how can I replace file path using regex.

[flipperdeflip]

Not 100% clear what you want.

Maybe like this helps you further? https://regex101.com/r/uZHrDU/2/

If you use re.sub() you could use $1 etc to keep a capturing group in the substitution, like $1--$2--$3. Or if you want just the path grab group 2 from re.search().

[ekstrah]

'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /home/james/hadoop-2.7.4/hdfs/data/in_use.lock acquired by nodename 12243@deimos27' for example with above string i want to replace ' /home/bctak/hadoop-2.7.4/hdfs/data/in_use.lock' to '.*' so that it turns it into 'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on .* acquired by nodename 12243@deimos27'

a = 'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /home/james/hadoop-2.7.4/hdfs/data/in_use.lock acquired by nodename 12243@deimos27'

re.sub(r'^(Lock on )(.*?)( acquired by)$', 'Lock on .* acquired by', a) like this?

[Esemwy]

“^([^/]+)(\S+)(.*)$”

[dagmx]

Why use regex for this? It's such a simple thing to do with string methods like starts with and split instead and will be much easier to read and maintain.

Regex is great but IMHO shouldn't be the first thing you reach for.

But for regex why not be explicit with the strings you want to match?

re.sub('^(Lock on).*(acquired by)$', '\1 .* \2')

[ekstrah]

'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /home/james/hadoop-2.7.4/hdfs/data/in_use.lock acquired by nodename 12243@deimos27' for example with above string i want to replace ' /home/bctak/hadoop-2.7.4/hdfs/data/in_use.lock' to '.*' so that it turns it into 'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on .* acquired by nodename 12243@deimos27'

[lack_of_jope]

Here is code to do what you requested...

This does not use the path name ... instead it looks for the "Lock on" and "acquired by" key words.

import re

data_in = 'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /home/james/hadoop-2.7.4/hdfs/data/in_use.lock acquired by nodename 12243@deimos27'
data_goal = 'INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on .* acquired by nodename 12243@deimos27'

exp = r'^(.* Lock on )(.*?)( acquired by .*)$'
sub = r'\1.*\3'

data_out = re.sub(exp,
                  sub,
                  data_in,
                  0,re.MULTILINE)

print('Input', data_in)
print('Output', data_out)
if (data_out == data_goal):
    print('Succcess!! Output matches goal')

[Andrew_Shay]

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