python读写excel之xlrd、xlwt、xlutils

简介:

xlrd主要用来读excel,针对.xls格式;

xlwt主要用来写excel,针对.xls格式,超出excel 的单格内容长度上限32767,就会报错;

xlutils结合xlrd可以达到修改excel文件目的,需要注意的是你必须同时安装这三个库;

1、xlrd、xlwt、xlutils (只能操作.xls,不能操作.xlsx

使用xlrd读取excel:

 1 # 导入模块
 2 import xlrd
 3 #读取excel操作
 4 def read_excel(path):
 5     all = []
 6     workbook = xlrd.open_workbook(path)
 7     sheet = workbook.sheet_by_index(1)
 8     #逐行读取,并添加进list
 9     for i in range(sheet.nrows):   
10         rows = sheet.row_values(i)
11         #print(rows)
12         all.append(rows)
13     return all
14 
15 #程序运行
16 if __name__ == '__main__':
17     path = r'D:\WorkHome\python\excel_parse\71.xls'
18     value = read_excel(path);
19     for i in  value:
20         print(i)
21     print('读取成功')

excel读写实现

 1 import  xlrd
 2 import  xlwt
 3 from xlutils.copy import copy
 4 
 5 def read_data(path):
 6     excel_data = xlrd.open_workbook(path)
 7     sheet_name = excel_data.sheet_names()[1]
 8     sheet  = excel_data.sheet_by_index(1)
 9     #print(sheet.)
10     for i in range(sheet.nrows):
11         rows = sheet.row_values(i)
12         #rowval = rows.
13         #print(rows)
14         yield rows   ####如果不考虑内存损耗的话可以不用在这里使用迭代器
15 '''
16 ..................................................................
17 在这里放弃使用xlwt,是由于xlwt只能创建一个全新的excel文件,
18 然后对这个文件进行写入内容以及保存。但是大多数情况下是读
19 入一个excel文件,然后进行修改或追加,这个时候就需要xlutils了。
20 ..................................................................
21 def write_excel_xls(wpath,sheet_name,row ,nrow,ncol):
22     # 2. 创建Excel工作薄
23     myWorkbook = xlwt.Workbook(wpath)
24     # 3. 添加Excel工作表
25     mySheet = myWorkbook.add_sheet(sheet_name)
26     # 4. 写入数据
27     for j in range(ncol):
28         mySheet.write(nrow, j, row[j])
29     # 5. 保存
30     myWorkbook.save(wpath)
31     print('写入成功')
32 '''
33 def write_excel_xls_append(wpath, sheet_name, rowvalue, nrow, ncol):
34     workbook = xlrd.open_workbook(wpath)
35     '''
36     ###在这里是考虑到往文件中追加内容,而非覆盖
37     #worksheet = workbook.sheet_by_index(0)
38     #rows_old = worksheet.nrows    
39     '''
40     new_workbook = copy(workbook)
41     new_worksheet = new_workbook.get_sheet(0)
42     for j in range(ncol):
43         new_worksheet.write(nrow, j, rowvalue[j])
44     new_workbook.save(wpath)  # 保存工作簿
45     print("写入数据成功!")
46 
47 def main():
48       path = r'D:\WorkHome\python\excel_parse\71.xls'
49       wpath = r'D:\WorkHome\python\excel_parse\71_new.xls'
50       sheet_name = xlrd.open_workbook(path).sheet_names()[1]
51       nrow = 0
52       #nrow = xlrd.open_workbook(path).sheet_by_index(1).nrows
53       ncol = xlrd.open_workbook(path).sheet_by_index(1).ncols
54       read_data(path)
55       for rowvalue in  read_data(path):
56           #print(row)
57           write_excel_xls_append(wpath, sheet_name, rowvalue, nrow, ncol)
58           nrow += 1
59 
60 if __name__ == '__main__':
61     main()

 

posted on 2019-05-30 15:08  Cooper_73  阅读(541)  评论(0编辑  收藏  举报

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