[ACCEPTED]-Regex: How to match sequence of key-value pairs at end of string-key-value
The negative zero-width lookahead is (?!pattern).
It's 15 mentioned part-way down the re module documentation page.
(?!...)
Matches if 14 ... doesn’t match next. This is a negative 13 lookahead assertion. For example, Isaac 12 (?!Asimov) will match 'Isaac ' only if it’s 11 not followed by 'Asimov'.
So you could use 10 it to match any number of words after a 9 key, but not a key using something like 8 (?!\S+:)\S+.
And the complete code would look like this:
regex = re.compile(r'''
[\S]+: # a key (any word followed by a colon)
(?:
\s # then a space in between
(?!\S+:)\S+ # then a value (any word not followed by a colon)
)+ # match multiple values if present
''', re.VERBOSE)
matches = regex.findall(my_str)
Which 7 gives
['key1: val1-words ', 'key2: val2-words ', 'key3: val3-words']
If you print the key/values using:
for match in matches:
print match
It 6 will print:
key1: val1-words
key2: val2-words
key3: val3-words
Or using your updated example, it 5 would print:
Thème: O sombres héros
Contraintes: sous titrés
Author: nicoalabdou
Tags: wakatanka productions court métrage kino session humour cantat bertrand noir désir sombres héros mer medine marie trintignant femme droit des femmes nicoalabdou pute soumise
Posted: 06 June 2009
Rating: 1.3
Votes: 3
You could turn each key/value 4 pair into a dictionary using something like 3 this:
pairs = dict([match.split(':', 1) for match in matches])
which would make it easier to look 2 up only the keys (and values) you want.
More 1 info:
- Python re module documentation
- Python Regular Expression HOWTO
- Perl Regular Expression Reference "perlreref"
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