Tim Arnold <a_j...@bellsouth.net> writes:
> Hi,
> I have a set of strings that are *basically* comma separated, but with
> the exception that if a comma occur insides curly braces it is not a
> delimiter. Here's an example:
>
> [code=one, caption={My Analysis for \textbf{t}, Version 1}, continued]
>
> I'd like to parse that into a dictionary (note that 'continued' gets
> the value 'true'):
> {'code':'one', 'caption':'{My Analysis for \textbf{t}, Version
> 1}','continued':'true'}
>
> I know and love pyparsing, but for this particular code I need to rely
> only on the standard library (I'm running 2.7). Here's what I've got,
> and it works. I wonder if there's a simpler way?
> thanks,
> --Tim Arnold
>
FWIW, here's how I would do it:
def parse_key(s, start):
pos = start
while s[pos] not in ",=]":
pos += 1
return s[start:pos].strip(), pos
def parse_value(s, start):
pos, nesting = start, 0
while nesting or s[pos] not in ",]":
nesting += {"{":1, "}":-1}.get(s[pos], 0)
pos += 1
return s[start:pos].strip(), pos
def parse_options(s):
options, pos = {}, 0
while s[pos] != "]":
key, pos = parse_key(s, pos + 1)
if s[pos] == "=":
value, pos = parse_value(s, pos + 1)
else:
value = 'true'
options[key] = value
return options
test = "[code=one, caption={My Analysis for \textbf{t}, Version 1}, continued]"
>>> parse_options(test)
{'caption': '{My Analysis for \textbf{t}, Version 1}', 'code': 'one',
'continued': True}
--
Arnaud
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