将多个数据帧附加到不同工作表上的 excel

Appending multiple dataframes to excel on different sheets

我想将字典中的多个数据帧添加到一个 excel 文件中,每个数据帧都应该写在 sheet 中。 Sheen 名字实际上是字典的关键字。以下代码

for key in df_dict:
    df = df_dict[key]
    df.to_excel('data-frames.xlsx', sheet_name=key, index=False)

只写最后一个数据帧。所以,我只看到一个sheet。另一方面,描述为 append_df_to_excel() 方法不起作用。我得到的错误是没有这样的方法,尽管 pandas 版本是 1.4.2.

...
AttributeError: 'DataFrame' object has no attribute 'append_df_to_excel'

In [2]: import pandas as pd
In [2]: print(pd.__version__)
1.4.2

我该如何解决?

你能试试这个代码吗?

for key in df_dict:
    df = df_dict[key].copy()
    with pd.ExcelWriter('data-frames.xlsx', mode='a') as writer:  
           df.to_excel(writer, sheet_name=key)

这是一种完成您所要求的方法:

import pandas as pd
df_dict = {f'key_{i}':pd.DataFrame([[i+1,i+2,i+3],['a','b','c']], columns=['first','second','third']) for i in range(4)}
[print(f'{k}:\n{df}') for k, df in df_dict.items()]
with pd.ExcelWriter('TestOutput.xlsx') as writer:
    for sheet, df in df_dict.items():
        df.to_excel(writer, index=None, sheet_name=sheet)

输入

key_0:
  first second third
0     1      2     3
1     a      b     c
key_1:
  first second third
0     2      3     4
1     a      b     c
key_2:
  first second third
0     3      4     5
1     a      b     c
key_3:
  first second third
0     4      5     6
1     a      b     c

输出

Excel file TestOutput.xlsx with four sheets named key_1, key_1, key_3, and key_4, each containing 3 columns named first, second, and third with two rows of data.