Changing Case with Exception Specifically in between dollar signs

Question

Input:

MECR-tree obtained using \textbf{MCAR-Miner} with $S_{\mathrm{U}}  = data$ 25{\%} and $S_{\mathrm{L}}  = string$ 12.5{\%}

Change it to Title Case but exempt the text within the $ signs.

Output should be:

Mecr-Tree Obtained Using \textbf{Mcar-Miner} With $S_{\mathrm{U}}  = data$ 25{\%} And $S_{\mathrm{L}}  = string$ 12.5{\%}

Answer 1

Here's an example that assumes that the $ character will always occur in pairs:

sp = s.split('$')
for i, seg in enumerate(sp):
    if i % 2 == 0:
        sp[i] = seg.title()

print('$'.join(sp))

Using a list comprehension:

print(r'$'.join([seg.title() if not i % 2 else seg for i, seg in enumerate(s.split('$'))]))