python scripts

delimiter-changer.py

"""
change `$` delimiter to `\(` and `\)` pair, at mathjax
"""

import itertools
delimiters = iter(itertools.cycle(["\(", "\)"]))

# from https://math.stackexchange.com/questions/3307627
original = r"""The point is that all rational numbers can be expressed in lowest terms. They don't have to be. Yes, $\frac 24$ is a perfectly good rational number, but the same number can be expressed as $\frac 12$. When we prove $\sqrt 2$ is irrational, we assume it is rational, then say to express that rational in lowest terms as $\frac ab$.  The reason to do that is that we then show both $a$ and $b$ are even, so $\frac ab$ is not in lowest terms.  If we had not assumed it was in lowest terms we would not have the contradiction we are seeking."""
new = ""

for char in original:
    if char == "$":
        new += next(delimiters)
    else:
        new += char
            
print(new)