Contradictory error messages in Python 3.4 - standard library issue!

[Harrison Chudleigh]

While working on a program, I ran into an error with the usage of the
module tokenize. The following message was displayed.
 File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/tokenize.py",
line 467, in tokenize
    encoding, consumed = detect_encoding(readline)
  File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/tokenize.py",
line 409, in detect_encoding
    if first.startswith(BOM_UTF8):
TypeError: startswith first arg must be str or a tuple of str, not bytes
Undaunted, I changed the error on line 409. The line then read:

if first.startswith(BOM_UTF8):
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