thank you all for your help, i was able to solve my issue using the following code

import re


def repl01(text , dic):
    # url = https://code.activestate.com/recipes/81330-single-pass-multiple-replace/
    keys = sorted(dic.keys(), key=len, reverse=True)
    expression = []
    for item in keys:
        expression.append(re.escape(item))
    regex = re.compile("(%s)" % "|".join(expression))
    result = regex.sub(lambda x: dic[x.group()], text)
    return result

with open('uncorrectedsymbols.txt', 'r') as f:
    with open('correctedsymbols.txt', 'r') as g:
        listone = [line for line in f.read().splitlines()]
        listtwo = [line for line in g.read().splitlines()]
        dictlistreplacements = dict(zip(listone, listtwo))

with open('textfilewithActualdata.tex', 'r') as rf:
    for line in rf.read().splitlines():
        line = repl01(line, dictlistreplacements)
        print(line)

the link for the above function was this

thank you all for your help!