python openpyxl读写excel
时间: 2023-10-02 12:04:17 浏览: 128
Python中的openpyxl库可以用于读写Excel文件。要使用openpyxl库,首先需要导入相关模块和类。例如,可以使用以下代码导入必要的模块和类:
```python
from openpyxl import Workbook, load_workbook
from openpyxl.styles import Border, Alignment
from datetime import datetime
```
导入模块后,可以使用`load_workbook()`函数加载Excel文件,并使用`[]`操作符指定要读取的工作表。例如:
```python
wb = load_workbook("sample.xlsx")
ws = wb["Sheet1"]
```
要写入Excel文件,可以使用`Workbook()`函数创建一个新的工作簿,并使用`create_sheet()`方法创建新的工作表。然后,可以使用`append()`方法将数据添加到工作表中。例如:
```python
wb = Workbook()
ws = wb.create_sheet("Sheet1")
ws.append(["Header1", "Header2", "Header3"])
ws.append([1, 2, 3])
```
同时,请记得在使用openpyxl库之前先安装它。可以使用以下命令来安装openpyxl:
```
pip install openpyxl
```
相关问题
python openpyxl 遍历 excel
可以使用 openpyxl 库读取 Excel 文件,并使用 for 循环遍历每个单元格。示例代码如下:
```
from openpyxl import load_workbook
# 打开 Excel 文件
workbook = load_workbook('example.xlsx')
# 选择第一个工作表
worksheet = workbook.active
# 遍历每个单元格
for row in worksheet.iter_rows():
for cell in row:
print(cell.value)
```
也可以指定某一列或某一行遍历,如:
```
for row in worksheet.iter_rows(min_row=1, max_row=3, min_col=1, max_col=3):
for cell in row:
print(cell.value)
```
python的openpyxl读写excel
OpenPyXL是一个用于Python的库,专门用于读取和写入Microsoft Excel 2010 xlsx/xlsm/xltx/xltm文件格式(即XML-based Excel 2007+格式)。它提供了丰富的功能,让你能够方便地操作Excel的工作簿、工作表、单元格、数据验证规则等。
**读取Excel文件:**
1. 首先,你需要安装`openpyxl`,可以通过pip进行安装:`pip install openpyxl`
2. 使用`load_workbook()`函数打开Excel文件:
```python
import openpyxl
workbook = openpyxl.load_workbook('example.xlsx')
sheet = workbook['Sheet1'] # 如果是特定的工作表
```
3. 通过`sheet.cell()`或`sheet.iter_rows()`等方式访问单元格内容:
```python
cell_value = sheet.cell(row=1, column=1).value
for row in sheet.iter_rows(min_row=1, max_col=3): # 遍历指定行数和列数的单元格
for cell in row:
print(cell.value)
```
**写入Excel文件:**
1. 创建`openpyxl.Workbook()`实例创建新工作簿,或使用`load_workbook()`打开现有工作簿后修改:
```python
from openpyxl import Workbook
# 创建新的工作簿
new_book = Workbook()
sheet = new_book.active # 默认活动工作表
# 写入单元格
sheet['A1'] = 'Hello, OpenPyXL'
sheet.cell(row=1, column=2, value='This is a test')
# 保存到文件
new_book.save('output.xlsx')
```
阅读全文
相关推荐
















