cs50 dna

import csv
import sys
import random
import re

# Ensure correct argv line

if len(sys.argv)!= 3:
    print("Error !")
    sys.exit(1)

with open(sys.argv[1]) as file:
    reader = csv.DictReader(file)
    sequences = next(reader)

with open (sys.argv[2]) as dnafile:
    dna = csv.reader(dnafile)
    for row in dnafile:
        dnalist = row

DNA = dnalist[0]
dict_seq = {}


search_re = re.compile('(?:' + STR + ')+')
print(max((len(seq) for seq in search_re.findall(dna)), default=0) // len(STR))


with open(sys.argv[1]) as file:
    reader = csv.DictReader(file)
    for row in reader:
        match = 0
        for DNA in dict_seq:
            if dict_seq[DNA] == int(row[DNA]):
                match += 1
        if match == len(dict_seq):
            print(row['name'])
            exit()
    #otherwise, no match
    print("No match")