Checking the boolean value of a collection
Fredrik Lundh
fredrik at pythonware.com
Fri Sep 12 11:11:47 EDT 2008
Marco Bizzarri wrote:
> I would like to make this available to the whole project. I suspect I
> could put it in the package __init__.py... in that way, the
> __builtins__ namespace should have it... am I right?
the __init__ module for package "foo" defines the contents of the "foo"
module; it doesn't add anything to the builtin namespace.
Diez made a typo in his post, btw. To add your own builtins, you should
add them to the "__builtin__" module (no plural s):
import __builtin__
try:
any
except NameError:
def any(iterable):
for element in iterable:
if element:
return True
return False
__builtin__.any = any
try:
all
except NameError:
def all(iterable):
for element in iterable:
if not element:
return False
return True
__builtin__.all = all
The "__builtins__" object is an implementation detail, and shouldn't be
accessed directly. And I hope I don't need to point out that adding
custom builtins nillywilly is a bad idea...
</F>
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