[Solved] I need help to understand logic and solve code using python

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In your code you are opening the file in with statement, that means it closes automatically. No need to call close() explicitly.

For any string manipulation/searching it’s good to know Regular expression (in Python re module). For counting variables you could use Counter from itertools. Here’s an example:

from collections import Counter
import re

with open('logfile.txt', 'r') as f:
    data_in = f.read()

columns = re.findall(r'([\d\/]+)\s+([\d\.]+)\s+([\d:]+)\s+([a-zA-Z]+)', data_in)
c = Counter(columns)

for (column_1, column_2, column_3, column_4), count in c.items():
    print(column_1, column_2, column_3, column_4, count)

Prints:

9/1/2013 1.1.1.1 0:10 Established 2
9/1/2013 1.1.1.2 0:10 Failed 1
9/1/2013 1.1.1.1 0:10 Syn 1
9/2/2013 1.1.1.1 0:10 Established 4
9/2/2013 1.1.1.1 0:10 Failed 3
9/2/2013 1.1.1.2 0:10 Established 1
9/2/2013 1.1.1.1 0:10 Syn 2

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solved I need help to understand logic and solve code using python