我想将数据框保存到文件的第二张,但我不能这样做而且我不知道为什么。
yfile = openpyxl.load_workbook(new_file, data_only=True)
ws = yfile.worksheets[0]
sheet2 = yfile.create_sheet()
ws2 = yfile.get_sheet_by_name("Sheet").title = "Analysis"
writer = pd.ExcelWriter(yfile, engine='xlsxwriter')
df3.to_excel(writer, sheet_name='Analysis')
writer.save()
yfile.save(new_file)
我创建了表格'分析'但是当我保存在其中时,我收到了以下回复:"属性错误:'工作簿'对象没有属性'写'"
我需要修改什么?
答案 0 :(得分:4)
使用以下辅助函数:
def append_df_to_excel(filename, df, sheet_name='Sheet1', startrow=None,
truncate_sheet=False,
**to_excel_kwargs):
"""
Append a DataFrame [df] to existing Excel file [filename]
into [sheet_name] Sheet.
If [filename] doesn't exist, then this function will create it.
Parameters:
filename : File path or existing ExcelWriter
(Example: '/path/to/file.xlsx')
df : dataframe to save to workbook
sheet_name : Name of sheet which will contain DataFrame.
(default: 'Sheet1')
startrow : upper left cell row to dump data frame.
Per default (startrow=None) calculate the last row
in the existing DF and write to the next row...
truncate_sheet : truncate (remove and recreate) [sheet_name]
before writing DataFrame to Excel file
to_excel_kwargs : arguments which will be passed to `DataFrame.to_excel()`
[can be dictionary]
Returns: None
"""
from openpyxl import load_workbook
# ignore [engine] parameter if it was passed
if 'engine' in to_excel_kwargs:
to_excel_kwargs.pop('engine')
writer = pd.ExcelWriter(filename, engine='openpyxl')
try:
# try to open an existing workbook
writer.book = load_workbook(filename)
# get the last row in the existing Excel sheet
# if it was not specified explicitly
if startrow is None and sheet_name in writer.book.sheetnames:
startrow = writer.book[sheet_name].max_row
# truncate sheet
if truncate_sheet and sheet_name in writer.book.sheetnames:
# index of [sheet_name] sheet
idx = writer.book.sheetnames.index(sheet_name)
# remove [sheet_name]
writer.book.remove(writer.book.worksheets[idx])
# create an empty sheet [sheet_name] using old index
writer.book.create_sheet(sheet_name, idx)
# copy existing sheets
writer.sheets = {ws.title:ws for ws in writer.book.worksheets}
except FileNotFoundError:
# file does not exist yet, we will create it
pass
if startrow is None:
startrow = 0
# write out the new sheet
df.to_excel(writer, sheet_name, startrow=startrow, **to_excel_kwargs)
# save the workbook
writer.save()
注意:适用于Pandas< 0.21.0,将sheet_name
替换为sheetname
!
演示:
In [127]: df = pd.DataFrame(np.random.rand(5, 3), columns=list('abc'))
In [128]: df
Out[128]:
a b c
0 0.597353 0.770586 0.671231
1 0.628605 0.161283 0.397493
2 0.476206 0.701582 0.476809
3 0.045590 0.302834 0.857033
4 0.414820 0.478016 0.563258
In [129]: df.to_excel(filename)
In [130]: append_df_to_excel(filename, df, sheet_name="Sheet2", startrow=1, startcol=1)
In [131]: append_df_to_excel(filename, df, sheet_name="Sheet3", index=False)
In [132]: append_df_to_excel(filename, df, sheet_name="Sheet1", startcol=2, index=False)
结果:
Sheet 1中:
Sheet 2中:
表Sheet 3:
使用以下版本测试PS:
答案 1 :(得分:0)
您可以使用以下方式。 它将数据帧逐行写入excel文件。
from openpyxl.utils.dataframe import dataframe_to_rows
filename = r'some_file.xlsx'
df = some_dataframe
wb = load_workbook(filename)
if 'sh2' in wb.sheetnames:#to check whether sheet you need already exists
ws = wb['sh2']
else:
ws = wb.active
for r in dataframe_to_rows(df, index=False, header=True):
ws.append(r)
wb.save(filename)