code: def _read_data() -> pd.DataFrame:
      """ """
      import pandas as pd
  
      data = package_csv(
          "commits",
          "commits.txt.gz",
          parse_dates=True,
          header=None,
          names=["day", "datetime"],
          index_col="datetime",
      )
      data.index = cast(
          Any,
          pd.to_datetime(data.index, utc=True).tz_convert("US/Central"),
      )
      data["time"] = data.index.time  # type: ignore[attr-defined]
  
      return data
  
imports: from __future__ import annotations
  import logging
  from typing import TYPE_CHECKING, Any, cast
  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: data