I am a beginner in python and I would like to use re.split() to find a specific value from a string.

For example I have this input string :

input = "type: type1, blablabla, blabla, role: user (user1) and admin (admin1), blablabla, use: use1"

I would like to extract this output : user (user1) and admin (admin1)

I have tried some regex like role:\s(\w+\s), :

output = re.split('role:\s(\w+\s),', input)

My thinking :

#role:\s : match 'role:' and space
#(\w+\s) : match one or more occurence of word characters and space
#,       : end with comma 

Which parts are missing in the second part of the regex to match any words, separate by space, that end with a comma ?

A solution will be helpful but above all I would like to understand how it works.

Thanks for your help

>Solution :

In general, I only use regular expression when I absolutely must. I like those solutions that are easy to understand. For that, I am going to suggest going with longer code:

found = None
for element in input.split(","):
    if "role:" in element:
        found = element.replace("role:", "").strip()
        break
# found is 'user (user1) and admin (admin1)'

The way this code work is when you split by the comma, you get:

['type: type1',
 ' blablabla',
 ' blabla',
 ' role: user (user1) and admin (admin1)',
 ' blablabla',
 ' use: use1']

Then the if statement test for the presence of "role:" in each element and parse out the needed output.

Update

If you must use regular expression:

matched = re.search(r"role:\s([^,]+)", input)
print(matched.group(1))  # 'user (user1) and admin (admin1)'

As you can see, this solution is shorter, but more cryptic.