python openpyxl打开文件关闭问题

workbook=openpyxl.load_workbook(filename)

sheet_list=workbook.sheetnames

sheet=workbook[sheet_name]

sheet.max_row

sheet.max_column

sheet.cell(x,y)

cell.value

sheet.rows: 返回一个生成器对象

sheet.columns:返回一个生成器对象

work.close()

cell(x,y,value)

import openpyxl
from shutil import copyfile
class ReadXsl:
    def __init__(self):
        self.workbook = None
        self.sheet_list = None
        self.sheet = None
        self.max_row = 0
        self.max_col = 0
    # 打开文件
    def open_file(self, file_name):
        self.workbook = openpyxl.load_workbook(filename=file_name)
        self.sheet_list = self.workbook.sheetnames
        self.sheet = self.workbook[self.sheet_list[0]]
        self.max_row = self.sheet.max_row
        self.max_col = self.sheet.max_column
    # 设置当前sheet
    def set_sheet(self, sheet_name):
        self.sheet = self.workbook[sheet_name]
        # 更新max_row与max_col
        self.max_row = self.sheet.max_row
        self.max_col = self.sheet.max_column
    def read_lines(self):
        all_list = []
        for row in self.sheet.rows:
            line_list = []
            for cell in row:
                line_list.append(cell.value)
            all_list.append(line_list)
        return all_list
    def read_dict(self) -> list:
        all_list = []
        title_list = []
        # 将title添加到一个list中
        for row in list(self.sheet.rows)[0]:
            title_list.append(row.value)
        # 遍历内容
        for rows in list(self.sheet.rows)[1:]:
            content_list = []
            for cell in rows:
                content_list.append(cell)
            all_list.append(dict(zip(title_list, content_list)))
        return all_list
class WriteXsl(object):
    def __init__(self):
        self.workbook = None
        self.file = None
        self.sheet = None
    # 复制文件
    def copy_file(self, src_file, new_file):
        copyfile(src_file, new_file)
        self.file = new_file
        self.workbook = openpyxl.load_workbook(new_file)
    # 设置当前工作sheet
    def set_sheet(self, sheet_name):
        self.sheet = self.workbook[sheet_name]
    # 写入内容
    def write(self, row, col, value):
        self.sheet.cell(row, col, value)
    # 关闭文件
    def close(self):
        self.workbook.close()
if __name__ == '__main__':
    file_name = r'D:\test_data.xlsx'
    new_file_name = r'D:\test_data.xlsx'
    r = ReadXsl()
    w = WriteXsl()
    r.open_file(file_name=file_name)
    w.copy_file(file_name, new_file_name)
    for sheet in r.sheet_list:
        r.set_sheet(sheet)
        w.set_sheet(sheet)
        for col in range(1, r.max_col):
            w.write(col + 1, 8, 'pass')
    w.close()
    print("文件写入完成!")