code: def parse_check(check: str, reverse: bool = False) -> Tuple[str, str]:
      """Parse the constraint.
  
      Parameters
      ----------
      check : str
          String representation of the constraint.
      reverse : bool, optional (default=False)
          Whether to reverse the sign of the constraint.
  
      Returns
      -------
      pair : tuple
          Parsed constraint in the form of tuple (value, sign).
      """
      try:
          idx = 1
          float(check[idx:])
      except ValueError:
          idx = 2
          float(check[idx:])
      if reverse:
          reversed_sign = {"<": ">", ">": "<", "<=": ">=", ">=": "<="}
          return check[idx:], reversed_sign[check[:idx]]
      else:
          return check[idx:], check[:idx]
  
file_path: LightGBM/helpers/parameter_generator.py
imports: import re
  from collections import defaultdict
  from pathlib import Path
  from typing import Dict, List, Tuple
label_desc: Use image node_id 4 for calling a global function with example usage: parse_check(check, reverse) and returns: check,  reversed_sign, check,  check