openpyxl use (1)

openpyxl

openpyxl is a python library for reading and writing excel files. The purpose of this article is to introduce how to use openpyxl to process excel files.

install openpyxl

pip install openpyxl

create a workbook

• Use Workbook to create an empty workbook (with a sheet by default)

from openpyxl import Workbook
wb = Workbook()

• Use load_workbook to create a workbook based on an existing excel file

from openpyxl import load_workbook
wb = load_workbook(filename='fileName.xlsx')

Create and get a worksheet from a workbook

• Check which Sheets are included in excel

sheet_list = wb.sheetnames

• Get the default selected (activated) Sheet

ws = wb.active

• Get the specified Sheet according to the Sheet name

ws = wb['SheetName']

• Get each Sheet

for sheet in wb:
    print(sheet)

• create sheet

# 在最后一个位置创建 Sheet
ws1 = wb.create_sheet('mySheet')
# 在第一个位置创建 Sheet
ws2 = wb.create_sheet('mySheet', 0)
# 在倒数第二个位置创建 Sheet
ws3 = wb.create_sheet('mySheet', -1)
# 也可以不传参数，它创建的 Sheet 名称默认由 Sheet 到 Sheetn 依次递增
ws4 = create_sheet()

Modify Sheet title

ws.title = 'customName'

Copy a Sheet

Note: The pictures and icons contained in the Sheet will not be copied. Sheets cannot be copied between workbooks, and workbooks opened in read-only or write-only mode cannot be copied.

wb.copy_worksheet(ws)

Manipulate the data in the Sheet

Get a single cell in Sheet

• method one

cell = ws['A1']
# 也可以给单元格赋值
ws['A1'] = '哈哈'

• Method 2: Use the cell() method

# 三个参数 row：第几行 column：第几列 value：单元格的值（不传 value 则表示获取当前单元格）
ws.cell(row=1, column=1, value='哈哈')

get multiple cells

• Get the cells of a certain range (range)

# 表示获取三行四列的单元格
cells = ws['A1':'D3']

• Get range of rows and columns

# 获取第一行
row_one = ws[1]
# 第二列
col_two = ws['B']
# 第二行到第三行
row_range = ws[2:3]
# 第一列到第四列
col_range = ws['A':'D']

• The iter_rows and iter_cols methods get the row and column cells of the specified unit

# 获取两行两列的单元格范围
ws.iter_rows(min_col=1, max_col=2, min_row=1, max_row=2)
ws.iter_cols(min_col=1, max_col=2, min_row=1, max_row=2)

• get all rows and all columns

# 所有行
rows = ws.rows
# 所有列
cols = ws.columns

• get only cell value

vals = ws.values
print(tuple(vals))
# values_only 标识为 True 表示只获取单元格的值
vals = ws.iter_rows(values_only=True)
print(tuple(vals))
vals = ws.iter_cols(values_only=True)
print(tuple(vals))

• Get the value of the cell

for cell in ws[1]:
    # 单元格的 value 属性
    print(cell.value)

save as a file

After a series of operations, you can use the save method to save the final modified workbook as a file

# 如果存在同名的文件则会进行覆盖且不会有任何警告
wb.save('myWb.xlsx')