code: def p_delta_unit(p):
      """delta_unit : MINUTE
      | HOUR
      | DAY"""
      p[0] = p[1].lower()[:1]
  
imports: from datetime import datetime, date, time, timedelta
  from guild import _yacc
  from .None import trlex
label_desc: Use image node_id 44 for calling a global function with example usage: p_delta_unit(p) without return types