On Monday, July 28, 2014 11:28:40 AM UTC-4, Steven D'Aprano wrote:
> On Mon, 28 Jul 2014 03:39:48 -0700, Bruce Whealton wrote:
Stephen,
I went to my Ubuntu box inside vmware and added a #!/usr/bin/env python2.7
to the top. Then I made the file executable and it ran the code perfectly.
>
> First step is to confirm that Eclipse actually is using Python 2.7. Can
>
> you get it to run this code instead? Put this in a module, and then run
>
> it:
>
>
>
> import sys
>
> print(sys.version)
>
>
I had both python2.7 and python3.4. I could be less specific with my shebang
line but what the heck.
>
>
>
I then installed pydev into my eclipse environment within the Ubuntu virtual
machine and it ran the program just fine. So, I suspect the extra character
was
only an issue on Windows. I thought I had it setup to show even hidden
characters.
Anyway, thanks so much for all the help...everyone. It might be interesting
for me to convert this to a module that runs with python 3.
Bruce
>
>
> > It just
>
> > says invalid syntax and points at the parentheses that are in the
>
> > function definition def add(self, (subj, pred, obj)):
>
> > So, from what you said, and others, it seems like this should have
>
> > worked but eclipse would not run it. I could try to load it into IDLE.
>
>
>
> Whenever you have trouble with one IDE, it's good to get a second opinion
>
> in another IDE. They might both be buggy, but they're unlikely to both
>
> have the same bug.
>
>
>
> Also, try to run the file directly from the shell, without an IDE. from
>
> the system shell (cmd.exe if using Windows, bash or equivalent for
>
> Linux), run:
>
>
>
> python27 /path/to/yourfile.py
>
>
>
> You'll obviously need to adjust the pathname, possibly even give the full
>
> path to the Python executable.
>
>
>
>
>
> [...]
>
> >> In Python 3, that functionality was dropped and is no longer allowed.
>
> >> Now you have to use the longer form.
>
> >>
>
> > I'm not sure I follow what the longer method is. Can you explain that
>
> > more, please.
>
>
>
> I referred to the parenthesised parameter version as a short cut for a
>
> method that takes a single argument, then manually expands that argument
>
> into three items. Let me show them together to make it more obvious:
>
>
>
> # Unparenthesised version, with manual step.
>
> def add(self, sub_pred_obj):
>
> sub, pred, obj = sub_pred_obj
>
> do_stuff_with(sub or pred or obj)
>
>
>
> # Parenthesised shortcut.
>
> def add(self, (sub, pred, obj)):
>
> do_stuff_with(sub or pred or obj)
>
>
>
> Both methods take a single argument, which must be a sequence of exactly
>
> three values. The second version saves a single line, hence the first
>
> version is longer :-)
>
>
>
>
>
> --
>
> Steven
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