percentify 0.2.1

A tiny, zero-dependency Python toolkit for percentages — calculate, compare, format, and distribute.

% Percentify %

Percentify is a Python helper that turns "part of a whole" into a clean percentage.
Stop typing (part / whole) * 100 and worrying about division by zero.

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✨ What It Does

A zero-dependency Python toolkit for all things percentages:

• percent — what percentage is part of whole?
• percent_change — how much did a value increase or decrease?
• percent_diff — how far apart are two values?
• percent_distribute — split a total into weighted shares.
• percent_format — turn any number into a clean "25.0%" string.

All functions handle edge cases (division by zero, negative values) safely and let you control decimal precision.

• Calculates what percentage one number is of another.
• Handles divide-by-zero safely (returns 0.0 instead of crashing).
• Lets you choose how many decimal places you want to round your answer to.
• Has zero dependencies — just pure Python.

📦 Installation

pip install percentify

Usage

percent — Part of a Whole

from percentify import percent

percent(50, 200)          # → 25.0
percent(1, 3)             # → 33.33
percent(5, 0)             # → 0.0  (safe division by zero)
percent(7, 9, 4)          # → 77.7778  (custom decimals)

percent_change — Increase or Decrease

from percentify import percent_change

percent_change(100, 150)  # → 50.0   (50% increase)
percent_change(200, 150)  # → -25.0  (25% decrease)
percent_change(0, 100)    # → 0.0    (safe when old is zero)

percent_diff — Difference Between Two Values

from percentify import percent_diff

percent_diff(10, 20)      # → 66.67
percent_diff(50, 50)      # → 0.0

percent_distribute — Split a Total by Weights

from percentify import percent_distribute

percent_distribute(200, [1, 3])       # → [50.0, 150.0]
percent_distribute(100, [1, 1, 1])    # → [33.33, 33.33, 33.33]

percent_format — Format as a String

from percentify import percent_format

percent_format(25.0)                  # → "25.0%"
percent_format(33.3333, 1)            # → "33.3%"
percent_format(50, suffix=" percent") # → "50.0 percent"

🤝 Contributing

Contributions are welcome!

• If you have an idea (extra helpers, bug fixes or an idea):
• Fork this repo
• Create a branch
• Commit your changes
• Open a pull request

I try to keep it tiny on purpose, to discuss big new features first.