How to use the pprofile.FileTiming function in pprofile

def unrestrictedTraverse_spy(self, path, *args, **kw):
    return orig_unrestrictedTraverse(self, path, *args, **kw)
unrestrictedTraverse_spy_func_code = unrestrictedTraverse_spy.func_code
try:
    import OFS.Traversable
    orig_unrestrictedTraverse = OFS.Traversable.Traversable.unrestrictedTraverse
except (ImportError, AttributeError):
    pass
else:
    functools.update_wrapper(unrestrictedTraverse_spy, orig_unrestrictedTraverse)
    OFS.Traversable.Traversable.unrestrictedTraverse = unrestrictedTraverse_spy

_ALLSEP = os.sep + (os.altsep or '')
PYTHON_EXPR_FUNC_CODE_SET = (ZRPythonExpr__call__func_code, PythonExpr__call__func_code)

class ZopeFileTiming(pprofile.FileTiming):
    def call(self, code, line, callee_file_timing, callee, duration, frame):
        f_code = frame.f_code
        if f_code is DB_query_func_code:
            self.profiler.sql_dict[frame.f_locals['query']].append(duration)
        elif f_code is ZODB_setstate_func_code:
            f_locals = frame.f_locals
            obj = f_locals['obj']
            try:
                oid = obj._p_oid
            except AttributeError:
                pass
            else:
                self.profiler.zodb_dict[
                    f_locals['self'].db().database_name
                ][oid].append(duration)
        elif f_code is unrestrictedTraverse_spy_func_code: