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4 changes: 4 additions & 0 deletions docs/api/qiskit-addon-utils/0.3/_package.json
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{
"name": "qiskit-addon-utils",
"version": "0.3.1"
}
93 changes: 93 additions & 0 deletions docs/api/qiskit-addon-utils/0.3/_toc.json
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{
"title": "Qiskit addon utilities",
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{
"title": "API index",
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56 changes: 56 additions & 0 deletions docs/api/qiskit-addon-utils/0.3/coloring.mdx
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---
title: coloring (v0.3)
description: API reference for qiskit_addon_utils.coloring in qiskit-addon-utils v0.3
in_page_toc_min_heading_level: 2
python_api_type: module
python_api_name: qiskit_addon_utils.coloring
---

<span id="module-qiskit_addon_utils.coloring" />

<span id="coloring-qiskit-addon-utils-coloring" />

# coloring

`qiskit_addon_utils.coloring`

Utility methods for coloring.

### auto\_color\_edges

<Function id="qiskit_addon_utils.coloring.auto_color_edges" github="https://github.com/Qiskit/qiskit-addon-utils/tree/stable/0.3/qiskit_addon_utils/coloring/automatic_coloring.py#L22-L42" signature="auto_color_edges(edges)">
Color the input edges of an undirected graph such that no two incident edges share a color.

**Parameters**

**edges** ([*Sequence*](https://docs.python.org/3/library/collections.abc.html#collections.abc.Sequence)*\[*[*tuple*](https://docs.python.org/3/library/stdtypes.html#tuple)*\[*[*int*](https://docs.python.org/3/library/functions.html#int)*,* [*int*](https://docs.python.org/3/library/functions.html#int)*]]*) – The edges describing an undirected graph.

**Returns**

A dictionary mapping each edge to an integer representation of a color.

**Return type**

[dict](https://docs.python.org/3/library/stdtypes.html#dict)\[[tuple](https://docs.python.org/3/library/stdtypes.html#tuple)\[[int](https://docs.python.org/3/library/functions.html#int), [int](https://docs.python.org/3/library/functions.html#int)], [int](https://docs.python.org/3/library/functions.html#int)]
</Function>

### is\_valid\_edge\_coloring

<Function id="qiskit_addon_utils.coloring.is_valid_edge_coloring" github="https://github.com/Qiskit/qiskit-addon-utils/tree/stable/0.3/qiskit_addon_utils/coloring/validation.py#L20-L38" signature="is_valid_edge_coloring(coloring)">
Check whether an edge coloring scheme is valid.

An edge coloring is valid if no two edges of the same color share a node.

**Parameters**

**coloring** ([*dict*](https://docs.python.org/3/library/stdtypes.html#dict)*\[*[*tuple*](https://docs.python.org/3/library/stdtypes.html#tuple)*\[*[*int*](https://docs.python.org/3/library/functions.html#int)*,* [*int*](https://docs.python.org/3/library/functions.html#int)*],* [*int*](https://docs.python.org/3/library/functions.html#int)*]*) – A mapping from edges to integer representations of colors.

**Returns**

A boolean indicating whether the input coloring is valid.

**Return type**

[bool](https://docs.python.org/3/library/functions.html#bool)
</Function>

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