class_docstr: Overlay on top of `csv.DictReader` which allows sampling.
class_docstr_tok: ["Overlay","on","top","of","`","csv.DictReader","`","which","allows","sampling","."]
code: def __init__(self, fraction, rng, *args, **kwargs):
      super().__init__(*args, **kwargs)
      self.fraction = fraction
      self.rng = rng
  
file_path: river/river/stream/iter_csv.py
imports: from __future__ import annotations
  import csv
  import datetime
  import random
  from ..None import base
  from .None import utils
label_desc: Use image node_id 1 to create a new DictReader object from inherited base classes: csv with example: obj = DictReader(fraction, rng)