ArgumentParser {argparse} | R Documentation |
ArgumentParser
creates a parser object that acts as
a wrapper to Python's argparse module
ArgumentParser(..., python_cmd = NULL)
... |
Arguments cleaned and passed to Pythons argparse.ArgumentParser() |
python_cmd |
Python executable for |
ArgumentParser
returns a parser object which contains
an add_argument
function to add arguments to the parser,
a parse_args
function to parse command line arguments into
a list, a print_help
and print_usage
function to print
usage information. See code examples, package vignette,
and corresponding python module for more information on how to use it.
A big thanks to Martin Diehl for a bug report.
Python's argparse
library, which this package is based on,
is described here: http://docs.python.org/library/argparse.html
parser <- ArgumentParser(description='Process some integers') parser$add_argument('integers', metavar='N', type="integer", nargs='+', help='an integer for the accumulator') parser$add_argument('--sum', dest='accumulate', action='store_const', const='sum', default='max', help='sum the integers (default: find the max)') parser$print_help() # default args for ArgumentParser()$parse_args are commandArgs(TRUE) # which is what you'd want for an Rscript but not for interactive use args <- parser$parse_args(c("--sum", "1", "2", "3")) accumulate_fn <- get(args$accumulate) print(accumulate_fn(args$integers))