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Turns a normal LaTeX environment into an align environment.


This script looks for Markdown files in a specified directory, and converts a normal LaTeX environment:


to an align environment:


Note that you can change 'align' on lines 25 and 28 to another type of environment.


  • This will overwrite the file contents, so make a backup copy of your files before you run it
  • Before you run the script, open it in a text editor (i.e. Notepad) and change line 3 to your target folder
  • This won't touch files in subdirectories. You will have to change line 3 again and re-run the program for any notes in other directories or subdirectories
import os
# MUST SET YOUR DIRECTORY ON THE FOLLOWING LINE - i.e. "C:\\Users\\User1\\Documents"
def getFileNames():
filelist = [] # List of files that we will work on is stored here
files = os.listdir(DIRECTORY) # Contains a list of all files in the directory
for i in files:
# Find all .md files, store names in filelist:
if i.endswith(".md"):
return filelist
def insert(textfiles):
for i in textfiles:
print(f'Opening {i}')
with open(i, "r") as file:
content = file.readlines()
# Read file contents as a list, each line is a new element
print(f'Original content: {content}')
for x in range(0, len(content)):
if content[x] == '$$\n':
content[x] = "$$\\begin{align}\n"
for y in range(x+1, len(content)):
if content[y] == '$$' or content[y] == '$$\n':
content[y] = "\\end{align}$$\n"
x = y
print(f'Updated content: {content}')
print(f'Writing to {i}')
with open(i, "w") as file:
for x in content:
textfiles = getFileNames()
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