[英]How to write dataframe below an existing Excel Sheet with ignoring index column value?
[英]How to write dataframe below an existing Excel sheet without losing slicer of excel in pivot table sheet?
我正在使用 openpyxl 模块将 pandas 数据框附加到现有的 Excel 工作表下方。 但问题是我在数据透视表中的 excel 工作表切片器在执行此任务时被破坏了。 我尝试了很多方法来找到它的解决方案,但我认为 openpyxl 没有办法避免这种情况。
我正在使用以下方法来实现它与 openpyxl-
#HELPER FUNCTION TO APPEND DATAFRAME BELOW EXCEL FILE
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
import pandas as pd
# ignore [engine] parameter if it was passed
if 'engine' in to_excel_kwargs:
to_excel_kwargs.pop('engine')
writer = pd.ExcelWriter(filename, engine='openpyxl', index=False)
# Python 2.x: define [FileNotFoundError] exception if it doesn't exist
try:
FileNotFoundError
except NameError:
FileNotFoundError = IOError
try:
# try to open an existing workbook
writer.book = load_workbook(filename,data_only=True)
# 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 = 1
# write out the new sheet
df.to_excel(writer, sheet_name, startrow=startrow, **to_excel_kwargs)
# save the workbook
writer.save()
我已经看到 xlwings 和 win32com 可以做到这一点,但不确定如何使用这些库来做到这一点。 我想问一下如何在现有的 excel 文件下附加数据框而不丢失我的 excel 数据透视表中的切片器我们可以在不使用 openpyxl 的情况下完成它的方式,因为我认为 openpyxl 没有可用的方法。 我收到 openpyxl 警告
C:\Users\Desktop\PycharmProjects\MyProject\venv\lib\site-packages\openpyxl\worksheet\_reader.py:292: UserWarning: Slicer List extension is not supported and will be removed
warn(msg)
我已经尝试了所有可能的解决方案,最后我可以说 openpyxl 是不可能的。 作为 xlwings 的替代,我们可以使用 openpyxl 库。xlwings 库的处理速度非常快。 我们可以在以下代码的帮助下将数据框附加到 Excel 表格下方。通过这种方式,切片器值不会丢失或删除。
import xlwings as xw
import pandas as pd
df = pd.read_excel("File_to_append.xlsx")
wb = xw.Book(r"Existing_Excel.xlsx")
ws = wb.sheets('Sheet1') #Name of sheet where to append df
ws.cells(cell_row_number,cell_column_number).options(index=False, header=False).value = df
#Here cell_row_number and cell_column_number are integer valuesof row number and column number to append data
希望我很清楚。这是我找到的最好的解决方案
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