在Python中的同一个Excel工作表中写入多个数据框，一个在另一个下

Question

复制代码：

import numpy as np 
import pandas as pd

# Create a Dataframe
df1 = pd.DataFrame(np.random.rand(8).reshape(4,2),columns=['X','Y']);print(df1.shape)
df2 = pd.DataFrame(np.random.rand(6).reshape(3,2),columns=['X','Y']);print(df2.shape)
df3 = pd.DataFrame(np.random.rand(10).reshape(5,2),columns=['X','Y']);print(df3.shape)

上述三个数据框具有相同的列但不同的行，需要在同一张Excel表格中逐一写入。预期输出如下所示。

注意：数据框数量可能会有所不同

Answer 1

这是执行此操作的一种方法：

dfs = [df1, df2, df3]
startrow = 0
with pd.ExcelWriter('output.xlsx') as writer:
    for df in dfs:
        df.to_excel(writer, engine="xlsxwriter", startrow=startrow)
        startrow += (df.shape[0] + 2)

或者，如果您希望工作表顶部有一个标题：

dfs = [df1, df2, df3]
with pd.ExcelWriter('output.xlsx') as writer:
    dfs[0].to_excel(writer, engine="xlsxwriter", startrow=0)
    startrow = dfs[0].shape[0] + 2
    for df in dfs[1:]:
        df.to_excel(writer, engine="xlsxwriter", startrow=startrow, header=False)
        startrow += (df.shape[0] + 2)