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merged 3 commits into from
Sep 19, 2014
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Suggested improvements for part 4 #32

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d17d722
Improve wording in list comprehensions example
treyhunner Sep 15, 2014
5d1d6b3
Use a for loop in dictionary example
treyhunner Sep 15, 2014
319d914
Make more concrete exercise suggestions for part 4
treyhunner Sep 15, 2014
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18 changes: 13 additions & 5 deletions part-4.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -110,14 +110,14 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"Note how our list comprehension is written within the brackets: The for-loop statement is written at the end whereas the action inside of the for-loop is written first: n * n"
"Note how our list comprehension is written within the brackets: The list we're looping over (my_favorite_numbers) is written at the end whereas the action inside of the for-loop is written first: n * n"
]
},
{
"cell_type": "markdown",
"metadata": {},
"source": [
"Let's revisit a problem we've already solved in Danny's lecture on list:\n",
"Let's revisit a problem we've already solved in Danny's lecture on lists:\n",
"\n",
"Pick every name from a list that begins with a vowel.\n",
"\n",
Expand Down Expand Up @@ -286,14 +286,16 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"Let's translate each word and save them in the list called translated_words. We'll generate this list by using a list comprehension."
"Let's translate each word and save them in the list called translated_words. Let's start with an empty list and use a for loop to populate our list:"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"translated_words = [print(words[spanish_word]) for spanish_word in sentence_words]"
"translated_words = []\n",
"for spanish_word in sentence_words:\n",
" translated_words.append(words[spanish_word])"
],
"language": "python",
"metadata": {},
Expand Down Expand Up @@ -415,7 +417,13 @@
"cell_type": "markdown",
"metadata": {},
"source": [
"**Extra Credit:** Try using a list comprehension in the translate function.\n",
"**Exercises:**\n",
"\n",
"1. Make a new py file and put that translate function in the file. Use the print function to print out some examples of using the function.\n",
"\n",
"2. Refactor the translate function to use a list comprehension.\n",
"\n",
"3. There are lots of ways to write that translate function. Just for fun, see if you can write the whole translate function in one line.\n",
"\n",
"**Note:** Typing out the exercises for the next section, \"Sets\", is optional. If your brain is melting, feel free to sit back, relax, and enjoy the rest of the lecture."
]
Expand Down