421 lines
9.9 KiB
Plaintext
421 lines
9.9 KiB
Plaintext
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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Grundlegende Datentypen und Operationen"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Numerische Typen"
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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": 3,
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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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"42\n",
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"23\n",
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"65\n"
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]
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}
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],
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"source": [
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"# Ganzzahlen (Integers)\n",
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"\n",
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"a = 42\n",
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"b = 23\n",
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"print(a)\n",
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"print(b)\n",
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"print(a + b)"
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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": "stdout",
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"output_type": "stream",
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"text": [
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"3.14159\n",
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"2.71828\n",
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"8.539721265199999\n"
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]
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}
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],
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"source": [
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"# Fließkommazahlen (Floats)\n",
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"\n",
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"pi = 3.14159\n",
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"e = 2.71828\n",
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"print(pi)\n",
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"print(type(pi))\n",
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"print(e)\n",
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"print(pi * e)"
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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": 1,
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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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"3 1.5 4.5\n",
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"<class 'float'>\n",
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"0.16666666666666666\n"
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]
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}
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],
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"source": [
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"# Implizite Umwandlung von numerischen Typen\n",
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"\n",
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"i = 3\n",
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"f = 1.5\n",
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"summe = a + f\n",
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"print(i, f, summe)\n",
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"print(type(e))\n",
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"z = 1\n",
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"n = 6\n",
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"print(z / 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": 3,
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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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"2\n",
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"999\n",
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"144\n",
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"8.0\n",
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"3.8\n",
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"1.0\n",
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"23.799999999999997\n",
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"0.3333333333333333\n"
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]
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}
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],
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"source": [
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"# Grundrechenarten\n",
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"\n",
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"# Integer\n",
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"print(1 + 1)\n",
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"print(1_000 - 1)\n",
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"print(12 * 12) # Vorsicht: Asterisk (\"Sternchen\"), nicht x)\n",
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"print(64 / 8)\n",
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"\n",
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"# Floats\n",
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"print(0.5 + 3.3)\n",
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"print(1.99 - 0.99)\n",
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"print(20.0 * 1.19)\n",
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"print(1.0 / 3.0)"
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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": 6,
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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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"64\n",
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"512\n",
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"512\n",
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"11585.237502960395\n"
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]
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}
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],
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"source": [
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"# X hoch Y\n",
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"\n",
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"x = 8\n",
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"x2 = x ** 2\n",
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"print(x2)\n",
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"print(x ** 3)\n",
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"print(pow(x, 3))\n",
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"\n",
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"print(x ** e)\n",
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"print(pow(x, e)) # pow akzeptiert integer und floats"
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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": 9,
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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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"1\n",
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"<class 'int'>\n"
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]
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}
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],
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"source": [
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"# Modulo\n",
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"\n",
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"x = 10\n",
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"y = 3\n",
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"rest = x % 3\n",
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"print(rest)\n",
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"print(type(rest))"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# Strings"
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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": 18,
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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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"Dies ist ein String!\n",
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"Man kann einfache oder doppelte Anführungszeichen verwenden.\n",
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"Innerhalb der Anführungszeichen kann man den jeweils \"anderen Typ\" verwenden\n",
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"Oder 'andersherum'.\n",
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"Alternativ kann man eine Backslash als \"Escape\"-Zeichen verwenden\n",
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"String-Literale, die direkt hintereinander, durch Leerzeichen getrennt, stehenwerden zusammengefügt.\n",
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"Mit Klammerung klapt das auch über mehrere Zeilen hinweg\n"
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]
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}
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],
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"source": [
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"s = \"Dies ist ein String!\"\n",
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"print(s)\n",
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"s2 = 'Man kann einfache oder doppelte Anführungszeichen verwenden.'\n",
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"print(s2)\n",
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"s3a = 'Innerhalb der Anführungszeichen kann man den jeweils \"anderen Typ\" verwenden'\n",
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"print(s3a)\n",
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"s3b = \"Oder 'andersherum'.\"\n",
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"print(s3b)\n",
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"s4 = \"Alternativ kann man eine Backslash als \\\"Escape\\\"-Zeichen verwenden\"\n",
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"print(s4)\n",
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"s5 = \"String-Literale\" \", die direkt hintereinander\" \", durch Leerzeichen getrennt, stehen\" \"werden zusammengefügt.\"\n",
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"print(s5)\n",
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"s6 = (\"Mit Klammerung klappt das auch \"\n",
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" \"über mehrere Zeilen \"\n",
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" \"hinweg\")\n",
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"print(s6)"
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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": 11,
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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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"Dies ist ein langer String (\"triple quoted string\").\n",
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"Er kann Zeilenumbrüche enthalten.\n",
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"\n",
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"Und Leerzeilen.\n",
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"\n",
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"Und auch 'einfache' oder \"doppelte\" Anführungszeichen.\n",
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"\n",
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"Er endet mit drei weiteren Anführungszeichen des gleichen Typs.\n",
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"\n",
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"'Dies ist ein langer String (\"triple quoted string\").\\nEr kann Zeilenumbrüche enthalten.\\n\\nUnd Leerzeilen.\\n\\nUnd auch \\'einfache\\' oder \"doppelte\" Anführungszeichen.\\n\\nEr endet mit drei weiteren Anführungszeichen des gleichen Typs.\\n'\n"
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]
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}
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],
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"source": [
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"# Längere Strings\n",
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"\n",
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"long_string = \"\"\"Dies ist ein langer String (\"triple quoted string\").\n",
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"Er kann Zeilenumbrüche enthalten.\n",
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"\n",
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"Und Leerzeilen.\n",
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"\n",
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"Und auch 'einfache' oder \"doppelte\" Anführungszeichen.\n",
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"\n",
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"Er endet mit drei weiteren Anführungszeichen des gleichen Typs.\n",
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"\"\"\"\n",
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"print(long_string)\n",
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"print(repr(long_string))"
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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": 15,
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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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"Erste Zeile\n",
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"Zweite Zeile\n",
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"Eine Zeile\n",
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"Noch eine Zeile\n",
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"Eins\tZwei\tDrei\n",
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"1\t2\t3\n",
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"'Dieser String enthält ein\\x00Null-Zeichen'\n",
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"Hexadezimal-Codes können wir druckbare (e.g. '@') und nicht druckbare Zeichen (e.g. ) verwendet werden.\n",
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"❤\n"
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]
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}
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],
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"source": [
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"# Escape Sequenzen\n",
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"\n",
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"# Zeilenumbrüche und Tabs\n",
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"print(\"Erste Zeile\\r\\nZweite Zeile\") # Zeilenumbruch nach Windows-Art \n",
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"print(\"Eine Zeile\\nNoch eine Zeile\") # Rest der Welt ;-)\n",
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"print(\"Eins\\tZwei\\tDrei\")\n",
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"print(\"1\\t2\\t3\")\n",
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"\n",
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"# Null und Hexadezimal- und Unicode-Sequenzen\n",
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"print(repr(\"Dieser String enthält ein\\0Null-Zeichen\"))\n",
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"print(\"Hexadezimal-Codes können wir druckbare (e.g. '\\x40') und nicht druckbare Zeichen (e.g. \\x7F) verwendet werden.\")\n",
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"print('\\u2764') # Unicode"
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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": 19,
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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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"Dies ist der erste String.Und dies der zweite.\n",
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"Ich habe es dir schon dreimal gesagt!Ich habe es dir schon dreimal gesagt!Ich habe es dir schon dreimal gesagt!\n"
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]
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}
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],
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"source": [
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"# String-Operationen\n",
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"\n",
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"s1 = \"Dies ist der erste String.\"\n",
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"s2 = \"Und dies der zweite.\"\n",
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"s3 = s1 + s2\n",
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"print(s3)\n",
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"s4 = \"Ich habe es dir schon dreimal gesagt! \"\n",
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"print(s4 * 3)"
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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": 21,
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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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"SCHREI NICHT SO LAUT!\n",
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"True\n",
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"True\n",
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"True\n"
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]
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}
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],
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"source": [
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"klein = \"schrei nicht so laut!\"\n",
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"print(klein.upper())\n",
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"print(\"hallo\" == \"HALLO\".lower())\n",
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"print(\"hallo\" == \"Hallo\".lower())\n",
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"print(\"straße\".upper() == \"STRASSE\")\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": 23,
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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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"Hallo\n",
|
|||
|
|
"a\n",
|
|||
|
|
"Hello\n"
|
|||
|
|
]
|
|||
|
|
}
|
|||
|
|
],
|
|||
|
|
"source": [
|
|||
|
|
"hallo = \"Hallo\"\n",
|
|||
|
|
"print(hallo)\n",
|
|||
|
|
"print(hallo[1])\n",
|
|||
|
|
"print(hallo[0] + 'e' + hallo[2:])"
|
|||
|
|
]
|
|||
|
|
},
|
|||
|
|
{
|
|||
|
|
"cell_type": "code",
|
|||
|
|
"execution_count": 24,
|
|||
|
|
"metadata": {},
|
|||
|
|
"outputs": [
|
|||
|
|
{
|
|||
|
|
"ename": "TypeError",
|
|||
|
|
"evalue": "'str' object does not support item assignment",
|
|||
|
|
"output_type": "error",
|
|||
|
|
"traceback": [
|
|||
|
|
"\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
|
|||
|
|
"\u001b[0;31mTypeError\u001b[0m Traceback (most recent call last)",
|
|||
|
|
"\u001b[1;32m/home/chris/work/python-kurs-softed/notebooks/basictypes.ipynb Cell 16\u001b[0m line \u001b[0;36m3\n\u001b[1;32m <a href='vscode-notebook-cell:/home/chris/work/python-kurs-softed/notebooks/basictypes.ipynb#X23sZmlsZQ%3D%3D?line=0'>1</a>\u001b[0m \u001b[39m# Aber das geht nicht:\u001b[39;00m\n\u001b[0;32m----> <a href='vscode-notebook-cell:/home/chris/work/python-kurs-softed/notebooks/basictypes.ipynb#X23sZmlsZQ%3D%3D?line=2'>3</a>\u001b[0m hallo[\u001b[39m1\u001b[39;49m] \u001b[39m=\u001b[39m \u001b[39m'\u001b[39m\u001b[39me\u001b[39m\u001b[39m'\u001b[39m\n",
|
|||
|
|
"\u001b[0;31mTypeError\u001b[0m: 'str' object does not support item assignment"
|
|||
|
|
]
|
|||
|
|
}
|
|||
|
|
],
|
|||
|
|
"source": [
|
|||
|
|
"# Aber das geht nicht!:\n",
|
|||
|
|
"\n",
|
|||
|
|
"hallo[1] = 'e'"
|
|||
|
|
]
|
|||
|
|
}
|
|||
|
|
],
|
|||
|
|
"metadata": {
|
|||
|
|
"kernelspec": {
|
|||
|
|
"display_name": "softed",
|
|||
|
|
"language": "python",
|
|||
|
|
"name": "softed"
|
|||
|
|
},
|
|||
|
|
"language_info": {
|
|||
|
|
"codemirror_mode": {
|
|||
|
|
"name": "ipython",
|
|||
|
|
"version": 3
|
|||
|
|
},
|
|||
|
|
"file_extension": ".py",
|
|||
|
|
"mimetype": "text/x-python",
|
|||
|
|
"name": "python",
|
|||
|
|
"nbconvert_exporter": "python",
|
|||
|
|
"pygments_lexer": "ipython3",
|
|||
|
|
"version": "3.11.8"
|
|||
|
|
}
|
|||
|
|
},
|
|||
|
|
"nbformat": 4,
|
|||
|
|
"nbformat_minor": 2
|
|||
|
|
}
|