将DataFrame列表保存到多表Excel电子表格中

Question

如何将DataFrame列表导出到一个Excel电子表格中？
国家文件to_excel:

注意
如果传递现有的ExcelWriter对象,则表单将添加到现有工作簿中.这可用于将不同的DataFrame保存到一个工作簿

writer = ExcelWriter('output.xlsx')
df1.to_excel(writer, 'sheet1')
df2.to_excel(writer, 'sheet2')
writer.save()

在此之后,我想我可以编写一个函数,将一个DataFrame列表保存到一个电子表格中,如下所示:

from openpyxl.writer.excel import ExcelWriter
def save_xls(list_dfs, xls_path):
    writer = ExcelWriter(xls_path)
    for n, df in enumerate(list_dfs):
        df.to_excel(writer,'sheet%s' % n)
    writer.save()

但是(带有两个小DataFrame的列表,每个都可以to_excel单独保存),会引发异常(编辑:删除跟踪):

AttributeError: 'str' object has no attribute 'worksheets'

大概是我没有ExcelWriter正确地打电话,我应该怎么做才能做到这一点？

Answer 1

你应该使用pandas自己的ExcelWriter类:

from pandas import ExcelWriter
# from pandas.io.parsers import ExcelWriter

然后该save_xls函数按预期工作:

def save_xls(list_dfs, xls_path):
    with ExcelWriter(xls_path) as writer:
        for n, df in enumerate(list_dfs):
            df.to_excel(writer,'sheet%s' % n)
        writer.save()

Answer 2

如果有人需要使用数据帧字典的示例，请执行以下操作：

from pandas import ExcelWriter

def save_xls(dict_df, path):
"""
Save a dictionary of dataframes to an excel file, with each dataframe as a seperate page
"""

writer = ExcelWriter(path)
for key in dict_df:
    dict_df[key].to_excel(writer, key)

writer.save()

例： save_xls(dict_df = my_dict, path = '~/my_path.xls')