csv

The csv module follows Go's encoding/csv package and exposes its whole-data operations.

read_all returns a list of string lists. Keyword arguments configure the corresponding Go Reader fields: comma=",", comment="", fields_per_record=0, lazy_quotes=false, and trim_leading_space=false.

write_all accepts a list of string lists. It supports comma="," and use_crlf=false, corresponding to Go's Writer fields. Parsing errors raise ParseError.

By default write_all returns the CSV text. Passing dest= streams the output into any writer object — an object with a write(data) method, such as an open fs file — instead, and the function returns unit:

import "csv"
import "fs"

var file = fs.create("scores.csv")
csv.write_all([["name", "score"], ["Ada", "10"]], dest=file)
file.close()

import "csv"

var rows = csv.read_all("name,score\nAda,10\nGoblin,12\n")
print(rows[1][0]) # Ada

var output = csv.write_all([
    ["name", "score"],
    ["Ada", "10"],
    ["Goblin", "12"],
])
print(output)

The delimiter arguments must be a single valid character. With fields_per_record=0, the reader infers the field count from the first record; a negative value allows records of varying lengths. An empty comment disables comments. CSV values are always strings: numeric conversion, header handling, and mapping rows into dictionaries remain explicit application work.