Re: Dictionaries
Lad wrote:
> Let's suppose I have
>
> a={'c':1,'d':2}
> b={'c':2}
> but
> a.update(b)
> will make
> {'c': 2, 'd': 2}
>
> and I would need
> {'c': 3, 'd': 2}
>
> (because `c` is 1 in `a` dictionary and `c` is 2 in `b` dictionary, so
> 1+2=3)
>
> How can be done that?
dict([(k, a.get(k, 0) + b.get(k,0)) for k in set(a.keys() + b.keys())])
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Re: Where to find fpconst?
> Anybody know where I can find fpconst? I uploaded the lastest copy I could find to the Cheese Shop (http://www.python.org/pypi/fpconst/). I'm not affiliated in any way with fpconst, btw. Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: ancestor class' __init__ doesn't call other methods
Luis P. Mendes wrote:
> Method a() is not called. Why is this? What is the best option to
> solve this? Have Cotacoes returning values and not to be an ancestor
> class of CruzaEmas?
It works for me, after rearranging your code a little bit:
class Ema:
pass
class Sistema:
def __init__(self, par):
cruza_ema = CruzaEmas(par)
class Cotacoes:
def __init__(self, par):
print "par: ", par
self.a()
def a(self):
print "ff"
class CruzaEmas(Ema, Cotacoes):
def __init__(self, par):
Cotacoes.__init__(self, par)
s = Sistema("par")
--Rob
--
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Compile AST to bytecode?
Hi,
I would like to compile an AST to bytecode, so I can eval it later. I
tried using parse.compileast, but it fails:
>>> import compiler, parser
>>> ast = compiler.parse("42")
>>> parser.compileast(ast)
Traceback (most recent call last):
File "", line 1, in ?
TypeError: compilest() argument 1 must be parser.st, not instance
Any hints?
TIA,
--Rob
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Re: Compile AST to bytecode?
Duncan Booth wrote: > > I would like to compile an AST to bytecode, so I can eval it later. > I'm not sure there are any properly documented functions for converting an > AST to a code object, so your best bet may be to examine what a > pycodegen class like Expression or Module actually does. Thanks, Duncan. It worked perfectly. :-) For arbitrary nodes I just had to wrap them inside an Expression node: >>> ast = compiler.ast.Expression(node) >>> ast.filename = 'dummy' >>> c = compiler.pycodegen.ExpressionCodeGenerator(ast) >>> obj = eval(c.getCode(), scope) --Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: What value should be passed to make a function use the default argument value?
LaundroMat wrote: > Suppose I have this function: > > def f(var=1): > return var*2 > > What value do I have to pass to f() if I want it to evaluate var to 1? > I know that f() will return 2, but what if I absolutely want to pass a > value to f()? "None" doesn't seem to work.. If you *absolutely* want to pass a value and you don't know the default value (otherwise you could just pass it): >>> import inspect >>> v = inspect.getargspec(f)[3][0] # first default value >>> f(v) 2 -- http://mail.python.org/mailman/listinfo/python-list
Re: WSGI with mod_python (was: Python, WSGI, legacy web application)
Ben Finney wrote: > I was under the impression that WSGI in mod_python was a rather kludgy > way to do WSGI, but I don't know what the alternatives are. CGI? > Python http server (e.g. CherryPy)? Something else? You can use FastCGI or SCGI too, with Apache, lighttpd or Cherokee. I have a short description of different ways to run a WSGI app here: http://pydap.org/docs/server.html Though it's focused on a specific WSGI app I wrote it uses Paste Deploy, so you can generalize it easily. --Rob -- http://mail.python.org/mailman/listinfo/python-list
Re: What was that web interaction library called again?
On Jun 22, 11:19 am, Harald Korneliussen <[EMAIL PROTECTED]> wrote: > Hi, > > I remember I came across a python library that made it radically > simple to interact with web sites, connecting to gmail and logging in > with four or five lines, for example. I thought, "that's interesting, > I must look into it sometime". Now there's this child I know who asked > me about programming, especially programs that could do things like > this, how difficult it was, and so on. I mentioned how I though Python > was a good intro to programming, and there was a library which was > perfect for what he wanted. httplib2? -- http://mail.python.org/mailman/listinfo/python-list
Re: Rappresenting infinite
On Jun 27, 6:41 am, andrea <[EMAIL PROTECTED]> wrote: > I would like to have a useful rappresentation of infinite, is there > already something?? from numpy import inf -- http://mail.python.org/mailman/listinfo/python-list
