Is this a legal / acceptable statement ?

Larry Bates larry.bates at websafe.com
Fri May 5 16:25:57 CEST 2006


Philippe Martin wrote:
> Hi,
> 
> This code works, but is it "appropriate" ?
> 
> l_init = False
> 
> if True == l_init and 1234 = l_value:
>  print 'l_value is initialized'
> 
> I know I can do this with a try but ...
> 
> Philippe
> 
> 
1) You have a syntax error 1234 == l_value (note ==)
2) This doesn't test to see if l_value is initialized
   because if it isn't you get:

Traceback (most recent call last):
  File "C:\Python24\Lib\site-packages\pythonwin\pywin\framework\scriptutils.py",
line 310, in RunScript
    exec codeObject in __main__.__dict__
  File "junk.py", line 1, in ?
    if True == l_init and 1234 == l_value:
NameError: name 'l_init' is not defined

3) It is unclear what l_init is used for in this context.
   Setting it to True doesn't tell you anything about l_value.

Normally you do something like:

l_value=None
.
. Intervening code
.
if l_value is None:
    print "l_value uninitialized"

Or (something I never use):

if not locals().has_key('l_value'):
    print "l_value uninitialized"


-Larry Bates



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