使用 pandas xlsxwriter 写入 excel 表中的多行

Question

我正在尝试使用 xlsxwriter 将值写入 excel 工作表。

当尝试将数据写入第二行时，数据会覆盖到第一行本身。由于我是 xlsx 作家的新手，我无法弄清楚在哪里迭代。

import pandas as pd
from pandas import ExcelWriter


def outputInExcel(valueToExcel):
    with ExcelWriter('pandas.xlsx', mode='A', engine='xlsxwriter') as writer:
        # write operation perform
        valueToExcel.to_excel(writer,startrow=1, header=False)
        worksheet = writer.sheets['Sheet1']
        workbook = writer.book
        header_format = workbook.add_format({
            'bold': True,
            'text_wrap': True,
            'valign': 'top',
            'fg_color': '#D7E4BB',
            'border': 1})

        for row_num,col_num,value in enumerate(valueToExcel.columns.values):
            worksheet.write(0, col_num + 1, value, header_format)
        writer.save()


file = "Search.xlsx"#image  reference
df = pd.read_excel(file)
for index, row in df.iterrows():
    valueToExcel = pd.DataFrame({
        'Manager': [row['Manager']], 'Policy Name': [row['Policy Name']], 'Numbers': [row['Numbers'], 'Source IP': [row['Source']], 'Destination IP': [row['Destination']]
    })
    outputInExcel(valueToExcel)

我期待这样的输出。

我得到这样的输出。

Answer 1

您的代码存在一些问题；您每次都覆盖同一行，然后每行都重新启动编写器，因此效率不高。我的建议是一次性编写整个数据框：

writer = ExcelWriter('pandas.xlsx', mode='A', engine='xlsxwriter')
worksheet = writer.sheets['Sheet1']
workbook = writer.book
header_format = workbook.add_format({
  'bold': True,
  'text_wrap': True,
  'valign': 'top',
  'fg_color': '#D7E4BB',
  'border': 1
})
# write the header separately so you can format it
for col_num, value in enumerate(['Manager', 'Policy Name', 'Numbers', 'Source IP', 'Destination IP']):
  worksheet.write(0, col_num + 1, value, header_format)

df = pd.read_excel(file)
# if you only want specific columns
df = df[['Manager', 'Policy Name', 'Numbers', 'Source', 'Destination']]
df.to_excel(writer, sheet_name=name, index=False, header=False, startrow=1)
writer.save()

我尽量保持它与您的代码相同，我只是删除了循环并将代码移出函数