CODEWITHSUNDEEP
pythonpython-3.x
molychan
molychan

Reputation: 161

How can I split the second line when the keyword match two lines by python?

I have a log file like this

………………
19:07:57.166 [INFO]keyword = 3 ...
19:08:13.664 [INFO]keyword = 2 ...
………………
19:14:27.062 [INFO]keyword = 3 ...
19:14:43.061 [INFO]keyword = 2 ...
…………………………

How can I get only one result like "19:07:57.166" or "19:14:43.061" by keyword "keyword = 2" in python?

Upvotes: 1

Views: 78

Answers (3)

codrelphi
codrelphi

Reputation: 1065

regular expression (i.e.: re module is powerful to do a such task). Here I give you another way to achieve your goal:

# contains the logs data (e.g: it is an example)
lines = [
            "19:07:57.166 [INFO]keyword = 3 ...",
            "19:08:13.664 [INFO]keyword = 2 ...",
            "19:14:27.062 [INFO]keyword = 3 ...",
            "19:14:43.061 [INFO]keyword = 2 ...",
]

results = [] # contains all the results

for line in lines:
    line_split = line.split("[INFO]")
    if line_split[1][10] == '2':
        results.append(line_split[0].strip()) 

print(results)

Outputs:

['19:08:13.664', '19:14:43.061']

Upvotes: 0

Ajax1234
Ajax1234

Reputation: 71461

A possibility is to use re to transform your data into a list of dictionaries, making lookup with target keys a much cleaner process:

import re
data = [dict(zip(['val', 'keyword'], re.findall('^[\.\d:]+|(?<=keyword\s=\s)\d+', i))) for i in open('filename.txt')]
result = [i['val'] for i in data if int(i['keyword']) == 2]

Output:

['19:08:13.664', '19:14:43.061']

Upvotes: 1

Reznik
Reznik

Reputation: 2806

you can split each line by '19:07:57.166 [INFO]keyword = 3'.split('[INFO]')

or you can do it with regex

import re
line = '19:07:57.166 [INFO]keyword = 3'
result = re.match('(.*)\[INFO\](.*)', line)
result.group(1) # 19:07:57.166
result.group(2) # keyword = 3

Update

import re
line = '19:07:57.166 [INFO]keyword = 2'
result = re.match('(.*)\[INFO\]keyword = 2', line)
result.group(1) # 19:07:57.166

Upvotes: 1

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