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From the below string, I want to extract the words between delimters [ ] like 'Service Current','Service','9991','1.22':
str='mysrv events Generating Event Name [Service Current], Category [Service] Test [9991] Value [1.22]'
How can I extract the same in python?
Thanks in advance Kris
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The simplest way to extract the string between two parentheses is to use slicing and string. find() . First, find the indices of the first occurrences of the opening and closing parentheses. Second, use them as slice indices to get the substring between those indices like so: s[s.
Using index() + loop to extract string between two substrings. In this, we get the indices of both the substrings using index(), then a loop is used to iterate within the index to find the required string between them.
To find a string between two strings in Python, use the re.search() method.
How to Find a String Between Two Symbols. We can combine the index() function with slice notation to extract a substring from a string. The index() function will give us the start and end locations of the substring.
First, avoid using str as a variable name. str already has a meaning in Python and by defining it to be something else you will confuse people.
Having said that you can use the following regular expression:
>>> import re
>>> print re.findall(r'\[([^]]*)\]', s)
['Service Current', 'Service', '9991', '1.22']
This works as follows:
\[ match a literal [ ( start a capturing group [^]] match anything except a closing ] * zero or more of the previous ) close the capturing group \] match a literal ]
An alternative regular expression is:
r'\[(.*?)\]'
This works by using a non-greedy match instead of matching anything except ].
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