I need your help with following regex. I have a text
"[Hello|Hi]. We are [inviting | calling] you at position [[junior| mid junior]|senior] developer."
using regex I want to get
[Hello|Hi]
[inviting | calling]
[[junior| mid junior]|senior]
the following rexeg (\[[^\[$\]\]]*\])
gives me
[Hello|Hi]
[inviting | calling]
[junior| mid junior]
so how should I fix it to get correct output?
Let's define your string and import re:
>>> s = "[Hello|Hi]. We are [inviting | calling] you at position [[junior| mid junior]|senior] developer."
>>> import re
Now, try:
>>> re.findall(r'\[ (?:[^][]* \[ [^][]* \])* [^][]* \]', s, re.X)
['[Hello|Hi]', '[inviting | calling]', '[[junior| mid junior]|senior]']
Consider this script:
$ cat script.py
import re
s = "[Hello|Hi]. We are [inviting | calling] you at position [[junior| mid junior]|senior] developer."
matches = re.findall(r'''\[ # Opening bracket
(?:[^][]* \[ [^][]* \])* # Zero or more non-bracket characters followed by a [, followed by zero or more non-bracket characters, followed by a ]
[^][]* # Zero or more non-bracket characters
\] # Closing bracket
''',
s,
re.X)
print('\n'.join(matches))
This produces the output:
$ python script.py
[Hello|Hi]
[inviting | calling]
[[junior| mid junior]|senior]
You can use a simple stack to do this instead of recursive regex
x="[Hello|Hi]. We are [inviting | calling] you at position [[junior| mid junior]|senior] developer.[sd[sd[sd][sd]]]"
l=[]
st=[]
start=None
for i,j in enumerate(x):
if j=='[':
if j not in st:
start = i
st.append(j)
elif j==']':
st.pop()
if not st:
l.append(x[start:i+1])
print l
Ouput: ['[Hello|Hi]', '[inviting | calling]', '[[junior| mid junior]|senior]', '[sd[sd[sd][sd]]]']
You may use the following code with PyPi regex module with a PCRE-like r'\[(?:[^][]++|(?R))*]' regex:
>>> import regex
>>> s = "[Hello|Hi]. We are [inviting | calling] you at position [[junior| mid junior]|senior] developer."
>>> r = regex.compile(r'\[(?:[^][]++|(?R))*]')
>>> print(r.findall(s))
['[Hello|Hi]', '[inviting | calling]', '[[junior| mid junior]|senior]']
>>>
See the regex demo.
The \[(?:[^][]++|(?R))*] matches a [, then zero or more sequences of 1+ chars other than ] and [ OR the whole bracketed expression [...], and then a closing ].
