CODEWITHSUNDEEP
python-3.xlist
Learner
Learner

Reputation: 41

Reading from a file how to append strings to a list until a specific marker in python

I have a input text file:

  This file contains information of students who are joining picnic:
     @@@ bob alice rhea john 
     mary alex roma
     peter &##&

Now I would like to append students name in a list in a line when find @@@ marker & stop appending when find &##& marker. Output should be(using python):

bob alice rhea john mary alex roma peter

Upvotes: 1

Views: 183

Answers (2)

xio
xio

Reputation: 640

You can use this method

txt = """This file contains information of students who are joining picnic:
     @@@ bob alice rhea john 
     mary alex roma
     peter &##&"""

or :

txt = open("./file.txt").read()  

ls = txt.split("@@@")[1].split("&##&")[0].split()
print(ls)

This prints :

['bob', 'alice', 'rhea', 'john', 'mary', 'alex', 'roma', 'peter']

Upvotes: 1

Tim Biegeleisen
Tim Biegeleisen

Reputation: 520878

Using re.findall with re.sub:

inp = """This file contains information of students who are joining picnic:
@@@ bob alice rhea john 
mary alex roma
peter &##&"""

output = re.sub(r'\s+', ' ', re.findall(r'@@@\s+(.*?)\s+&##&', inp, flags=re.DOTALL)[0])
print(output)  # bob alice rhea john mary alex roma peter

If you want a list, then use:

output = re.split(r'\s+', re.findall(r'@@@\s+(.*?)\s+&##&', inp, flags=re.DOTALL)[0])
print(output)

This prints:

['bob', 'alice', 'rhea', 'john', 'mary', 'alex', 'roma', 'peter']

Upvotes: 1

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