Replace literal strings in files via Python

replacer.py

"""
Replace tool
Source: https://superuser.com/questions/422459/substitution-in-text-file-without-regular-expressions
"""
import re
import sys

search_term = sys.argv[1]
replace_term = sys.argv[2]
target_file = sys.argv[3]
insensitive = sys.argv[4]

with open(target_file, "r") as file:
    content = file.read()

if insensitive == "True":
    print(f"Ignore case: Replacing {search_term} with {replace_term} in {target_file}...")
    insensitive_search = re.compile(re.escape(f"{search_term}"), re.IGNORECASE)
    insensitive_search.sub(f"{replace_term}", content)
else:
    print(f"Case sensitive: Replacing {search_term} with {replace_term} in {target_file}...")
    content = content.replace(sys.argv[1], sys.argv[2])

with open(target_file, "w") as file:
    file.write(content)

Example usage:

for PAGE in $($EDIT_PAGES)
do
    python replace.py 'original_string' 'new_string' $PAGE True
done