1#' Check if a string is lowercase.
2#'
3#' Return \code{TRUE} if all cased characters in the string are lowercase and there is at least one
4#' cased character, \code{FALSE} otherwise.
5#'
6#' @param str A character vector.
7#'
8#' @return A logical vector.
9#'
10#' @references \url{https://docs.python.org/3/library/stdtypes.html#str.islower}
11#'
12#' @seealso \code{\link{pystr_isupper}}
13#'
14#' @examples
15#' pystr_islower("all lowercase!")
16#' pystr_islower("All Lowercase?")
17#' pystr_islower("abc123")
18#'
19#' @export
20pystr_islower <- function(str) {
21  return(pystr_islower_(str))
22}
23