jskherman

import re

text = "Dummy text here with the cards"

# Regex for Basic Card with Extra field using #flashcard
basic_regex = r"((?:[^\n][\n]?)+) #flashcard ?\n*((?:\n(?:^.{1,3}$|^.{4}(?<!<!--)(?<!Extra: ).*)))(?:\nExtra: (.*))+"

# Regex for Cloze Card with Extra field
cloze_extra = r"((?:.+\n)*(?:.*==.*)(?:\n(?:^.{1,6}$|^.{7}(?<!<!--ID:)(?<!Extra: ).*))*)(?:\nExtra: (.*))?"

jskherman

import re

text = "[hello:: world]\n[key:: value]\n[testing::1]\n[listing::1,2,3]"

# Caveat: These regex only work with one field on a line
#         and cannot have two or more in the same line.
key_regex = r"(?!\[).*(?:(?=\:\:))"
value_regex = r"(?:(?<=\:\:)(.*)(?=\]))"

# Save values to a list

jskherman

def round_up(n, decimals=0):
    # Move significant decimal digits to the left of the decimal point
    multiplier = 10 ** decimals

    # Truncate the unneeded digits on the right of the decimal point
    sig_digits = n * multiplier // 1

    # Determine whether to round up or round down
    # Return 1 if the tenth digit is greater than or equal to 5,
    # else return 0 if less than 5

jskherman

π to 3200 digits in the Library of Babel

The Key

The decoding key is as follows:

Character	Digit
a	0
b	1

jskherman

# Script to parse the csv from the Forest App into a pandas dataframe

#%%
import pandas as pd
from datetime import datetime

### Specify pattern for dates in Forest's csv export for dateparser
dateparse = lambda x: datetime.strptime(x, "%a %b %d %H:%M:%S %Z%z %Y")

### Sidenote: Alternative regex patterns

jskherman

<!------------------- SITE HEADER -------------------->
<!-- KaTeX for math, Use \( \) and \[ \] -->
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/katex.css" crossorigin="anonymous">
<script defer src="https://cdn.jsdelivr.net/npm/[email protected]/dist/katex.js" crossorigin="anonymous"></script>
<script defer src="https://cdn.jsdelivr.net/npm/[email protected]/dist/contrib/auto-render.min.js" crossorigin="anonymous" onload="renderMathInElement(document.body);"></script>

<!-- Prism.js for code syntax highlighting (header) -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.26.0/themes/prism-tomorrow.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.26.0/plugins/toolbar/prism-toolbar.min.css" />
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/prism/1.26.0/plugins/line-numbers/prism-line-numbers.min.css" />

jskherman

# Used in Deepnote
!pip install selenium
!apt-get update
!apt install -y chromium
!wget https://chromedriver.storage.googleapis.com/2.41/chromedriver_linux64.zip
!unzip chromedriver_linux64.zip
!chmod +x chromedriver

jskherman

The Command

A command for using ffmpeg to rotate a video:

ffmpeg -i /path/to/input/video.mp4 -vf 'transpose=2' -c:v libx264 -c:a copy -crf 20 /path/to/output/video.mp4

• transpose=2 means to rotate the video counterclockwise
• transpose=1 means to rotate the video clockwise