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Display nested attribute dictionaries collapsibly in notebook output #10663

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Display nested attribute dictionaries collapsibly in notebook output #10663

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22 changes: 18 additions & 4 deletions xarray/core/formatting_html.py
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Original file line number Diff line number Diff line change
Expand Up @@ -62,10 +62,24 @@ def format_dims(dim_sizes, dims_with_index) -> str:


def summarize_attrs(attrs) -> str:
attrs_dl = "".join(
f"<dt><span>{escape(str(k))} :</span></dt><dd>{escape(str(v))}</dd>"
for k, v in attrs.items()
)
attrs_dl = ""
for k, v in attrs.items():
if isinstance(v, dict):
attr_id = "attrs-" + str(uuid.uuid4())

attrs_dl += "<div class='xr-attr-item'>"
attrs_dl += f"<input id='{attr_id}' class='xr-attr-in' type='checkbox'>"
attrs_dl += (
f"<label class='xr-attr-nested' for='{attr_id}'>{escape(str(k))} : "
)
attrs_dl += f"<span>({len(v)})</span></label>"
attrs_dl += "<span class='xr-attr-nested-inner'>"
attrs_dl += summarize_attrs(v)
attrs_dl += "</span></div>"
else:
attrs_dl += (
f"<dt><span>{escape(str(k))} :</span></dt><dd>{escape(str(v))}</dd>"
)

return f"<dl class='xr-attrs'>{attrs_dl}</dl>"

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47 changes: 47 additions & 0 deletions xarray/static/css/style.css
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Original file line number Diff line number Diff line change
Expand Up @@ -407,6 +407,53 @@ dl.xr-attrs {
word-break: break-all;
}

.xr-attr-item {
grid-column: 1/-1;
}

.xr-attr-item input {
display: none;
}

.xr-attr-item label.xr-attr-nested {
border: 0 !important;
}

.xr-attr label > span {
display: inline-block;
padding-left: 0.5em;
}

.xr-attr-item input + label.xr-attr-nested {
color: var(--xr-font-color0);
}

.xr-attr-in + label::before {
display: inline-block;
content: "►";
font-size: 11px;
width: 15px;
margin-left: -15px;
text-align: center;
}

.xr-attr-in:checked + label:before {
content: "▼";
}

.xr-attr-in:checked + label > span {
display: none;
}

.xr-attr-nested-inner {
display: none;
padding-left: 1em;
}

.xr-attr-in:checked ~ .xr-attr-nested-inner {
display: block;
}

.xr-icon-database,
.xr-icon-file-text2,
.xr-no-icon {
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