Issue 3524: IOError when attempting negative seek in file (Python 3.0 tutorial) (original) (raw)

The Input and Output section of the Python 3.0 tutorial (http://docs.python.org/dev/3.0/tutorial/inputoutput.html) shows an example of seeking in a negative direction from the end of a file. I get an IOError when attempting to run the example in Python 3.0b2 on Mac OS X 10.4 (PPC). I don't know whether the tutorial or the code should be changed.

f = open('workfile', 'r+') f.write('0123456789abcdef') 16 f.seek(-3, 2) Traceback (most recent call last): File "", line 1, in File "/Users/jimsize/Programming/Python/py3k/3.0b2/lib/python3.0/io.py", line 1609, in seek raise IOError("can't do nonzero end-relative seeks") IOError: can't do nonzero end-relative seeks