code: def timezones():
      # type: () -> st.SearchStrategy[dt.tzinfo]
      """Any timezone in the Olsen database, as a pytz tzinfo object.
  
      This strategy minimises to UTC, or the smallest possible fixed
      offset, and is designed for use with
      :py:func:`hypothesis.strategies.datetimes`.
      """
      all_timezones = [pytz.timezone(tz) for tz in pytz.all_timezones]
      # Some timezones have always had a constant offset from UTC.  This makes
      # them simpler than timezones with daylight savings, and the smaller the
      # absolute offset the simpler they are.  Of course, UTC is even simpler!
      static = [pytz.UTC]  # type: list
      static += sorted(
          (t for t in all_timezones if isinstance(t, StaticTzInfo)),
          key=lambda tz: abs(tz.utcoffset(dt.datetime(2000, 1, 1))),
      )
      # Timezones which have changed UTC offset; best ordered by name.
      dynamic = [tz for tz in all_timezones if tz not in static]
      return st.sampled_from(static + dynamic)
  
imports: from __future__ import absolute_import, division, print_function
  import datetime
  import pytz
  from pytz.tzfile import StaticTzInfo
  import hypothesis.strategies._internal.core
label_desc: Use image node_id 1 for calling a global function with example usage: timezones() and returns: st