csvstack¶
Description¶
Stack up the rows from multiple CSV files, optionally adding a grouping value to each row:
usage: csvstack [-h] [-d DELIMITER] [-t] [-q QUOTECHAR] [-u {0,1,2,3}] [-b]
[-p ESCAPECHAR] [-z MAXFIELDSIZE] [-e ENCODING] [-S] [-H] [-v]
[-l] [--zero] [-g GROUPS] [-n GROUP_NAME] [--filenames]
FILE [FILE ...]
Stack up the rows from multiple CSV files, optionally adding a grouping value.
positional arguments:
FILE The CSV file(s) to operate on. If omitted, will accept
input on STDIN.
optional arguments:
-h, --help show this help message and exit
-g GROUPS, --groups GROUPS
A comma-separated list of values to add as "grouping
factors", one for each CSV being stacked. These will
be added to the stacked CSV as a new column. You may
specify a name for the grouping column using the -n
flag.
-n GROUP_NAME, --group-name GROUP_NAME
A name for the grouping column, e.g. "year". Only used
when also specifying -g.
--filenames Use the filename of each input file as its grouping
value. When specified, -g will be ignored.
See also: Arguments common to all tools.
Examples¶
Contrived example: joining a set of homogoenous files for different years:
csvstack -g 2009,2010 examples/realdata/FY09_EDU_Recipients_by_State.csv examples/realdata/Datagov_FY10_EDU_recp_by_State.csv