[39;49m\u001b[33;43mlight.db\u001b[39;49m\u001b[33;43m'\u001b[39;49m\u001b[43m)\u001b[49m\n\u001b[32m 4\u001b[39m c = conn.cursor()\n\u001b[32m 6\u001b[39m c.execute(\u001b[33m\"\u001b[39m\u001b[33mSELECT name FROM sqlite_master WHERE type=\u001b[39m\u001b[33m'\u001b[39m\u001b[33mtable\u001b[39m\u001b[33m'\u001b[39m\u001b[33m AND name=\u001b[39m\u001b[33m'\u001b[39m\u001b[33mlight\u001b[39m\u001b[33m'\u001b[39m\u001b[33m;\u001b[39m\u001b[33m\"\u001b[39m)\n",
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"\u001b[31mOperationalError\u001b[39m: unable to open database file"
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]
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}
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],
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"source": [
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"import sqlite3\n",
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"def check_db():\n",
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" conn = sqlite3.connect('src\\light.db')\n",
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" c = conn.cursor()\n",
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"\n",
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" c.execute(\"SELECT name FROM sqlite_master WHERE type='table' AND name='light';\")\n",
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" table_exists = c.fetchone()\n",
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"\n",
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" if table_exists:\n",
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" c.execute(\"PRAGMA table_info(light);\")\n",
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" columns = c.fetchall()\n",
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" conn.close()\n",
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" return (\"Table 'light' exists.\", columns)\n",
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" else:\n",
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" conn.close()\n",
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" return (\"Table 'light' does NOT exist.\", [])\n",
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"\n",
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"check_message, schema_info = check_db()\n",
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"check_message, schema_info"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 5,
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"Tables in the database:\n",
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"light\n",
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"sqlite_sequence\n",
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"Empty DataFrame\n",
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"Columns: [id, devicename, light, timestamp, tocloud]\n",
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"Index: []\n"
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]
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}
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],
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"source": [
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"import sqlite3\n",
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"import pandas as pd\n",
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"\n",
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"db_path = r\"D:\\OneDrive - National University of Singapore\\Document\\NUSCourses\\Semester 2\\IS5451 AloT Solutions and Development\\Mock\\src\\lighttest.db\"\n",
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"\n",
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"conn = sqlite3.connect(db_path)\n",
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"\n",
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"cursor = conn.cursor()\n",
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"\n",
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"# 获取所有表名\n",
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"cursor.execute(\"SELECT name FROM sqlite_master WHERE type='table';\")\n",
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"tables = cursor.fetchall()\n",
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"\n",
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"print(\"Tables in the database:\")\n",
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"for table in tables:\n",
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" print(table[0])\n",
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"\n",
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"df = pd.read_sql_query(\"SELECT * FROM light\", conn)\n",
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"\n",
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"print(df)\n",
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"\n",
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"conn.close()\n"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 14,
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"metadata": {},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"'d:\\\\OneDrive - National University of Singapore\\\\Document\\\\NUSCourses\\\\Semester 2\\\\IS5451 AloT Solutions and Development\\\\Mock\\\\src'"
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]
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},
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"execution_count": 14,
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"metadata": {},
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"output_type": "execute_result"
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}
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],
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"source": [
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"import os\n",
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"os.getcwd()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"# 将txt的command写入light.db，在树莓派上运行\n",
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"sqlite3 light.db < sqlite.txt"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "is5451",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.13.2"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}
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