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=======
csvlook
=======
Description
===========
Renders a CSV to the command line in a Markdown-compatible, fixed-width format:
.. code-block:: none
usage: csvlook [-h] [-d DELIMITER] [-t] [-q QUOTECHAR] [-u {0,1,2,3}] [-b]
[-p ESCAPECHAR] [-z FIELD_SIZE_LIMIT] [-e ENCODING] [-L LOCALE]
[-S] [--blanks] [--null-value NULL_VALUES [NULL_VALUES ...]]
[--date-format DATE_FORMAT] [--datetime-format DATETIME_FORMAT]
[-H] [-K SKIP_LINES] [-v] [-l] [--zero] [-V]
[--max-rows MAX_ROWS] [--max-columns MAX_COLUMNS]
[--max-column-width MAX_COLUMN_WIDTH]
[--max-precision MAX_PRECISION] [--no-number-ellipsis]
[-y SNIFF_LIMIT] [-I]
[FILE]
Render a CSV file in the console as a Markdown-compatible, fixed-width table.
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
--max-rows MAX_ROWS The maximum number of rows to display before
truncating the data.
--max-columns MAX_COLUMNS
The maximum number of columns to display before
truncating the data.
--max-column-width MAX_COLUMN_WIDTH
Truncate all columns to at most this width. The
remainder will be replaced with ellipsis.
--max-precision MAX_PRECISION
The maximum number of decimal places to display. The
remainder will be replaced with ellipsis.
--no-number-ellipsis Disable the ellipsis if --max-precision is exceeded.
-y SNIFF_LIMIT, --snifflimit SNIFF_LIMIT
Limit CSV dialect sniffing to the specified number of
bytes. Specify "0" to disable sniffing entirely, or
"-1" to sniff the entire file.
-I, --no-inference Disable type inference (and --locale, --date-format,
--datetime-format, --no-leading-zeroes) when parsing
the input.
If a table is too wide to display properly try piping the output to ``less -S`` or truncating it using :doc:`csvcut`.
If the table is too long, try filtering it down with grep or piping the output to ``less``.
See also: :doc:`../common_arguments`.
.. note::
The fractional part of a decimal numberal is always truncated. To control this truncation, use ``--no-inference`` along with ``--max-column-width``.
Examples
========
Basic use:
.. code-block:: bash
csvlook examples/testfixed_converted.csv
This tool is especially useful as a final operation when piping through other tools:
.. code-block:: bash
csvcut -c 9,1 examples/realdata/FY09_EDU_Recipients_by_State.csv | csvlook
If a data row contains more cells than the header row, csvlook will error. Use :doc:`csvclean` to remove such rows.
To ignore the extra cells, instead:
.. code-block:: bash
csvcut -C "" examples/bad.csv | csvlook
If these rows are at the top of the file (for example, copyright notices), you can skip the rows:
.. code-block:: bash
csvlook --skip-lines 1 examples/bad.csv
This error can also occur if csvlook incorrectly deduces ("sniffs") the CSV format. To disable CSV sniffing, set :code:`--snifflimit 0` and then, if necessary, set the :code:`--delimiter` and :code:`--quotechar` options yourself. Or, set :code:`--snifflimit -1` to use the entire file as the sample, instead of the first 1024 bytes.
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