多个DataFrame到Excel [重复]

Question

如何将多个数据框导出到一个 Excel 工作表。我有 2 个数据框。有时可能超过 2 个数据帧。

cars = {'name': ['Audi','VW'],
    'modell': ["A4","Golf"]
    }

cars2 = {'name': ['BMW','MB'],
    'modell': ["3er","e-class"]
    }

df = pd.DataFrame(cars, columns= ['name', 'modell'])
writer = pd.ExcelWriter('pandas_simple.xlsx', engine='xlsxwriter')
df.to_excel(writer, sheet_name='Sheet1')
writer.save()

Answer 1

您的问题不是关于写入 excel（您知道该怎么做），而是关于连接数据帧，您可以为此使用 pandas.concat。

在此示例中，我创建了两张表，其中一张数据集垂直连接，另一张数据集水平连接，作为奖励，您知道如何将多张工作表保存到同一个文件中。

cars = {'name': ['Audi','VW'],
    'modell': ["A4","Golf"]
    }

cars2 = {'name': ['BMW','MB'],
    'modell': ["3er","e-class"]
    }
## assuming that all your dataframes have the same set of columns
dataFrames = [pd.DataFrame(d) for d in [cars, cars2]]
with pd.ExcelWriter('pandas_simple.xlsx', engine='xlsxwriter') as writer:
  vertical = pd.concat(dataFrames, axis=0) # if the dataframes have the same columns
  horizontal = pd.concat(dataFrames, axis=1) # if the dataframes have the same indices
  
  vertical.to_excel(writer, sheet_name='Vertically')
  horizontal.to_excel(writer, sheet_name='Horizontally')

Answer 2

你希望数据框去哪里？

此代码会将它们并排放置在同一个工作表上。

import pandas as pd

cars1 = {'name': ['Audi','VW'],
    'modell': ["A4","Golf"]
    }

cars2 = {'name': ['BMW','MB'],
    'modell': ["3er","e-class"]
    }
all_cars = [cars1, cars2]

writer = pd.ExcelWriter('pandas_simple.xlsx', engine='xlsxwriter')
startcol = 0

for car in all_cars:
  df = pd.DataFrame(car, columns= ['name', 'modell'])
  df.to_excel(writer, sheet_name='Sheet1', startcol=startcol, index=None)
  startcol += len(df.columns)
writer.save()