### Generate Labels with Crosszip

Source: https://indrajeetpatil.github.io/crosszip

Use crosszip to apply a function to all combinations of elements from multiple lists, generating labels for machine learning. Ensure the crosszip library is installed.

```python
# @pyodide
# Label Generation for Machine Learning

from crosszip import crosszip


def create_label(category, subcategory, version):
    return f"{category}_{subcategory}_v{version}"


categories = ["cat", "dog"]
subcategories = ["small", "large"]
versions = ["1.0", "2.0"]

labels = crosszip(create_label, categories, subcategories, versions)
print(labels)

```

--------------------------------

### Test Power Function with Pytest Crosszip Parametrize

Source: https://indrajeetpatil.github.io/crosszip

Utilize the @pytest.mark.crosszip_parametrize marker to test a function with all combinations of provided parameter values. This requires pytest and crosszip to be installed.

```python
# @pyodide
# Testing Power Function

import math
import crosszip
import pytest


@pytest.mark.crosszip_parametrize(
    "base",
    [2, 10],
    "exponent",
    [-1, 0, 1],
)
def test_power_function(base, exponent):
    result = math.pow(base, exponent)
    assert result == base**exponent


print("Tests executed successfully.")

```

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