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python-basic-01.ipynb
{
"nbformat": 4,
"nbformat_minor": 0,
"metadata": {
"colab": {
"name": "python-basic.ipynb",
"provenance": [],
"collapsed_sections": [],
"authorship_tag": "ABX9TyOLyWQWBGw+S8osbX/oVHKq",
"include_colab_link": true
},
"kernelspec": {
"name": "python3",
"display_name": "Python 3"
},
"language_info": {
"name": "python"
}
},
"cells": [
{
"cell_type": "markdown",
"metadata": {
"id": "view-in-github",
"colab_type": "text"
},
"source": [
"<a href=\"https://colab.research.google.com/gist/scobin/d0e86f99a55c023259e2c6d8e8c6fb52/python-basic.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
]
},
{
"cell_type": "code",
"source": [
"!python --version"
],
"metadata": {
"id": "dqqB52NAy-W2",
"outputId": "09cad819-10af-4434-a73b-2341ee31933e",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"execution_count": 36,
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"Python 3.7.13\n"
]
}
]
},
{
"cell_type": "markdown",
"source": [
"#輸出：print\n",
"\n",
"```\n",
"print(object(s), sep=separator, end=end, file=file, flush=flush)\n",
"```\n",
"\n",
"ex:\n",
"print(\"Hi 我有一個部落格，名稱是cyublog\")\n",
"\n",
"## Ref:\n",
"- https://www.w3schools.com/python/ref_func_print.asp\n"
],
"metadata": {
"id": "jKXqEvWWZy4P"
}
},
{
"cell_type": "code",
"execution_count": 40,
"metadata": {
"id": "2wdeYTE0ZSXR",
"outputId": "f5f4c249-8aa9-4cb5-c8ea-c8159e3e982f",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"Hi 我有一個部落格，名稱是cyublog,歡迎參觀。"
]
}
],
"source": [
"print(\"Hi 我有一個部落格，名稱是cyublog\", \"歡迎參觀\", sep=\",\", end=\"。\")"
]
},
{
"cell_type": "markdown",
"source": [
"# 變數 variable \n",
"命名： \n",
"- 變數名稱第一個字母不為數字。\n",
"- 變數名稱第一個字母不為大多數的符號，例如*$, #, @*等。但是可以使用***底線_***, 例如：_name, _age。\n",
"- 變數名稱中不能有空白。\n",
"- 區分大小寫。\n",
"\n",
"\n"
],
"metadata": {
"id": "PYK_nPRiaLhB"
}
},
{
"cell_type": "code",
"source": [
"name = \"cyu\"\n",
"NAME = \"CYU\"\n",
"print(name)\n",
"print(NAME)"
],
"metadata": {
"id": "iCrf86FQeOJk",
"outputId": "287a87db-742a-4f3d-9d79-b3546bcfc74a",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"execution_count": 57,
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"cyu\n",
"CYU\n"
]
}
]
},
{
"cell_type": "markdown",
"source": [
"想要讓部落格名稱是非固定的、可變動時，設定變數可以達成效果。 \n",
"```\n",
"我有部落格，名稱是ooo \n",
"```\n",
"\n",
"把ooo的部分做為一個變數，就可以隨時變更他的值。\n",
"\n",
"print(變數)：列出變數內容。 \n",
"\n",
"```\n",
"print(\"我有部落格，名稱是\", blog)\n",
"print(\"我有部落格，名稱是{}\".format(blog))\n",
"print(f\"我有部落格，名稱是{blog}\")\n",
"print(\"我有部落格，名稱是\" + blog)\n",
"```\n",
"\n",
"format方法\n",
"```\n",
"string.format(value1, value2...)\n",
"```\n",
"## Ref\n",
"https://www.w3schools.com/python/ref_string_format.asp"
],
"metadata": {
"id": "4B1bwnZhnBpj"
}
},
{
"cell_type": "code",
"source": [
"blog = \"cyublog\"\n",
"print(\"我有部落格，名稱是\", blog, sep=\"\")\n",
"print(\"我有部落格，名稱是{}\".format(blog))\n",
"print(f\"我有部落格，名稱是{blog}\")\n",
"print(\"我有部落格，名稱是\" + blog)"
],
"metadata": {
"id": "boVF0mGfbPRE",
"outputId": "a6132576-fb4d-4498-f6d7-7af04b9fe7ab",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"execution_count": 59,
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"我有部落格，名稱是cyublog\n",
"我有部落格，名稱是cyublog\n",
"我有部落格，名稱是cyublog\n",
"我有部落格，名稱是cyublog\n"
]
}
]
},
{
"cell_type": "markdown",
"source": [
"#四則運算: +, -, *, /\n",
"數字的加減乘除"
],
"metadata": {
"id": "6MBixOWAlqSB"
}
},
{
"cell_type": "code",
"source": [
"print(1+1)\n",
"print(5-3)\n",
"print(12*3)\n",
"print(33/11)"
],
"metadata": {
"id": "Zl76SzxMlzBb",
"outputId": "a9c5b03e-0ade-44b0-9525-7cf72b005430",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"execution_count": 60,
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"2\n",
"2\n",
"36\n",
"3.0\n"
]
}
]
},
{
"cell_type": "markdown",
"source": [
"#輸入: input\n",
"\n",
"```\n",
"input(prompt)\n",
"```\n",
"\n",
"讓使用者輸入內容，返回輸入的文字。 \n",
"如果想將內容轉換為數字可以使用int()方法，將文字轉成數字。 "
],
"metadata": {
"id": "0s4pSGtDrVt5"
}
},
{
"cell_type": "code",
"source": [
"a = input('輸入一個數字')\n",
"print(type(a))\n",
"print(a)"
],
"metadata": {
"id": "TeXQOsaiwZNS",
"outputId": "e61a52dd-afa0-45fd-bd93-0f3fb483e0ce",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"execution_count": 62,
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"輸入一個數字12\n",
"<class 'str'>\n",
"12\n"
]
}
]
},
{
"cell_type": "markdown",
"source": [
"#BMI計算\n",
"\n",
"BMI = 體重(kg)/( 身高(m)*身高(m) )"
],
"metadata": {
"id": "SZA5rUngrCBf"
}
},
{
"cell_type": "code",
"source": [
"weight = int(input('輸入體重(kg)：'))\n",
"height = float(input('輸入身高(m)：'))\n",
"bmi = weight/(height*height)\n",
"print(bmi)"
],
"metadata": {
"id": "bMRckpI6rH52",
"outputId": "d41e8b84-c979-45d2-a7df-c549a2063068",
"colab": {
"base_uri": "https://localhost:8080/",
"height": 244
}
},
"execution_count": 64,
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"輸入體重(kg)：ee\n"
]
},
{
"output_type": "error",
"ename": "ValueError",
"evalue": "ignored",
"traceback": [
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
"\u001b[0;31mValueError\u001b[0m Traceback (most recent call last)",
"\u001b[0;32m<ipython-input-64-65b1c7f56efd>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m()\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mweight\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'輸入體重(kg)：'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m 2\u001b[0m \u001b[0mheight\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mfloat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0minput\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'輸入身高(m)：'\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 3\u001b[0m \u001b[0mbmi\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mweight\u001b[0m\u001b[0;34m/\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mheight\u001b[0m\u001b[0;34m*\u001b[0m\u001b[0mheight\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m 4\u001b[0m \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mbmi\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
"\u001b[0;31mValueError\u001b[0m: invalid literal for int() with base 10: 'ee'"
]
}
]
},
{
"cell_type": "code",
"source": [
"try:\n",
" weight = int(input('輸入體重(kg)：'))\n",
" height = float(input('輸入身高(m)：'))\n",
" bmi = weight/(height*height)\n",
" print(bmi)\n",
"except ValueError:\n",
" print('請輸入正確數字。')"
],
"metadata": {
"id": "1aNdbAc20Z9D",
"outputId": "81d269ab-49f7-4246-9486-5e4e686b68a7",
"colab": {
"base_uri": "https://localhost:8080/"
}
},
"execution_count": 68,
"outputs": [
{
"output_type": "stream",
"name": "stdout",
"text": [
"輸入體重(kg)：abc\n",
"請輸入正確數字。\n"
]
}
]
}
]
}
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