[req] New method: RequestSessionBase.find(). This method does what find_entities and find_one_entity did, except it returns the resultset itself. In addition, it accepts 'reverse_' arguments and check that the relations actually exists on the entity before executing the query. Also, reimplement find_one_entity and find_entity based on the new function so they benefit from the more complete implementation, and deprecate them. Note: List of values in kwargs are NOT supported in this initial implementation. Closes #3361290

@echo off
rem = """-*-Python-*- script
rem -------------------- DOS section --------------------
rem You could set PYTHONPATH or TK environment variables here
python -x "%~f0" %*
goto exit
 
"""
# -------------------- Python section --------------------
import sys
from os.path import join, dirname, normpath
sys.path.insert(0, normpath(join(dirname(__file__), '..', '..')))
from cubicweb.cwctl import run
run(sys.argv[1:])

DosExitLabel = """
:exit
rem """