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.")
  
file_path: catboost/contrib/python/hypothesis/py2/hypothesis/strategies/_internal/datetime.py
imports: from __future__ import absolute_import, division, print_function
  import datetime
  from calendar import monthrange
  from hypothesis.internal.conjecture import utils
  from hypothesis.strategies._internal.strategies import SearchStrategy
label_desc: Use image node_id 1 for calling a global function with example usage: is_pytz_timezone(tz) and returns: unknown, False