CODEWITHSUNDEEP
pythonlogging
Sky
Sky

Reputation: 429

Print specific string at the beginning of each line in log file

How can I setup python's module logging so that every line it prints to the file starts with a specific string?

Upvotes: 0

Views: 308

Answers (2)

Joe Halliwell
Joe Halliwell

Reputation: 1177

You can do this via the log formatter. Here's a simple example configuring it via logging.basicConfig:

import logging
logging.basicConfig(format="Hello at %(asctime)s %(message)s: %(levelname)s")
logging.warning("world")

Upvotes: 1

mrk
mrk

Reputation: 10406

Using python logging

Formatting the Output

You can pass any variable that can be represented as a string from your program as a message to your logs. If you for example want to log the process ID along with the level and message, you can do something like this:

import logging

logging.basicConfig(format='%(process)d-%(levelname)s-%(message)s')
logging.warning('This is a Warning')

# Output:
# 18472-WARNING-This is a Warning

For further details see documentation on realpython.

Upvotes: 0

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