`read_csv()` is a function in the Python `pandas` library that is used to import data from a CSV (Comma Separated Values) file into a `pandas` DataFrame. The function takes in the file path or file object of the csv file as its first argument, and additional parameters can be passed in to specify things like column names, the delimiter used in the file, whether the first row should be treated as a header, and more. The function returns a DataFrame containing the data from the csv file.

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