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Adding additional ipython notebooks
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‎Applying_Conditional_Functions_To_List_Items.ipynb

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{
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"metadata": {
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"name": "",
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"signature": "sha256:db89df05ffb3b02ecb6fb06d9e0c3c08bf775b72df717fc58718a4ccfe4f5409"
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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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"# Applying Conditional Functions To List Items\n",
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"\n",
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"This snippit was written by [Chris R. Albon](http://www.chrisralbon.com/) and is part of his collection of [well-documented Python snippits](https://github.com/chrisalbon/code_py). All code is written in Python 3 in iPython notebook and offered under the [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/)."
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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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"### Create a list of regiment names"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"regimentNames = ['Night Riflemen', 'Jungle Scouts', 'The Dragoons', 'Midnight Revengence', 'Wily Warriors']"
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": 5
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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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"## Using A Conditional For Loop"
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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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"### Create a for loop goes through the list and capitalizes an item if the first letter starts with N"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"# create a variable for the loop results\n",
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"regimentNamesCapitalized_f = []\n",
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"\n",
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"# for every item in regimentNames\n",
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"for i in regimentNames:\n",
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" # if the first letter of the regiment's name is N\n",
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" if i[0] == \"N\":\n",
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" # capitalize the item and add it to regimentNamesCapitalized_f\n",
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" regimentNamesCapitalized_f.append(i.upper())\n",
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" # otherwise, add it to the new list without changing anything\n",
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" else:\n",
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" regimentNamesCapitalized_f.append(i)\n",
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" \n",
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"# View the outcome\n",
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"regimentNamesCapitalized_f"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"metadata": {},
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"output_type": "pyout",
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"prompt_number": 9,
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"text": [
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"['NIGHT RIFLEMEN',\n",
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" 'Jungle Scouts',\n",
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" 'The Dragoons',\n",
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" 'Midnight Revengence',\n",
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" 'Wily Warriors']"
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]
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}
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],
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"prompt_number": 9
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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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"## Using List Comprehension With Conditionals"
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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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"### Apply the expression x.upper to each item in the list called regiment names if it matches a condition, else apply a different function (or, in this case, do nothing)"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"regimentNamesCapitalized_l =[x.upper() if x[0] == \"N\" else x for x in regimentNames]; regimentNamesCapitalized_l"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"metadata": {},
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"output_type": "pyout",
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"prompt_number": 24,
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"text": [
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"['NIGHT RIFLEMEN',\n",
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" 'Jungle Scouts',\n",
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" 'The Dragoons',\n",
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" 'Midnight Revengence',\n",
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" 'Wily Warriors']"
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]
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}
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],
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"prompt_number": 24
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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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"Note that the syntax for conditional list comprehension is **[x if y else z for k in v]**\n",
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"\n",
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"- x = function if conditional statement is true\n",
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"- y = conditional statement\n",
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"- z = function if conditional statement is not true\n",
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"- k = items in list\n",
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"- v = list variable"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [],
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"language": "python",
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"metadata": {},
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"outputs": []
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}
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],
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"metadata": {}
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}
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]
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}

‎Applying_Functions_To_List_Items.ipynb

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{
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"metadata": {
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"name": "",
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"signature": "sha256:47e7e56050a2cbd121f24f123c0c64e5a01a2f75bf3bea63f73798cb9d7e921c"
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},
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"nbformat": 3,
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"nbformat_minor": 0,
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"worksheets": [
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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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"# Applying Functions To List Items\n",
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"\n",
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"This snippit was written by [Chris R. Albon](http://www.chrisralbon.com/) and is part of his collection of [well-documented Python snippits](https://github.com/chrisalbon/code_py). All code is written in Python 3 in iPython notebook and offered under the [Creative Commons Attribution-ShareAlike 4.0 International License](http://creativecommons.org/licenses/by-sa/4.0/)."
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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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"### Create a list of regiment names"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"regimentNames = ['Night Riflemen', 'Jungle Scouts', 'The Dragoons', 'Midnight Revengence', 'Wily Warriors']"
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": 23
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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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"## Using A For Loop"
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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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"### Create a for loop goes through the list and capitalizes each"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"# create a variable for the for loop results\n",
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"regimentNamesCapitalized_f = []\n",
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"\n",
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"# for every item in regimentNames\n",
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"for i in regimentNames:\n",
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" # capitalize the item and add it to regimentNamesCapitalized_f\n",
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" regimentNamesCapitalized_f.append(i.upper())\n",
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" \n",
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"# View the outcome\n",
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"regimentNamesCapitalized_f"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"metadata": {},
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"output_type": "pyout",
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"prompt_number": 26,
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"text": [
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"['NIGHT RIFLEMEN',\n",
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" 'JUNGLE SCOUTS',\n",
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" 'THE DRAGOONS',\n",
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" 'MIDNIGHT REVENGENCE',\n",
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" 'WILY WARRIORS']"
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]
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}
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],
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"prompt_number": 26
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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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"## Using Map()"
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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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"### Create a lambda function that capitalizes x"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"capitalizer = lambda x: x.upper()"
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],
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"language": "python",
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"metadata": {},
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"outputs": [],
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"prompt_number": 25
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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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"### Map the capitalizer function to regimentNames, convert the map into a list, and view the variable"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"regimentNamesCapitalized_m = list(map(capitalizer, regimentNames)); regimentNamesCapitalized_m"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"metadata": {},
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"output_type": "pyout",
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"prompt_number": 18,
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"text": [
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"['NIGHT RIFLEMEN',\n",
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" 'JUNGLE SCOUTS',\n",
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" 'THE DRAGOONS',\n",
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" 'MIDNIGHT REVENGENCE',\n",
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" 'WILY WARRIORS']"
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]
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}
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],
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"prompt_number": 18
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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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"## Using List Comprehension"
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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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"### Apply the expression x.upper to each item in the list called regiment names. Then view the output"
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]
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},
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{
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"cell_type": "code",
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"collapsed": false,
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"input": [
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"regimentNamesCapitalized_l = [x.upper() for x in regimentNames]; regimentNamesCapitalized_l"
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],
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"language": "python",
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"metadata": {},
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"outputs": [
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{
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"metadata": {},
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"output_type": "pyout",
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"prompt_number": 22,
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"text": [
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"['NIGHT RIFLEMEN',\n",
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" 'JUNGLE SCOUTS',\n",
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" 'THE DRAGOONS',\n",
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" 'MIDNIGHT REVENGENCE',\n",
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" 'WILY WARRIORS']"
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]
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}
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],
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"prompt_number": 22
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}
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],
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"metadata": {}
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}
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]
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}

‎README.md

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Some well commented code snippits in (mostly) Python 3
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This collection of snippits is not comprehensive, and is in many places repetative.
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You can view all the snippits in [iPython Notebook Viewer](http://nbviewer.ipython.org/github/chrisalbon/code_py/tree/master/).

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