Format Your Output Like Picasso

The problem...

You know how to print. You've been doing it since the first article.

But right now your output is raw. Basic. It gets the job done — nothing more.

There's a difference between code that prints and code that communicates.

The idea!

Python's print() is more powerful than it looks.

You control the format. You control the precision. You control how numbers and text appear together.

Quick recap

You've already seen the basics:

name = "Bull"
age = 25
print(f"My name is {name} and I am {age} years old.")

Good. Now let's go further.

Formatting floats

Raw floats are often too long or too imprecise.

price = 3.14159265
print(price)                    # 3.14159265 — too many decimals
print(f"{price:.2f}")           # 3.14 — 2 decimal places
print(f"{price:.4f}")           # 3.1416 — 4 decimal places
print(f"{price:.0f}")           # 3 — no decimals

:.2f means: format as float with 2 decimal places.

Formatting integers

score = 1000000
print(f"{score}")               # 1000000 — hard to read
print(f"{score:,}")             # 1,000,000 — with thousands separator
print(f"{score:10}")            # right-aligned in 10 characters
print(f"{score:<10}")           # left-aligned in 10 characters

Combining numbers and text

name = "Bull"
score = 1547.891
rank = 3

print(f"Player: {name:<10} | Score: {score:>10.2f} | Rank: #{rank}")

Output → Player: Bull | Score: 1547.89 | Rank: #3

Aligned. Clean. Professional.

Going further — padding and alignment

print(f"{'Name':<10} {'Score':>10}")
print(f"{'Bull':<10} {1547.89:>10.2f}")
print(f"{'Horn':<10} {983.45:>10.2f}")
print(f"{'Red':<10} {2341.00:>10.2f}")

Output:

Name            Score
Bull          1547.89
Horn           983.45
Red           2341.00

A clean table. No external libraries. Just f-strings.

Percentage formatting

ratio = 0.857
print(f"{ratio:.0%}")    # 86%
print(f"{ratio:.1%}")    # 85.7%
print(f"{ratio:.2%}")    # 85.70%

What's really happening

Inside {} in an f-string, you can add a format spec after :.

It tells Python exactly how to display the value — width, alignment, precision, type.

The code doesn't change. The output does.

Heads up!

• :.2f — float with 2 decimals
• :, — thousands separator
• :<10 — left-aligned in 10 chars
• :>10 — right-aligned in 10 chars
• :.1% — percentage with 1 decimal

The mindset shift

Stop thinking: "print() just shows values."

Start thinking: "print() is a canvas. Format it."

What you should understand now

• f-strings accept format specs after : inside {}
• .2f controls float precision
• , adds thousands separator
• Alignment and width make output readable
• Percentage formatting is built in