class_docstr: Stores draws from one or more chains.
  
  Returned by methods of a ``Model``. Users will not instantiate this class directly.
  
  A `Fit` instance works like a Python dictionary. A user-friendly views of draws
  is available via ``to_frame``.
docstr: Returns array with shape (stan_dimensions, num_chains * num_samples)
docstr_tok: ["Returns","array","with","shape","(","stan_dimensions",",","num_chains","*","num_samples",")"]
file_path: pystan/stan/fit.py
imports: import collections
  import json
  from math import ceil
  from typing import Generator, Tuple, cast
  import numpy
  import simdjson
label_desc: Use image node_id 4 for calling the Fit obj's underlying member method code with example usage: obj.__getitem__(param) and returns: view, np