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csvgrep

Filter CSV rows with string and pattern matching. Included in csvkit. More information: https://csvkit.readthedocs.io/en/latest/scripts/csvgrep.html.

Find rows that have a certain string in column 1:

csvgrep -c {{1}} -m {{string_to_match}} {{data.csv}}

Find rows in which columns 3 or 4 match a certain regular expression:

csvgrep -c {{3,4}} -r {{regular_expression}} {{data.csv}}

Find rows in which the "name" column does NOT include the string "John Doe":

csvgrep -i -c {{name}} -m "{{John Doe}}" {{data.csv}}