pyquery is not installed in the running Python. Run `python -m pip install pyquery`. The PyPI name and the import name match (`pyquery`), so this is just a missing install.

## The error

```text
ModuleNotFoundError: No module named 'pyquery'
```

## Fix it

1. **Install pyquery**

```
python -m pip install pyquery
```
Expected: `Successfully installed pyquery-...` with lxml and cssselect.

2. **Confirm**

```
python -c "from pyquery import PyQuery; print(PyQuery('hi').text())"
```
Expected: prints `hi`.

## When this applies

- any pyquery import fails naming `pyquery`
- a fresh env for a jQuery-style scraping script

## When it does NOT apply

- `cannot import name 'etree' from 'lxml'` means pyquery IS installed but lxml is broken (Python 3.12 vs old lxml)
- `cannot import name 'PyQuery' from 'pyquery'` is the shadowing problem

## Compatibility

pyquery 2.x. Needs lxml; on Python 3.12+ make sure lxml is 4.9.3+.

## Why it happens

The package was never installed into the active interpreter. pyquery scripts move between machines often, and the import is the first thing that notices.

## Edge cases

- If the import then fails on `etree` from lxml, your lxml is too old for your Python. Upgrade lxml.
- pyquery is a thin wrapper over lxml. If lxml itself will not install on your platform, pyquery cannot work either.