Robust regex

[Joseph L. Casale]

Trying to robustly parse a string that will have key/value pairs separated
by three pipes, where each additional key/value (if more than one exists)
will be delineated by four more pipes.

string = 'key_1|||value_1||||key_2|||value_2'
regex = '((??!\|\|\|).)+)(?:\|\|\|)((??!\|\|\|).)+)(?:\|\|\|\|)?'

I am not convinced this is the most effective or safest, any opinions would
be greatly appreciated!

jlc

 

[John Gordon]

Trying to robustly parse a string that will have key/value pairs separated
by three pipes, where each additional key/value (if more than one exists)
will be delineated by four more pipes.
string = 'key_1|||value_1||||key_2|||value_2'
regex = '((??!\|\|\|).)+)(?:\|\|\|)((??!\|\|\|).)+)(?:\|\|\|\|)?'
I am not convinced this is the most effective or safest, any opinions would
be greatly appreciated!

Regexes may be overkill here. A simple string split might be better:

string = 'key_1|||value_1||||key_2|||value_2'
pairs = string.split('||||')
for pair in pairs:
keyval = pair.split('|||')
print '%s=%s' % (keyval[0], keyval[1])

 

[Joseph L. Casale]

Regexes may be overkill here. A simple string split might be better:

Yup, and much more robust as I was looking for.

Thanks everyone!
jlc