A piece of code to point out better coding practices

best_practices_example_before.py

import glob, hashlib, csv

# replace with file location
path = r'/mnt/chromeos/MyFiles/Downloads/CSVs/'
files = glob.glob(path + r"/*.csv")
output = r"\output.csv"

# this is where we'll store the values
hits = []

# word we're searching for
firstLetter = 't'
wordLength = 5
wordLength2 = 7

# read the files
for file in files:
    f = open(file, 'r')

    # make a list of all the lines in the file
    lines = []
    for line in f:
        lines.append(line)
    f.close()

    # create a list of words within the file
    wordlist = []
    for line in lines:
        line = line.replace(',', '')
        line = line.replace('\n', '')
        wordlist.append(line.split(" "))

    # join the lines into one list
    joinedlist = []
    for linelist in wordlist:
        joinedlist += linelist

    # search for the term within the joined list and add it to the hits list
    for word in joinedlist:
        if word.lower()[0] == firstLetter.lower():
            if len(word) == wordLength or len(word) == wordLength2:
                hits.append([word, file, hashlib.md5(file.encode('utf-8')).hexdigest()])

# remove duplicates from out hits list
hits = list(set(map(tuple, hits)))

# write the list to a csv file
file = open(path + output, 'w', newline='')
writer = csv.writer(file)
writer.writerows(hits)
file.close()