Printing an usage message from an OptionParser object — print_help • optparse

print_help() print an usage message from an OptionParser object, usually called by parse_args() when it encounters a help option.

Usage

print_help(object)

Arguments

object: A OptionParser instance.

Value

print_help() uses the cat function to print out a usage message. It returns invisible(NULL).

References

Python's optparse library, which inspired this package, is described here: https://docs.python.org/3/library/optparse.html

See also

parse_args() OptionParser()