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Chapter programs, snippets and solutions to Challenges
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‎chapter1/Chapter1.html‎

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‎chapter1/Chapter1.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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"source": [
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"##Snippets and Programs from Chapter 1: Numbers\n",
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"\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": 15,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"Fraction(3, 4)"
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]
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},
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"execution_count": 15,
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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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"# P5: fractions demo\n",
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">>> from fractions import Fraction\n",
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">>> f = Fraction(3, 4)\n",
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"f"
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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": 16,
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"metadata": {
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"collapsed": false
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},
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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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"Enter a complex number: 2+3j\n"
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]
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},
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{
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"data": {
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"text/plain": [
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"(2+3j)"
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]
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},
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"execution_count": 16,
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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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"#P12: Complex number input\n",
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">>> z = complex(input('Enter a complex number: ')) #2+3j is valid, 2 + 3j is invalid\n",
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"z"
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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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"collapsed": false
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},
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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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"True\n",
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"False\n"
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]
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}
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],
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"source": [
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"#P12: Checking if a number is a factor of another\n",
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"def is_factor(a, b):\n",
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" if b % a == 0:\n",
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" return True\n",
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" else:\n",
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" return False\n",
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"\n",
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"# try it out\n",
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"print(is_factor(4, 1024))\n",
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"print(is_factor(4, 21))"
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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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"collapsed": false
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},
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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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"Your Number Please: 25\n",
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"1\n",
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"5\n",
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"25\n"
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]
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}
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],
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"source": [
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"#P14: Find the factors of an integer\n",
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"'''\n",
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"Find the factors of an integer\n",
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"'''\n",
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"def factors(a):\n",
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" for i in range(1, a+1):\n",
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" if a % i == 0:\n",
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" print(i)\n",
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" \n",
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"if __name__ == '__main__':\n",
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" a = input('Your Number Please: ')\n",
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" a = float(a)\n",
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" if a > 0 and a.is_integer():\n",
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" factors(int(a))\n",
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" else:\n",
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" print('Please enter a positive integer')\n",
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" "
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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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"collapsed": false
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},
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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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"At the grocery store, I bought some apples and bananas and grapes\n"
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]
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}
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],
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"source": [
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"#P15: Format example\n",
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"\n",
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">>> item1 = 'apples'\n",
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">>> item2 = 'bananas'\n",
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">>> item3 = 'grapes'\n",
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">>> print('At the grocery store, I bought some {0} and {1} and {2}'.format(item1, item2, item3))\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": 20,
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"metadata": {
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"collapsed": false
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},
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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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"Enter a number: 5\n",
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"5.0 x 1 = 5.0\n",
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"5.0 x 2 = 10.0\n",
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"5.0 x 3 = 15.0\n",
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"5.0 x 4 = 20.0\n",
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"5.0 x 5 = 25.0\n",
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"5.0 x 6 = 30.0\n",
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"5.0 x 7 = 35.0\n",
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"5.0 x 8 = 40.0\n",
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"5.0 x 9 = 45.0\n",
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"5.0 x 10 = 50.0\n"
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]
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}
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],
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"source": [
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"#P16: Multiplication table printer\n",
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"\n",
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"'''\n",
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"Multiplication table printer\n",
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"'''\n",
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"def multi_table(a):\n",
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" for i in range(1, 11):\n",
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" print('{0} x {1} = {2}'.format(a, i, a*i))\n",
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"\n",
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"if __name__ == '__main__':\n",
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" a = input('Enter a number: ')\n",
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" multi_table(float(a))"
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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": 29,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"37.0"
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]
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},
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"execution_count": 29,
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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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"#P18: Fahrenheit to Celsius conversion\n",
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">>> F = 98.6\n",
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">>> (F - 32) * (5 / 9)\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": 32,
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"metadata": {
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"collapsed": false
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},
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"outputs": [
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{
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"data": {
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"text/plain": [
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"98.60000000000001"
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]
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},
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"execution_count": 32,
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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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"#P18: Celsius to Fahrenheit\n",
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">>> C = 37\n",
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">>> C * (9 / 5) + 32\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": 35,
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"metadata": {
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"collapsed": false
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},
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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. Kilometers to Miles\n",
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"2. Miles to Kilometers\n",
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"Which conversion would you like to do?: 2\n",
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"Enter distance in miles: 100\n",
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"Distance in kilometers: 160.9\n"
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]
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}
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],
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"source": [
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"#P19: Unit conversion\n",
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"\n",
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"'''\n",
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"Unit converter: Miles and Kilometers\n",
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"'''\n",
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"def print_menu():\n",
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" print('1. Kilometers to Miles')\n",
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" print('2. Miles to Kilometers')\n",
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" \n",
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"def km_miles():\n",
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" km = float(input('Enter distance in kilometers: '))\n",
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" miles = km / 1.609\n",
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" print('Distance in miles: {0}'.format(miles))\n",
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"\n",
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"def miles_km():\n",
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" miles = float(input('Enter distance in miles: '))\n",
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" km = miles * 1.609\n",
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" print('Distance in kilometers: {0}'.format(km))\n",
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"\n",
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"if __name__ == '__main__':\n",
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" print_menu()\n",
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" choice = input('Which conversion would you like to do?: ')\n",
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" if choice == '1':\n",
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" km_miles()\n",
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" if choice == '2':\n",
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" miles_km()\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": 38,
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"metadata": {
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"collapsed": false
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},
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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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"-1.0\n",
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"-1.0\n"
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]
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}
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],
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"source": [
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"#P21: Roots of a quadratic equation example\n",
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">>> a = 1\n",
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">>> b = 2\n",
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">>> c = 1\n",
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">>> D = (b**2 - 4*a*c)**0.5\n",
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">>> x_1 = (-b + D)/(2*a)\n",
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">>> print(x_1)\n",
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">>> x_2 = (-b - D)/(2*a)\n",
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">>> print(x_2)\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": 40,
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"metadata": {
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"collapsed": false
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},
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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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"Enter a: 1\n",
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"Enter b: 2\n",
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"Enter c: 1\n",
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"x1: -1.0\n",
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"x2: -1.0\n"
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]
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}
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],
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"source": [
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"#P21: Quadratic Equation Root calculator\n",
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"'''\n",
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"Quadratic Equation root calculator\n",
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"'''\n",
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"def roots(a, b, c):\n",
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" D = (b*b - 4*a*c)**0.5\n",
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" x_1 = (-b + D)/(2*a)\n",
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" x_2 = (-b - D)/(2*a)\n",
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" print('x1: {0}'.format(x_1))\n",
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" print('x2: {0}'.format(x_2))\n",
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"\n",
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"if __name__ == '__main__':\n",
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" a = input('Enter a: ')\n",
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" b = input('Enter b: ')\n",
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" c = input('Enter c: ')\n",
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" roots(float(a), float(b), float(c))\n"
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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": "Python 3",
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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": "3.4.3"
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}
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"nbformat": 4,
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