code: def byte_string_dtypes(endianness="?", min_len=1, max_len=16):
      # type: (str, int, int) -> st.SearchStrategy[np.dtype]
      """Return a strategy for generating bytestring dtypes, of various lengths
      and byteorder.
  
      While Hypothesis' string strategies can generate empty strings, string
      dtypes with length 0 indicate that size is still to be determined, so
      the minimum length for string dtypes is 1.
      """
      if min_len == 0:
          note_deprecation(
              "generating byte string dtypes for unspecified length ('S0') "
              "is deprecated. min_len will be 1 instead.",
              since="2019-09-09",
          )
          min_len = 1
      if max_len == 0:
          note_deprecation(
              "generating byte string dtypes for unspecified length ('S0') "
              "is deprecated. max_len will be 1 instead.",
              since="2019-09-09",
          )
          max_len = 1
  
      order_check("len", 1, min_len, max_len)
      return dtype_factory(
          "S", list(range(min_len, max_len + 1)), None, endianness
      )
  
imports: from __future__ import absolute_import, division, print_function
  import math
  import re
  from collections import namedtuple
  import numpy
  import hypothesis.internal.conjecture.utils
  import hypothesis.strategies._internal.core
  from hypothesis import Verbosity, assume
  from hypothesis._settings import note_deprecation
  from hypothesis.errors import InvalidArgument
  from hypothesis.internal.compat import PY2, hrange, integer_types, quiet_raise, string_types
  from hypothesis.internal.coverage import check_function
  from hypothesis.internal.reflection import proxies, reserved_means_kwonly_star
  from hypothesis.internal.validation import check_type, check_valid_interval
  from hypothesis.reporting import current_verbosity
  from hypothesis.strategies._internal import SearchStrategy
  from hypothesis.utils.conventions import UniqueIdentifier, not_set
label_desc: Use image node_id 18 for calling a global function with example usage: byte_string_dtypes(endianness, min_len, max_len) and returns: dtype_factory