forked from tdwojak/Python2017
602 lines
11 KiB
Plaintext
602 lines
11 KiB
Plaintext
{
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"# Ogólne wprowadzenie do Pythona\n",
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"\n",
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" \n",
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"\n",
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"## 13 maja 2017"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Hello Python!"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"print('Hello Python')\n",
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"print(10) \n",
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"print(3.14)\n",
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"print(123456789 * 987654321)\n",
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"print(10 ** 20)\n",
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"print(12 ** (3 + 4 *(567 % 8) / 9))\n",
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"print(\"PI\", \"jest prawie równe \", 3.1415)"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Komentarze\n",
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" * Komentarze w Pythonie zaczynają się od '#',\n",
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" * Komentarze nie są interpretowane."
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"print(\"Ala ma kota.\") # A to jest komentarz\n",
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"# print(\"Nie chcę być wydrukowanym\")"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Zmienne\n",
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" * case sensitive,\n",
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" * brak deklaracji typu,\n",
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" * do zmiennej można przypisać każdy obiekt"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"zmienna = \"Zmienna\"\n",
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"zmienna = 10 ** 44\n",
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"ocena_z_pythona = 5\n",
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"pi = 3.1415\n",
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"imie_prowadzacego = 'Tomek'\n",
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"nazwisko_prowadzego = \"Dwojak\"\n",
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"czy_lubie_pythona = True # False "
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"print(type(ocena_z_pythona))\n",
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"print(type(pi))\n",
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"print(type(imie_prowadzacego))\n",
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"print(type(nazwisko_prowadzego))\n",
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"print(type(czy_lubie_pythona))"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Listy\n",
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" * W Pythonie nie ma tablic, są listy;\n",
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" * Listy mogą przechowywać elementy różnych typów;\n",
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" * Indeksowanie zaczyna się od 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": null,
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"metadata": {
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"collapsed": false,
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"slideshow": {
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"slide_type": "slide"
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}
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},
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"outputs": [],
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"source": [
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"pusta_lista = [] # albo równoważnie pusta_lista = list()\n",
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"oceny = [5, 4, 3, 5, 5]\n",
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"roznosci = [3.14, \"pi\", [\"pi\"], 3]\n",
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"ciag_10_elem = range(10)\n",
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"\n",
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"print(\"ciąg:\", ciag_10_elem)\n",
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"print(\"rożności:\", roznosci)"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Dodawanie i usuwanie elementów z listy"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"oceny.append(4) # Dodanie elementu na koniec\n",
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"print(oceny)"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"oceny.extend([4,4,4]) # Rozszerzenie o inną listę\n",
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"print(oceny)"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"oceny.pop(4) # Domyślnie usuwa ostatni element z listy\n",
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"print(oceny)"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Indeksowanie"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"print(oceny)\n",
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"print('pierwszy element:', oceny[0])\n",
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"print('ostatni element:', oceny[-1])\n",
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"print('5 pierwszych:', oceny[:5])\n",
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"print('5 ostatnich', oceny[-5:])\n",
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"print('od drugiego, do piątego', oceny[1:5])\n",
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"print('parzyste:', oceny[::2])\n",
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"print('od tyłu', oceny[::-1])"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Co możemy zrobić z listą?"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"oceny.sort()\n",
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"print(oceny)\n",
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"oceny.reverse()\n",
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"print(\"liczba piątek\", oceny.count(5))"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Pętla typu ```for```\n",
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" * W Pythonie pętla *for* działa jak pętla *for each* w innych językach;\n",
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" * W Pythonie nie ma klamr, ani *begin* i *end*; jako ciało pętli musi być wcięte (najcześciej 4 spacje)."
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"for i in range(10):# range[5] = [0,1,2,3,4]\n",
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" pass\n",
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" \n",
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"print('element:', i) # Uwaga wcięcie!\n",
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"print('sqr:', i **2) # Uwaga wcięcie!"
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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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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"source": [
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"Schemat:"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"for zmienna in lista:\n",
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" # jakiś kod"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"for ocena in oceny:\n",
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" print(\"Ocena:\", ocena)"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Lista kwadratów"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"kwadraty = []\n",
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"for i in range(10):\n",
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" kwadraty.append(i ** 2)\n",
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"print(kwadraty)\n",
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"print(kwadraty[5])"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Słowniki, czyli mapy"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"slownik = {}\n",
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"s_oceny = {\"Justyna\" : [5,5,5], \"Bartek\" : [3,4,5], \"Ola\": [3,3,3]}\n",
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"print(s_oceny)\n",
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"s_oceny[1234567890] = [3,4,5]\n",
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"#print(\"ADAM:\", s_oceny[\"Adam\"])\n",
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"print(s_oceny)"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"s_oceny['Ala'] = [2,2,2,4,4,4,3,3,3]\n",
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"print(s_oceny)"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Iterowanie po słowniku"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"for osoba in s_oceny:\n",
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" print(osoba,':', s_oceny[osoba])"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"for osoba, oceny in s_oceny.items():\n",
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" print(osoba,':', oceny)"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Instrukcja sterująca ```if ... else```"
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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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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"source": [
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" * działa tak samo, jak w innych języka;\n",
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" * jest dodatkowa instrukcja następnego warunku *elif...*;"
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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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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"zmienna = 7\n",
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"if zmienna < 0:\n",
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" print(\"Ujemna!\")\n",
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"elif zmienna == 0:\n",
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" print(\"Zero!\")\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": null,
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"metadata": {
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"collapsed": false,
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"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"if \"Ala\" in s_oceny:\n",
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" print(\"Ala jest w grupie!\")\n",
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"else:\n",
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" print(\"Niestety Ali nie ma grupie!\")"
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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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"slideshow": {
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"slide_type": "slide"
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}
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},
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"source": [
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"## Funkcje"
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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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|
"collapsed": false,
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|
"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"def is_greater_than_5(x):\n",
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" if x > 5:\n",
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" return True\n",
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" else:\n",
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" return False"
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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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|
"collapsed": false,
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|
"slideshow": {
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"slide_type": "fragment"
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}
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},
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"outputs": [],
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"source": [
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"print(is_greater_than_5(5))\n",
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"print(is_greater_than_5(-100))\n",
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"print(is_greater_than_5(500))"
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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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|
"collapsed": true
|
|
},
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|
"outputs": [],
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"source": []
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|
}
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|
],
|
|
"metadata": {
|
|
"celltoolbar": "Slideshow",
|
|
"kernelspec": {
|
|
"display_name": "Python 3",
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|
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