On Sun, Jun 26, 2011 at 4:28 PM, rzed <rzan...@gmail.com> wrote: > steve+comp.lang.pyt...@pearwood.info wrote in > news:4e074768$0$29982$c3e8da3$54964...@news.astraweb.com: > >> rzed wrote: >> >>> I've tried to install PySVG in a Python 3 setting, and I get a >>> few errors on the build. Most are easy to fix, but this one I >>> can't explain or fix: >>> >>> <error> >>> Traceback (most recent call last): >>> File "<stdin>", line 1, in <module> >>> File "builders.py", line 12, in <module> >>> from pysvg.shape import * >>> File "C:\Python32\lib\site-packages\pysvg\shape.py", line 91 >>> def moveToPoint(self,(x,y)): >>> ^ >>> SyntaxError: invalid syntax >>> </error> >> >> Function signatures with automatic tuple-unpacking are no longer >> allowed in Python3. So functions or methods like this: >> >> def moveToPoint(self,(x,y)): >> >> have to be re-written with the tuple unpacking moved into the >> body of the function, e.g. something like this: >> >> def moveToPoint(self, x_y): >> x, y = x_y >> >> >> Are you aware that you're trying to install a Python2 library >> under Python3? >> >> > > Thank you all for your responses. Yes, I am aware of the version > difference, but not of all the implications of that. I will run this > through 2to3, but even without doing that, there are only about four > syntax errors, and the others were obvious and easily corrected. > > There does not seem to be a Py3 version of this package. I was hoping > to try it to see what broke. Well, I found out at least part of that, > didn't I? > > I was not aware of the removal of tuple-unpacking. I expect there was > some extensive conversation about that. > > As to 2to3, I have to say that: > > -def a(b, (c,d)): > +def a(b, xxx_todo_changeme): > + (c,d) = xxx_todo_changeme > > ... is not terribly revealing if one is unaware of what about it > needs changing. I know, I know: RTFM....
It means delete every line with a '-' and replace them with those next to the '+' Of course, if you read the doc, it'll give you lots of different options, including writing to the file, so all you need to do is change the variable names. -- http://mail.python.org/mailman/listinfo/python-list
