openpyxl获取表格测试数据（类与对象）

from openpyxl import load_workbook

class Case:
    def __init__(self):
        self.case_id = None
        self.title = None
        self.method = None
        self.url = None
        self.data = None
        self.expected = None
        self.actually = None
        self.result = None

class ReadData:
    def __init__(self, file_name):
        self.file_name = file_name
        self.wb = load_workbook(self.file_name)

    def read_data(self, sheet_name):
        self.sheet_name = sheet_name
        sheet =self.wb[self.sheet_name]

        case_data = []
        for row in range(2, int(sheet.max_row)+1):
            case = Case()
            case.case_id = sheet.cell(row, 1).value
            case.title = sheet.cell(row, 2).value
            case.method = sheet.cell(row, 3).value
            case.url = sheet.cell(row, 4).value
            case.data = sheet.cell(row, 5).value
            case.expected = sheet.cell(row, 6).value
            case_data.append(case)
        return case_data
if __name__=='__main__':