'Stop Printing, Start Logging!' (Logging Tutorial For Python Developers)

Logging is far more powerful than printing in Python. It really gives you a lot of free information, so in this video I will teach you the basics of how you can get started with using the logging module in Python, so that you can create far more detailed logs!

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00:00 Intro
00:24 import logging
00:34 What is logging?
00:46 Logging levels
03:39 Log file
04:20 Adding variables
05:50 Creating detailed logs
06:43 Formatting
12:40 Conclusion

[arhamsayyed]

A tutorial no one asked for but everyone needed

[higiniofuentes]

For the young developers: the creation of a log file is vital in production to quickly detect/follow any failure!

[SuperVirus]

Thank you for this video.
There is another reason why you should use the "old" method of string formatting instead of f-strings:
The message string is only expanded/formatted if it is printed/logged - so it will save some procesing power, especially for debug messages which a rarely enabled.
If you use a f-string it will be formatted before it is handed over to the logger - regardles if it is used or not.

[behnamheydarian]

It will be great if you add real-world examples in your videos.
It helps to understand where these modules are used

[Tryth]

Huh. I've been writing my own logging functions. This might come in handy in the next project. Thanks!

[bozok]

Tankyou for the video. It's another very informative and important subject. I have created a user snippet for logging and using it all the time.

[littlehuman]

exactly the tutorial I needed, I heard about logging few days ago and was planning to check it out

[kattamaran]

Nice start. Could use a better, real world example. Like combining it with a normal exception you run into and how to log that. Or maybe with a debug example where you try to follow a variable? Is that an example you would use it for in the real world? Im a beginner.. I usually struggle with youtube tutorials because they lack real world examples.

[nicflatterie]

Well done, to the point, clear, will look for your other videos.

[MrValVet]

I love your tutorials. Very well explained. Thanks!

[TiềnLêThanh-du]

exactly what I need right now, thanks!

[williamsusa]

What is the fastest way to learn Python?

[ShehlaGhaffar]

Thank you much, it worked all perfectly in the project at work, where we have build an AI chatbot for space sector training solutions.

[HitBoxMaster]

Are there even people running Python versions pre 3.6, where you don't have f-strings, or even worse, 2.7 where don't have the format() method? A more pertinent question still, why would even be concerned about this kind of backwards compatibility?
Really cool video though. Would've been cool to see real case use though

[martin_]

AFAIR a classic string formatting ala `log.error("Cant find file %s", filename)` is preferred, so tools and services like Sentry can properly group messages.

[SolidBuildersInc]

This was really an awesome share for debugging.

I recently found pdb.

import pdb

Can't recall how to istantiate it but you may get something out of it.

You can put break points and a host of things from the command line.

The 2 of these tools together would be a great thing to have in the tool box for complex applications.

I really like the logging of imported modules.

Breadcrumb Vacuum Cleaner

Kudos

[mariodemarco]

Great, already known, that logging lib is there, but this made it more clear. I just wonder if it possible to change config for the level during the code is excuted (e.g. use debug for some new code) while keeping warning for the rest. further, I figured out, that style="{" in the basicconfig enables better formatting like this {asctime:<20}

[joelhatsch]

Problem I have is how to handle the log output. either it's too detailed or not enough, or I need different level of detail in different parts of the code etc... ist there a good viewer for the logfile that would maybe thread the output, allowing to collapse/expand the threaded messages. integration in visual studio would be a plus 😀

[elpiloto]

Is it possible to raise an error automatically with the logging.error and logging.critical call?

[yashbhatt]

Please Please Pretty Please keep making videos like this. The world needs it. YOU ARE A PERSONAL HERO. 🤗