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pluckr 0.0.5

Pluck columns from CSV files in the command line. Like cut or awk, but doesn't choke on delimiter escaping.

Latest Version: 0.0.9

Pluck columns from csv files in the commandline. Like cut or awk, but without choking on delimiter escaping.

install

pip install pluckr. Done.

usage

Grab columns 2 and 3 from stdin (-f is zero-indexed):

pluckr -f 1,2 < sample1.csv

Or straight from a file:

pluckr -f 2,1 sample1.csv

Your requested order is retained:

pluckr -f 1,2 sample1.csv != pluckr -f 2,1 sample1.csv

You can also use Python’s negative indices… grab the first and last cols:

pluckr -f 0,-1 sample1.csv

Fields that don’t exist (e.g. -f11111) will be ignored.

Skip header row(s):

cat sample1.csv | pluckr -s1

Grab all but the 2nd column (drop columns instead of selecting them):

pluckr -f 1 -i < sample1.csv

Read (and write) various delimiters:

pluckr -d, –out-delimiter=| < with-commas.csv > with-pipes.csv

Note that passing tabs as arguments can be awkward; in a pinch, use:

pluckr -d $’t’

help

Via –help:

usage: pluckr [-h] [-f FIELDS] [-i] [-d DELIMITER] [-q QUOTECHAR] [-s SKIP]
[infile]

Grab columns from csv input. http://github.com/philadams/pluckr

positional arguments:
infile input file (.csv)
optional arguments:
<kbd>-h, --help</kbd> show this help message and exit
<kbd>-f <var>FIELDS</var>, --fields <var>FIELDS</var></kbd>
 ordered list of columns to retain; zero-indexed
<kbd>-i, --inverse</kbd> invert column retention: drop those in -f
<kbd>-d <var>DELIMITER</var>, --delimiter <var>DELIMITER</var></kbd>
 field delimiter when reading infile
<kbd>-q <var>QUOTECHAR</var>, --quotechar <var>QUOTECHAR</var></kbd>
 field quotechar when reading infile
<kbd>-s <var>SKIP</var>, --skip <var>SKIP</var></kbd>
 number of rows to skip

future

  • allow -f to take columns by name when there’s a header row?
  • implement –out-** for output delimiters etc.
  • add out delimiter support
  • add out quotechar support
  • tests!!!
 
File Type Py Version Uploaded on Size
pluckr-0.0.5.tar.gz (md5) Source 2014-01-17 2KB
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