gistfile1.txt

import re
d2 = 0
cumul_raw = 0

with open('instru.txt', 'r') as f:

    for line in f:
        line=line.rstrip()
        d2+=4

        cumul_raw+=len(line)
        print line

        for i in range(1,len(line)-1):
            print d2
            if line[i] == "\\" :
                if line[i+1] == "\"" and (not line[-2]=='\\'):
                    d2+=2
                elif line[i+1] == '\\' and (not line[i-1] == '\\'):
                    d2+=2
                elif line[i+1] == "x":
                    if re.findall(r'[a-f0-9]{2}',line[i+2:i+4]):
                        d2+=1
print d2