Ever wondered if you could just sprinkle a few print() statements in your Python scripts and call it a day for debugging or monitoring? Or maybe you’ve heard people talking about “logging” and weren’t quite sure what the fuss was about. This article breaks down the practical differences between simple print scripts and using professional logging libraries—for anyone who’s bumped into unexpected bugs, spent hours chasing elusive errors, or tried to convince a teammate why “print debugging” isn’t always the best idea.
Let’s cut到重点: The real headache comes when a script grows, gets deployed somewhere you can’t easily peek into, or is used by someone else. At that point, relying on print() is a bit like leaving sticky notes everywhere hoping someone will read them. Logging, on the other hand, is like setting up a smart surveillance system—you get the right info, at the right time, in the right place. This article will walk through exactly how print scripts and logging differ, where each makes sense, and (here’s the juicy bit) how international standards around “verified trade” data have surprisingly similar issues of traceability and reliability.
Here’s how I started back in my first internship: I’d write something like this to trace what my code was doing:
def process_order(order):
print("Processing order:", order)
# ... more code ...
print("Order processed successfully!")
It works—until it doesn’t. Once, I shipped such a script to production (rookie mistake!). Someone ran it on a server. Then the server crashed. The only “logs” were pages of print statements, mixed with system messages, making it nearly impossible to figure out what happened. Worse, all the output got lost after a system upgrade.
Next time, a senior dev nudged me: “Try the logging module.” I rewrote the code:
import logging
logging.basicConfig(filename='orders.log', level=logging.INFO)
def process_order(order):
logging.info(f"Processing order: {order}")
# ... more code ...
logging.info("Order processed successfully!")
Suddenly, I had a log file. If something went wrong, I could check what happened, when, and even distinguish between info, warnings, and errors. Bonus: logs could be rotated, sent to a remote server, or formatted for automated analysis.
This isn’t just my opinion. The official Python logging documentation spells out these differences in detail, and real-world failures (like this infamous case) show what happens when teams cut corners.
Here’s a story that might sound unrelated, but actually nails the point: In 2019, a logistics company in Germany and a supplier in Vietnam got caught in a tangled audit because the Vietnamese team kept trade records as simple printouts (no digital logs). German customs, following WCO standards, demanded verifiable, tamper-proof logs. The printouts were rejected, leading to shipment delays and penalty fees.
This echoes what we see in code: if you rely on “print” (whether for trade or software), you’re at the mercy of missing context, lost data, and a lack of accountability. Verified digital logging is not just a “nice-to-have”—it’s the backbone of traceable, auditable systems.
To get a second opinion, I reached out to a compliance officer at a Fortune 500 supply chain firm. Her words:
“In our field, every transaction must be logged in a tamper-evident system. Printouts or console output are never accepted as evidence. We follow OECD guidelines (source) for data retention and verification.”
In software, the lesson is similar: for anything serious—finance, healthcare, logistics—logging isn’t optional. Even in open source, projects like Django mandate logging for audit trails (Django docs).
Okay, but let’s not get too high and mighty. Sometimes, print is exactly what you need—quick debugging, scripts that run once, or teaching code to beginners. I still use print when I want to check a variable’s value in a throwaway script. But the moment I need history, filtering, or sharing logs with teammates, it’s logging all the way.
| Feature | Print Script | Logging Library |
|---|---|---|
| Persistence | No (unless manually saved) | Yes (files, databases, remote servers) |
| Filtering by Level | No | Yes (DEBUG/INFO/WARNING/ERROR) |
| Formatting | Manual | Automatic (timestamps, etc.) |
| Integration with Systems | Limited | Excellent (alerting, dashboards) |
| Auditability | Poor | Good (meets compliance needs) |
You might be surprised, but the same issues show up in international trade. Different countries have different standards for what counts as a “verified” transaction log. Here’s a quick comparison:
| Country/Region | Standard Name | Legal Basis | Executing Authority |
|---|---|---|---|
| European Union | AEO (Authorized Economic Operator) | EU Customs Code (Reg. 952/2013) | National Customs (per country) |
| United States | CTPAT (Customs-Trade Partnership Against Terrorism) | Trade Act of 2002 | U.S. Customs and Border Protection (CBP) |
| China | AEO (Accredited) | Decree 237 of GACC | General Administration of Customs of China (GACC) |
| Japan | AEO | Customs Law (Amended 2020) | Japan Customs |
Notice: All these standards require digital, auditable, tamper-evident logs. No “printouts” or console-only records are ever enough.
Let’s say Company A in the US wants to export to Company B in Germany. US law says you must keep shipment logs for 5 years, in a digital format that can be audited (see CBP documentation). Germany, under EU law, demands access to “non-repudiable” event logs.
Company A uses a simple export script that just prints shipment IDs to the console. When an audit happens, the German side refuses the print logs, citing EU Customs Code. Result? Potential fines, delayed shipments, and a forced upgrade to a real logging solution. This is not hypothetical: export.gov has documented similar disputes.
In my own work, shifting from “print everywhere” to structured logging was like switching from scribbled notes to a proper journal. The learning curve is small, but the benefits—especially when things go wrong—are enormous. Standards bodies like the WCO, OECD, and national customs agencies all agree: if you want reliability, auditability, and trust, logging is non-negotiable.
My advice? If you’re just learning or hacking around, print is fine. But for anything that needs to last, be shared, or stand up to professional scrutiny, switch to logging as soon as possible. Set up logging.basicConfig, point it to a file, and thank yourself later.
For teams dealing with cross-border trade or regulated industries, review your data retention and logging policies now—before a customs officer or auditor does it for you. And if you ever get nostalgic for print debugging, just remember that story of the lost shipment in Vietnam. No one wants to be that person.
If you want to see a real logging setup, DM me or check out my sample repo (link upon request). Don’t wait for disaster to strike—make your logs count!