Michael Yanowitz wrote:
> Hello:
>
> Many times, people are warning things like
> "Don't use 'str' as a variable name as it will shadow the
> built in str function."
> Is there some way to determine if a string is already
> defined in some higher scope?
> Maybe something like
> <code>
>
> if isdefined ('str'):
> print 'str is already defined, please choose another name'
>
>
You might check out globals() which returns a dictionary of everything:
Python 2.2 (#1, Mar 26 2002, 15:46:04)
[GCC 2.95.3 20010315 (SuSE)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__name__':
'__main__', '__doc__': None}
>>> blah = None
>>> globals()
{'__builtins__': <module '__builtin__' (built-in)>, '__name__':
'__main__', '__doc__': None, 'blah': None}
#Taking this a step further, this is a dictionary so you can use the
has_key method or try to access the dict and catch an exception should
the key not exist
>>> if globals().has_key('blah'):
... print "I have blah"
...
I have blah
-carl
--
Carl J. Van Arsdall
[EMAIL PROTECTED]
Build and Release
MontaVista Software
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