displacy displaCy.py is a NLP visualizer. It's a Python port of displaCy.js. It can be used to visualize POS relationships detected using spaCy's syntactic parser.

The following settings are available:

You can find the current theme settings in app/static/displacy.css. All elements contained in the SVG output come with tags and data attributes and can be styled flexibly using CSS. By default, the currentColor of the element is used for colouring,meaning only need to change the color property in CSS.

The following classes are available:

Additionally, you can use these attributes as attribute selectors:

Using a combination of those selectors and some basic CSS logic, you can create pretty powerful templates to style the elements based on their role and function in the parse. Here are a few examples:

/* Format all words in 12px Helvetica and grey */

.displacy-word {
    font: 12px Helvetica, Arial, sans-serif;
    color: grey;
}


/* Make all noun phrases (tags that start with "NN") green */

.displacy-tag[data-tag^="NN"] {
    color: green;
}


/* Make all right arrows red and hide their labels */

.displacy-arc[data-dir="right"],
.displacy-arrowhead[data-dir="right"] {
    color: red;
}

.displacy-label[data-dir="right"] {
    display: none;
}


/* Hide all tags for verbs (tags that start with "VB") that are NOT the base form ("VB") */

.displacy-tag[data-tag^="VB"]:not([data-tag="VB"]) {
    display: none;
}


/* Only display tags if word is hovered (with smooth transition) */

.displacy-tag {
    opacity: 0;
    transition: opacity 0.25s ease;
}

.displacy-word:hover + .displacy-tag {
    opacity: 1;
}

displaCy lets you define custom attributes via the JSON representation of the parse on both words and arcs:

"words": [
    {
        "tag": "NNS",
        "text": "Robots",
        "data": [
            [ "custom", "your value here" ],
            [ "example", "example text here" ]
        ]
    }
]

Custom attributes are added as data attributes prefixed with data-, so their names shouldn't contain spaces or special characters. If added to words, the data attributes are attached to the token (.displacy-token), if added to arcs, they're attached to the arrow (.displacy-arrow):

<text class="displacy-token" data-custom="your value here" data-example="example text here">...</text>