import os
for root, dirs, files in os.walk("."):
    if "test" in root: continue # Tests are generally legitimate and uninteresting.
    for fn in files:
        fn = os.path.join(root,fn)
        if not fn.endswith(".py"): continue
        with open(fn,"rb") as f:
            for l,line in enumerate(f,1):
                try:
                    line.decode("ascii")
                    continue # Ignore the ASCII lines
                except UnicodeDecodeError:
                    line = line.rstrip(b"\n")
                    try: line = line.decode("UTF-8")
                    except UnicodeDecodeError: line = repr(line) # If it's not UTF-8 either, show it as b'...'
                    print("%s:%d: %s" % (fn,l,line))