19 for line in sys.stdin:

    19 for line in sys.stdin:

    20     # We whitelist tests

    20     # We whitelist tests

    21     pats = [

    21     pats = [

    22             r"imported but unused",

    22             r"imported but unused",

    23             r"local variable '.*' is assigned to but never used",

    23             r"local variable '.*' is assigned to but never used",

    24            ]

    25            ]

    25     if not re.search('|'.join(pats), line):

    26     if not re.search('|'.join(pats), line):

    26         continue

    27         continue

    27     lines.append(line)

    28     lines.append(line)

    28 

    29