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fix: regex demo in lesson 7 #25

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finstermeier merged 1 commit into from
Apr 29, 2026
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fix: regex demo in lesson 7 #25

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33 changes: 22 additions & 11 deletions lessons/lesson_07.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -272,16 +272,27 @@
"source": [
"import re\n",
"\n",
"# # reading file\n",
"# with open(\"../data/towels.txt\", \"r\") as infile:\n",
"# story = infile.read()\n",
"# This text comes from the book \"20,000 Leagues Under the Sea\" by Jules Verne, published in 1870.\n",
"\n",
"# # create pattern\n",
"# pattern = \".*[H|h]itch *[H|h]iker.*\"\n",
"# regex = re.compile(pattern)\n",
"story = \"\"\"On the 6th of November, 1867, the frigate Abraham Lincoln departed at 3:00 PM from Brooklyn pier.\n",
"The crew numbered 307 men and officers.\n",
"Captain Farragut had placed a reward of $2,000 for whoever first sighted the creature.\n",
"Professor Aronnax, a marine biologist from Paris, stood at the bow scanning the horizon.\n",
"The animal, if it exists, must be of considerable size — perhaps 200 feet in length.\n",
"The sea was calm; visibility extended roughly 15 nautical miles.\n",
"At latitude 31° 15' N, longitude 136° 42' E, they found nothing.\n",
"After 3 weeks with no sightings, the crew grew restless.\n",
"Then, on November 28th at 11:17 PM, the lookout cried: Object sighted — bearing 315 degrees!\n",
"The creature emitted a pale phosphorescent light and moved at approximately 40 knots.\n",
"Aronnax estimated its mass at no less than 1,500 tons.\n",
"Impossible, said Conseil quietly, and yet — there it is.\"\"\"\n",
"\n",
"# # search for pattern and print each line with the pattern in it\n",
"# print(regex.findall(story))"
"# create pattern\n",
"pattern = \".*\\d{1,2}:\\d{2} PM.*\"\n",
"regex = re.compile(pattern)\n",
"\n",
"# search for pattern and print each line with the pattern in it\n",
"print(regex.findall(story))"
]
},
{
Expand All @@ -292,7 +303,7 @@
"- certain strings have specific meanings:\n",
" - `.*` = any number of any character before/after our pattern except `\\n`, including 0 observations\n",
" - `*` = any number of any character within our pattern, including 0 observations\n",
" - `[H|h]` = one character, eiter an `H` or an `h`\n",
" - `\\d{1,2}` = one or two digits\n",
"- when compiling the search pattern, you can include certain flags\n",
" - `re.IGNORECASE` to have case insensitive matching\n",
" - `re.DOTALL` to have the `.` match all characters incl. the line end character `\\n`\n",
Expand Down Expand Up @@ -1359,7 +1370,7 @@
"metadata": {
"celltoolbar": "Slideshow",
"kernelspec": {
"display_name": "default",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -1373,7 +1384,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.14.4"
"version": "3.11.0"
}
},
"nbformat": 4,
Expand Down