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Commit 1b66c5a

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‎.gitignore‎

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.ipynb_checkpoints/

‎0. intro.pdf‎

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‎1. Basics.ipynb‎

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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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},
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"source": [
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"# Basics"
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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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"deletable": true,
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"editable": true
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},
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"source": [
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"## Let's write our first \"Hello world!\" program :)\n",
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"\n",
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"- Run on interactive shell\n",
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"\n",
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"- Run as python script\n",
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"\n",
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"[Let's solve our first challenge!](https://www.hackerrank.com/challenges/py-hello-world)"
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]
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},
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{
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"cell_type": "code",
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"## Putting comments\n",
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"\n",
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"\n",
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"![](images/comments.jpg)\n",
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"\n",
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"> Code tells you how, comments should tell you why.\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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},
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"outputs": [],
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"## Literal constants\n",
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"\n",
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"- Numbers\n",
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" - Integers\n",
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" - Floats\n",
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"- Strings\n",
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" - Single quotes\n",
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" - Double quotes\n",
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" - Triple quotes\n",
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" - Escape sequences (\\n, \\t, \\r)\n",
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" - Explicit line joining"
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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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},
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"## Variables\n",
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"\n",
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"A type of **identifier**.\n",
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"\n",
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"Rules for naming identifiers:\n",
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"\n",
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"- The first character of the identifier must be a letter of the alphabet (uppercase ASCII or lowercase ASCII or Unicode character) or an underscore (_).\n",
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" \n",
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"- The rest of the identifier name can consist of letters (uppercase ASCII or lowercase ASCII or Unicode character), underscores (_) or digits (0-9).\n",
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" \n",
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"- Identifier names are case-sensitive. For example, myname and myName are not the same. Note the lowercase n in the former and the uppercase N in the latter.\n",
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" \n",
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"Examples of valid identifier names are i, name_2_3. \n",
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"\n",
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"\n",
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"Examples of invalid identifier names are 2things, this is spaced out, my-name and >a1b2_c3."
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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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"deletable": true,
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"editable": true
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},
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"outputs": [],
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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},
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"source": [
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"## Data Types\n",
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"\n",
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"Variables can hold values of different types called data types. \n",
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"\n",
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"The basic types:\n",
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"- numbers\n",
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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": null,
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"metadata": {
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"## Indentation\n",
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"\n",
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"![](images/indent.jpg)\n",
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"\n",
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"- Whitespace is important in Python. \n",
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"\n",
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"- Actually, whitespace at the beginning of the line is important. This is called indentation. \n",
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"\n",
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"- Leading whitespace (spaces and tabs) at the beginning of the logical line is used to determine the indentation level of the logical line, which in turn is used to determine the grouping of statements.\n",
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"\n",
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"- This means that statements which go together must have the same indentation. Each such set of statements is called a block."
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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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"deletable": true,
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},
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"outputs": [],
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},
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{
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"cell_type": "markdown",
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"## Issue with indentation\n",
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"\n",
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"### Tabs vs spaces\n",
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"\n",
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"![](images/tabs_vs_spaces.jpg)\n",
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"\n",
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"### The solution...\n",
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"\n",
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"![](images/usetabs.jpeg)"
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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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"deletable": true,
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"editable": true
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},
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"source": [
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"## Something more about print function...\n",
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"\n",
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"- format method\n",
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"\n",
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"- **end** and **sep**"
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]
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},
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{
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"metadata": {
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"deletable": true,
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"editable": true
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},
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"source": [
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"## Taking user input\n",
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"\n",
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"- input() function\n",
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"\n",
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"- concept of typecasting"
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]
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},
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{
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"display_name": "Python 3",
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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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"version": "3.5.2+"
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}
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"nbformat": 4,
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