Re: writing Python in Emacs

[alitosis]

Rob Wolfe wrote:
> The good news is that I managed to configure completion for Python
> in Emacs using pymacs, python-mode.el, pycomplete.el and pycomplete.py.
> For contents of my pycomplete.el, pycomplete.py and necessary
> settings in .emacs see below.

Thanks for that!  I've been hoping something like this landed on my
lap for years.

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Re: exec and closures

[alitosis]

On Feb 22, 3:18 am, Peter Otten <[EMAIL PROTECTED]> wrote:
> Alejandro Dubrovsky wrote:
> > def autoassign(_init_):
> > import inspect
> > import functools
>
> > argnames, _, _, defaults = inspect.getargspec(_init_)
> > argnames = argnames[1:]
>
> > indentation = ''
> > settings = ['self.%s = %s' % (arg[1:], arg) for arg in argnames
> > if arg[0] == '_']
>
> > if len(settings) <= 0:
> > return _init_
>
> > if defaults is None:
> > args = argnames[:]
> > else:
> > args = argnames[:-len(defaults)]
> > for key, value in zip(argnames[-len(defaults):],defaults):
> > args.append('%s=%s' % (key, repr(value)))
>
> > template = """def _autoassign(self, %(args)s):
> > %(setting)s
> > _init_(self, %(argnames)s)
> > """ % {'args' : ", ".join(args), 'setting' : "\n".join(['%s%s' %
> > (indentation, setting) for setting
> > in settings]), 'argnames' : ', '.join(argnames)}
>
> > try:
> > exec template
> > except SyntaxError, e:
> > raise SyntaxError('%s. line: %s. offset %s:\n%s' %
> > (e.msg, e.lineno, e.offset, template))
> > return _autoassign
>
>
[snip]
> > Is there a way to bind the _init_ name at exec time?
>
> Use a dedicated namespace:
>
> namespace = dict(_init_=_init_)
> exec template in namespace
> return namespace["_autoassign"]
>
> Peter

That works!  Excellent, thanks.
I still don't understand why the original doesn't work.  I thought
exec with no namespace specified used the current context, in which
_init_ would be _init_ already.  But understanding can wait.
ale

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Re: Problem with exec

[alitosis]

On Mar 14, 9:47 am, Justus Schwabedal <[EMAIL PROTECTED]>
wrote:
[snipped]
> However when I do this:
>
> bash-3.2$ cat execBug2.py
> #! /usr/bin/python
> header="""
> from scipy import randn
> def f():
>  return randn()
> """
> def g():
>  exec header
>  return f()
> print "g() =",g()
> bash-3.2$ ./execBug2.py
> g() =
> Traceback (most recent call last):
>File "./execBug2.py", line 10, in 
>  print "g() =",g()
>File "./execBug2.py", line 9, in g
>  return f()
>File "", line 4, in f
> NameError: global name 'randn' is not defined
> bash-3.2$ ???
>
> I get this global name error. I can fix it with adding some line like
> "global randn" but I don't want to do this. I want to do exactly what  I 
> wrote: Import the function scipy.randn in the local namespace of the
>
> function "g" so that "return f()" makes sense. Can anybody help me out?
> Yours Justus

Maybe using an explicit namespace is good enough for your needs:

#! /usr/bin/python
header="""
from scipy import randn
def f():
 return randn()
"""
def g():
 n = {}
 exec header in n
 return n['f']()
print "g() =",g()


(i don't understand the issues, but I can cut-and-paste with the best
of them)
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