Print out cases of matching filenames but with different extension

print-twin-filenames.py

#!/usr/bin/env python

# Get all js and jsx files in project and print out the situations
# in which there is a file named *.js beside an identically-named *.jsx file

import subprocess


# Get sorted list of paths of all {js,jsx} files in project, excluding node_modules dir
command = "find -L . \
        -path ./node_modules -prune \
        -o -name '*.jsx' \
        -o -name '*.js' \
        | sort \
        "
out = subprocess.check_output(command, shell=True, text=True)

# Get list of lines from text output
lines = out.split()

# Look for and print out duplicates
duplicate_count = 0
prev_line = ''
for line in lines:
    if line[:-1] == prev_line:
        print(prev_line)
        print(line)
        print()
        duplicate_count += 1
    prev_line = line

print(f'Total files to rename: {duplicate_count}')