Due to the temporary shutdown of the federal government beginning October 1, 2025, all Library of Congress buildings are closed and all public events are canceled until further notice. More. …

The Library of Congress (LC or sometimes LOC) is a research library in Washington, D.C., serving as the library and research service for the United States Congress and the de facto …

The Library of Congress provides Congress with objective research to inform the legislative process, administers the national copyright system, and manages the largest collection of …

May 21, 2025 · In this comprehensive guide, I‘ll walk you through everything you need to know about the pandas DataFrame .loc[] method – from basic usage to advanced techniques that …

Access a group of rows and columns by label (s) or a boolean array. .loc[] is primarily label based, but may also be used with a boolean array. Allowed inputs are: A single label, e.g. 5 or 'a', …

Apr 12, 2025 · One of the most powerful and frequently used features within pandas is the ability to access and manipulate data within a DataFrame. The .loc accessor in a DataFrame …

While the Library is closed for research, the Thomas Jefferson Building is open for visitors on Martin Luther King, Jr. Day, Presidents Day, Juneteenth National Independence Day, …

The LOC’s Congress.gov service provides highly searchable federal legislative information from bills and resolutions to teacher resources. A treasure trove of print, pictorial and audio-visual …

In the above example, we have used the loc[] property to select a single row from the DataFrame. The index parameter specifies custom row labels A, B, C, and D for the DataFrame.

The loc property gets, or sets, the value (s) of the specified labels. Specify both row and column with a label. To access more than one row, use double brackets and specify the labels, …