读取Excel数据封装

"""读取excel封装"""
import xlrd
import os

class SheetTypeError(object):
    pass
class ExcelReader(object):
    def __init__(self,excel_file,sheet_by):
        if os.path.exists(excel_file):
            self.excel_file = excel_file
            self.sheet_by = sheet_by
            self._data = list()

        else:
            raise FileNotFoundError("文件不存在")

    def data(self):
        #打开文件
        if not self._data:
            workbook = xlrd.open_workbook(self.excel_file)
            if type(self.sheet_by) not in [str,int]:
                raise SheetTypeError("请输入Str , Int")
            elif type(self.sheet_by) == str:
                sheet = workbook.sheet_by_name(self.sheet_by)
            elif type(self.sheet_by) == int:
                sheet = workbook.sheet_by_index(self.sheet_by)

            #读取sheet内容
            #返回list,元素：字典
            #格式[{"a":"a1","b":"b1"},{"a":"a2","b":"b2"}]
            #1、获取首行的信息
            title = sheet.row_values(0)
            #2、遍历测试行，首行组成dict,放在list
            for row in range(1,sheet.nrows):
                col_value = sheet.row_values(row)
                self._data.append(dict(zip(title,col_value)))

        return self._data

if __name__ == '__main__':
    test_data = ExcelReader("D:\20\Interface_Python\Params\test_data.xlsx",0)
    a=test_data.data()
    print(a)