Re - Contradictory error messages in Python 3.4 - standard library issue!

[Harrison Chudleigh]

Sorry! I was trying to indent a line and accidentally sent only half of the
message.

As I was saying, I changed the line and reran the program. However, this
produced another group of error messages. One was -
File
"/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/tokenize.py",
line 438, in open
    encoding, lines = detect_encoding(buffer.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 bytes or a tuple of bytes, not str.
So, first the interpreter says startswith() takes strings, now it says it
takes bytes? What should the module be doing?
This is an error with the standard library of Python 3.4.1, Mac OS X.
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