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Python Logging to head of logfile?

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1

I use python logging and would like the latest log entry to be at the head of the log file, rather than the tail.

I cannot find anything in https://docs.python.org/2/howto/logging.html that appears useful for appending a logger record at the head of the logfile instead of the tail.

This is my logger: ("Carl" is my GoPiGo3 robot)

import logging

# create logger
logger = logging.getLogger('lifelog')
logger.setLevel(logging.INFO)
loghandler = logging.FileHandler('/home/pi/Carl/life.log')
logformatter = logging.Formatter('%(asctime)s|%(message)s',"%Y-%m-%d %H:%M")
loghandler.setFormatter(logformatter)
logger.addHandler(loghandler)
#logger.info('-------------')

and I log with:

 logger.info('<something to log>')

Is there a python logging module intrinsic solution?
Do I have to write my own handler?

python logging reverse

share|improve this question

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Inserting something at the beginning of a file displaces everything that comes after it, so the bigger the file, the more an insert will cost. That would go counter to the efforts of the logging module to be sparing in its use of resources.
  
  – BoarGules
  Mar 28 at 13:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Would it make more sense to reverse the file at the end of the program? Or just change what viewer you are using to display the file in reverse?
  
  – 0x5453
  Mar 28 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks @BoarGules, forgot about the physical aspect of file.
  
  – Alan McDonley
  Mar 28 at 14:08
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Actually @0x5453, reversing outside of the logging mechanism could corrupt, but using 'tac' to view the log file is not a bad solution.
  
  – Alan McDonley
  Mar 28 at 14:15
  

  
  
  
  

add a comment
 | 

1

I use python logging and would like the latest log entry to be at the head of the log file, rather than the tail.

I cannot find anything in https://docs.python.org/2/howto/logging.html that appears useful for appending a logger record at the head of the logfile instead of the tail.

This is my logger: ("Carl" is my GoPiGo3 robot)

import logging

# create logger
logger = logging.getLogger('lifelog')
logger.setLevel(logging.INFO)
loghandler = logging.FileHandler('/home/pi/Carl/life.log')
logformatter = logging.Formatter('%(asctime)s|%(message)s',"%Y-%m-%d %H:%M")
loghandler.setFormatter(logformatter)
logger.addHandler(loghandler)
#logger.info('-------------')

and I log with:

 logger.info('<something to log>')

Is there a python logging module intrinsic solution?
Do I have to write my own handler?

python logging reverse

share|improve this question

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Inserting something at the beginning of a file displaces everything that comes after it, so the bigger the file, the more an insert will cost. That would go counter to the efforts of the logging module to be sparing in its use of resources.
  
  – BoarGules
  Mar 28 at 13:56
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Would it make more sense to reverse the file at the end of the program? Or just change what viewer you are using to display the file in reverse?
  
  – 0x5453
  Mar 28 at 13:58
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks @BoarGules, forgot about the physical aspect of file.
  
  – Alan McDonley
  Mar 28 at 14:08
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Actually @0x5453, reversing outside of the logging mechanism could corrupt, but using 'tac' to view the log file is not a bad solution.
  
  – Alan McDonley
  Mar 28 at 14:15
  

  
  
  
  

add a comment
 | 

I use python logging and would like the latest log entry to be at the head of the log file, rather than the tail.

I cannot find anything in https://docs.python.org/2/howto/logging.html that appears useful for appending a logger record at the head of the logfile instead of the tail.

This is my logger: ("Carl" is my GoPiGo3 robot)

import logging

# create logger
logger = logging.getLogger('lifelog')
logger.setLevel(logging.INFO)
loghandler = logging.FileHandler('/home/pi/Carl/life.log')
logformatter = logging.Formatter('%(asctime)s|%(message)s',"%Y-%m-%d %H:%M")
loghandler.setFormatter(logformatter)
logger.addHandler(loghandler)
#logger.info('-------------')

and I log with:

 logger.info('<something to log>')

Is there a python logging module intrinsic solution?
Do I have to write my own handler?

python logging reverse

share|improve this question

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

import logging

# create logger
logger = logging.getLogger('lifelog')
logger.setLevel(logging.INFO)
loghandler = logging.FileHandler('/home/pi/Carl/life.log')
logformatter = logging.Formatter('%(asctime)s|%(message)s',"%Y-%m-%d %H:%M")
loghandler.setFormatter(logformatter)
logger.addHandler(loghandler)
#logger.info('-------------')

 logger.info('<something to log>')

share|improve this question

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

share|improve this question

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

asked Mar 28 at 13:52

Alan McDonleyAlan McDonley

4166 bronze badges

1 Answer
1

active

oldest

votes

1

The Answer: I should not want to do this.

Because:

Inserting something at the beginning of a file displaces everything
that comes after it, so the bigger the file, the more an insert will
cost. That would go counter to the efforts of the logging module to be
sparing in its use of resources. – BoarGules Mar 28 at 13:56

Using 'tac' to view the log file is a good solution.

share|improve this answer

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges

add a comment
 | 

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1

The Answer: I should not want to do this.

Because:

Inserting something at the beginning of a file displaces everything
that comes after it, so the bigger the file, the more an insert will
cost. That would go counter to the efforts of the logging module to be
sparing in its use of resources. – BoarGules Mar 28 at 13:56

Using 'tac' to view the log file is a good solution.

share|improve this answer

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges

add a comment
 | 

1

The Answer: I should not want to do this.

Because:

Inserting something at the beginning of a file displaces everything
that comes after it, so the bigger the file, the more an insert will
cost. That would go counter to the efforts of the logging module to be
sparing in its use of resources. – BoarGules Mar 28 at 13:56

Using 'tac' to view the log file is a good solution.

share|improve this answer

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges

add a comment
 | 

The Answer: I should not want to do this.

Because:

Inserting something at the beginning of a file displaces everything
that comes after it, so the bigger the file, the more an insert will
cost. That would go counter to the efforts of the logging module to be
sparing in its use of resources. – BoarGules Mar 28 at 13:56

Using 'tac' to view the log file is a good solution.

share|improve this answer

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges

share|improve this answer

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges

answered May 12 at 13:34

Alan McDonleyAlan McDonley

4166 bronze badges