code: def _read_data() -> DataFrame:
      df = package_csv(
          "sea_surface_temperature",
          "sea_surface_temperature.csv.gz",
          parse_dates=True,
          index_col=0,
      )
      df = df.rename(columns={"temperature (celsius)": "temperature"})
      df.index.name = "time"
      return df
  
imports: from __future__ import annotations
  import logging
  from typing import TYPE_CHECKING
  from ..util.sampledata import package_csv
label_desc: Use image node_id 1 for calling a global function with example usage: _read_data() and returns: df