code: def category_files(category: str) -> list:
      """Helper function to return all filenames in the category directory."""
      files = [
          x.stem
          for x in list(Path(f"pandas_ta/{category}/").glob("*.py"))
          if x.stem != "__init__"
      ]
      return files
  
file_path: pandas-ta/pandas_ta/utils/_core.py
imports: import re
  from pathlib import Path
  from sys import float_info
  from numpy import argmax, argmin
  from pandas import DataFrame, Series
  from pandas.api.types import is_datetime64_any_dtype
  from pandas_ta import Imports
label_desc: Use image node_id 2 for calling a global function with example usage: category_files(category) and returns: files