KeyError: "Not all names specified in 'columns' are found"

Question

我有一个如下所示的数据框

Date,cust,region,Abr,Number,,,dept
12/01/2010,Company_Name,Somecity,Chi,36,136,NaN,sales
12/02/2010,Company_Name,Someothercity,Nyc,156,NaN,41,mfg

tf = pd.read_clipboard(sep=',')

我正在尝试对 excel 文件进行一些操作

writer = pd.ExcelWriter('duck_data.xlsx',engine='xlsxwriter')
for (cust,reg), v in df.groupby(['cust','region']):
    v.to_excel(writer, sheet_name=f"DATA_{cust}_{reg}",index=False, columns = modified_col_list)
writer.save()

但是问题是写文件的时候，用unnamed:5，unnamed:6来表示empty column names。因此，我创建了一个如下所示的 modified_col_list 并将其作为输入传递给 to_excel 函数

ordiginal_col_list = ['Date','cust','region','Abr','Number',nan,nan,'dept']

modified_col_list = ['Date','cust','region','Abr','Number',' ',' ','dept']

但是我的objective是让empty column names as is在excel期间自己写。但这导致了以下错误

KeyError: "Not all names specified in 'columns' are found"

我希望我的输出如下所示（您可以看到列名是空的）

Answer 1

您可以使用：

writer = pd.ExcelWriter('duck_data.xlsx',engine='xlsxwriter')
for (cust,reg), v in df.groupby(['cust','region']):
    #if columns name has `Unnamed` replace by empty string
    #v.columns = ['' if 'Unnamed' in x else x for x in v.columns]
    #if columnshas missing values replace them to empty string
    v.columns = v.columns.to_series().fillna('')
    #removed columns parameter
    v.to_excel(writer, sheet_name=f"DATA_{cust}_{reg}",index=False)
writer.save()

另一个想法是在 groupby:

之前更改列名称

#if columns name has `Unnamed` replace by empty string
#df.columns = ['' if 'Unnamed' in x else x for x in df.columns]
#if columnshas missing values replace them to empty string
df.columns = df.columns.to_series().fillna('')

writer = pd.ExcelWriter('duck_data.xlsx',engine='xlsxwriter')
for (cust,reg), v in df.groupby(['cust','region']):
    #removed columns parameter
    v.to_excel(writer, sheet_name=f"DATA_{cust}_{reg}",index=False)
writer.save()

KeyError: "Not all names specified in 'columns' are found"

KeyError: "Not all names specified in 'columns' are found"

python

dataframe

pandas

openpyxl

pandas.excelwriter