sem7_1

import string


def strings(filename, min_str_len=4):
    min_len = max(min_str_len, 0)
    current_line = ''
    good = bytes(string.printable, 'ascii')
    with open(filename, "rb") as file:
        while True:
            line = file.read(512)
            if not line:
                break
            for byte in line:
                if byte in good:
                    current_line += chr(byte)
                else:
                    if(len(current_line) > min_len):
                        yield current_line
                    current_line = ''
            if (len(current_line) > min_len):
                yield current_line
            current_line = ''
    if (len(current_line) > min_len):
        yield current_line
    current_line = ''