code: def is_pytz_timezone(tz):
      if not isinstance(tz, dt.tzinfo):
          return False
      module = type(tz).__module__
      return module == "pytz" or module.startswith("pytz.")
  
imports: import datetime
  from calendar import monthrange
  from functools import lru_cache
  from importlib import resources
  from pathlib import Path
  from typing import Optional
  from hypothesis.errors import InvalidArgument
  from hypothesis.internal.validation import check_type, check_valid_interval
  from hypothesis.strategies._internal.core import sampled_from
  from hypothesis.strategies._internal.misc import just, none
  from hypothesis.strategies._internal.strategies import SearchStrategy
  from hypothesis.strategies._internal.utils import defines_strategy
label_desc: Use image node_id 1 for calling a global function with example usage: is_pytz_timezone(tz) and returns: unknown, False