算盘 从Python学习会计：T帐户，分类帐和会计科目表 检查作为工作示例： 指定帐户系统，类似于： chart = Chart ( assets = [ 'cash' ], capital = [ 'equity' , 'retained_earnings' ], liabilities = [ 'debt' ], income = [ 'income' ], expenses = [ '