There is a design question. If you read file in some format or with some
protocol, and the data is ended unexpectedly, when to use general
EOFError exception and when to use format/protocol specific exception?
For example when load truncated pickle data, an unpickler can raise
EOFError, UnpicklingError, ValueError or AttributeError. It is possible
to avoid ValueError or AttributeError, but what exception should be
raised instead, EOFError or UnpicklingError? Maybe convert all EOFError
to UnpicklingError? Or all UnpicklingError caused by unexpectedly ended
input to EOFError? Or raise EOFError if the input is ended after
completed opcode, and UnpicklingError if it contains truncated opcode?
http://bugs.python.org/issue25761
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