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.TH "CSVGREP" "1" "Aug 16, 2024" "2.2.0" "csvkit"
.SH NAME
csvgrep \- csvgrep Documentation
.SH DESCRIPTION
.sp
Filter tabular data to only those rows where certain columns contain a given value or match a regular expression:
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.nf
.ft C
usage: csvgrep [\-h] [\-d DELIMITER] [\-t] [\-q QUOTECHAR] [\-u {0,1,2,3}] [\-b]
[\-p ESCAPECHAR] [\-z FIELD_SIZE_LIMIT] [\-e ENCODING] [\-S] [\-H]
[\-K SKIP_LINES] [\-v] [\-l] [\-\-zero] [\-V] [\-n] [\-c COLUMNS]
[\-m PATTERN] [\-r REGEX] [\-f MATCHFILE] [\-i] [\-a]
[FILE]
Search CSV files. Like the Unix \(dqgrep\(dq command, but for tabular data.
positional arguments:
FILE The CSV file to operate on. If omitted, will accept
input as piped data via STDIN.
optional arguments:
\-h, \-\-help show this help message and exit
\-n, \-\-names Display column names and indices from the input CSV
and exit.
\-c COLUMNS, \-\-columns COLUMNS
A comma\-separated list of column indices, names or
ranges to be searched, e.g. \(dq1,id,3\-5\(dq.
\-m PATTERN, \-\-match PATTERN
A string to search for.
\-r REGEX, \-\-regex REGEX
A regular expression to match.
\-f MATCHFILE, \-\-file MATCHFILE
A path to a file. For each row, if any line in the
file (stripped of line separators) is an exact match
of the cell value, the row matches.
\-i, \-\-invert\-match Select non\-matching rows, instead of matching rows.
\-a, \-\-any\-match Select rows in which any column matches, instead of
all columns.
.ft P
.fi
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.sp
See also: \fI\%Arguments common to all tools\fP\&.
.sp
NOTE: Even though \(aq\-m\(aq, \(aq\-r\(aq, and \(aq\-f\(aq are listed as \(dqoptional\(dq arguments, you must specify one of them.
.SH EXAMPLES
.sp
Search for the row relating to Illinois:
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.INDENT 3.5
.sp
.nf
.ft C
csvgrep \-c 1 \-m ILLINOIS examples/realdata/FY09_EDU_Recipients_by_State.csv
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
Search for rows relating to states with names beginning with the letter \(dqI\(dq:
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.INDENT 3.5
.sp
.nf
.ft C
csvgrep \-c 1 \-r \(dq^I\(dq examples/realdata/FY09_EDU_Recipients_by_State.csv
.ft P
.fi
.UNINDENT
.UNINDENT
.sp
Search for rows that do not contain an empty state cell:
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.INDENT 3.5
.sp
.nf
.ft C
csvgrep \-c 1 \-r \(dq^$\(dq \-i examples/realdata/FY09_EDU_Recipients_by_State.csv
.ft P
.fi
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.sp
Perform a case\-insensitive search:
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.sp
.nf
.ft C
csvgrep \-c 1 \-r \(dq(?i)illinois\(dq examples/realdata/FY09_EDU_Recipients_by_State.csv
.ft P
.fi
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.UNINDENT
.sp
Remove comment rows:
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.INDENT 3.5
.sp
.nf
.ft C
printf \(dqa,b\en1,2\en# a comment\en3,4\(dq | csvgrep \-\-invert\-match \-c1 \-r \(aq^#\(aq
.ft P
.fi
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.sp
Get the indices of the columns that contain matching text (\fB\ex1e\fP is the \fI\%Record Separator (RS) character\fP):
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.INDENT 3.5
.sp
.nf
.ft C
csvgrep \-m 22 \-a \-c 1\- examples/realdata/FY09_EDU_Recipients_by_State.csv | csvformat \-M $\(aq\ex1e\(aq | xargs \-d $\(aq\ex1e\(aq \-n1 sh \-c \(aqecho $0 | csvcut \-n\(aq | grep 22
.ft P
.fi
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.sp
\fBNOTE:\fP
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.INDENT 3.5
This last example is not performant.
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.UNINDENT
.SH AUTHOR
Christopher Groskopf and contributors
.SH COPYRIGHT
2016, Christopher Groskopf and James McKinney
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