On Sat, Mar 14, 2015 at 1:33 PM, Paul Rubin <no.email@nospam.invalid> wrote:
> emile <em...@fenx.com> writes:
>> *** NameError: name 'val' is not defined
>> (Pdb) l
>> 139 try:
>> 140 val = round(float(decval),1)
>> 141 except:
>> 142 import pdb; pdb.set_trace()
>
> If 'float' or 'round' throw an exception, the assignment to 'val' never
> happens, so 'val' is undefined. Try examining the value of 'decval' in
> the debugger to see what is making the conversion fail.
That's exactly what the OP did :) Trouble is, it didn't help, because
it sure looked as if decval was the string '4'. My best guess was -
and is - that it's not just a string. We're looking at an SQL
interface routine here, so it may be that there's a string subclass
that length-limits itself, on the assumption that it's going into a
fixed-length database field. Let's see if I can recreate the OP's
situation...
>>> def Char(maxlen):
class CharN(str):
def __repr__(self):
return repr(self[:maxlen])
CharN.__qualname__ = CharN.__name__ = "Char(%d)"%maxlen
return CharN
>>> four = Char(1)('41.700000000000003')
>>> four
'4'
>>> int(four)
Traceback (most recent call last):
File "<pyshell#28>", line 1, in <module>
int(four)
ValueError: invalid literal for int() with base 10: '4'
... well, close. Anyway, a string subclass could probably do this by
accident somehow.
ChrisA
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