Reads or writes CSV data. The reader reads a file or a list strings returns a list of lists whose values are of the same type

Reads UTF-8 characters from a file and returns a Stream of lists of strings

Reads characters from a device and returns a Stream of lists of strings

Reads a string and returns a list of lists of strings

The writer takes a list (write_row) or a list of lists (wrote) and returns a string containing a single row or newline-separated rows