code: def parse(cls, tzinfo_string: str) -> dt_tzinfo:
      tzinfo: Optional[dt_tzinfo] = None
  
      if tzinfo_string == "local":
          tzinfo = tz.tzlocal()
  
      elif tzinfo_string in ["utc", "UTC", "Z"]:
          tzinfo = tz.tzutc()
  
      else:
          iso_match = cls._TZINFO_RE.match(tzinfo_string)
  
          if iso_match:
              sign: Optional[str]
              hours: str
              minutes: Union[str, int, None]
              sign, hours, minutes = iso_match.groups()
              seconds = int(hours) * 3600 + int(minutes or 0) * 60
  
              if sign == "-":
                  seconds *= -1
  
              tzinfo = tz.tzoffset(None, seconds)
  
          else:
              tzinfo = tz.gettz(tzinfo_string)
  
      if tzinfo is None:
          raise ParserError(
              f"Could not parse timezone expression {tzinfo_string!r}."
          )
  
      return tzinfo
  
imports: import re
  import sys
  from datetime import datetime, timedelta
  from datetime import tzinfo
  from functools import lru_cache
  from typing import Any, ClassVar, Dict, Iterable, List, Match, Optional, Pattern, SupportsFloat, SupportsInt, Tuple, Union, cast, overload
  from dateutil import tz
  from arrow import locales
  from arrow.constants import DEFAULT_LOCALE
  from arrow.util import next_weekday, normalize_timestamp
label_desc: Use image node_id 1 for calling the TzinfoParser obj's underlying member method code with example usage: obj.parse(cls, tzinfo_string) and returns: tzinfo