units

The astropy.units module handles defining, converting between, and performing arithmetic with physical quantities.

Skills
Scientific
0

What it does and how to use it

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Install (Claude Code)

mkdir -p .claude/skills/units && curl -fsSL https://doutorai.pt/data/lib/skills__units.md -o .claude/skills/units/SKILL.md

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Content

# Units and Quantities (astropy.units)

The `astropy.units` module handles defining, converting between, and performing arithmetic with physical quantities.

## Creating Quantities

Multiply or divide numeric values by built-in units to create Quantity objects:

```python
from astropy import units as u
import numpy as np

# Scalar quantities
distance = 42.0 * u.meter
velocity = 100 * u.km / u.s

# Array quantities
distances = np.array([1., 2., 3.]) * u.m
wavelengths = [500, 600, 700] * u.nm
```

Access components via `.value` and `.unit` attributes:
```python
distance.value  # 42.0
distance.un

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