Logging system aimed at initial sw development phase of life It also can log to syslog, but during development syslog is not always the best place to find things.
That's not what I need, or want.
- I do want a timestamp in column 0,
- But not the Year, Month, Day...
- Seconds and milliseconds from program start is good enough
- The log could be written to a file or console or both, or disabled.
bash$ pip3 install git+https://github.com/duaneellissd/msec_logger.git
Most pythonic logging is Unix syslog based. That's helpful if that's your goal, but it is not always your goal
Often, the syslog based solutions includes a long date/time stamp in column 0. When debugging, I prefer a different format where "time 0" is the time the application started. When debugging I am more interested in a time scale listed in seconds and milliseconds.
Yes, I could write to 'syslog' - but to be honest, why? I don't want to read or sort or sift my log messages from countless other log messages.
To that end, there are a few important features:
Important feature(1) A simple log format, a timestamp in column 0.
23.431 | started processing
23.480 | finished processing
Time zero is when the application started.
The above tells me that at 23.431 seconds since the application started the application "started processing" (what ever that is)
Important feature(2) simple time based math.
But more importantly, and this is the entire reason I prefer this method. This format lets me quickly perform "mental math" and determine that it took about 50 milliseconds "process"
When debugging, the timescales I most commonly deal with are in the order of seconds or milliseconds between operations, mental math using hours minutes and seconds is well, challanging I have to stop and think for minute or two, and "borrow 60" from the next column..
Important feature(3) identify the source
I've often been emailed a logfile from somebody and they ask me to review the log... Knowing more detail about the machine and person who ran the application is important to the debug process.
The timestamp at the start/stop of the log, is often helpful to determine when exactly the log was created, who did it, and other system details.
USAGE:
In your startup (main) file do this:
import msec_logger
def main():
...
# Optionally, send log to stdout
msec_logger.common_mSecLogger.open_console()
# Or to a log file..
msec_logger.common_mSecLogger.open_logfile( "somefilename.txt" )
# The above, will write to BOTH console and FILE.
...
Then, within classes where you want to use the debug log, do this:
import msec_logger
class MyClass( msec_logger.LogHelper ):
def __init__(self):
...
msec_logger.LogHelper.__init__()
...
def do_something(self):
# debug_print() auto-appends a newline.
self.debug_print("The answer is: %d" % 42 )
def do_foo(self):
# Where as debug_write() does not append a newline
self.debug_write("The answer is: %d\n" % 42 )
def foo(self):
self.debug_push() # temp disable.
self.debug_print("This will not print")
self.debug_pop() # restore.
'''