使用pandas组合/合并2个不同的Excel文件/工作表

2024-04-26 12:56:59 发布

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我正在尝试合并两个不同的Excel文件。(感谢帖子Import multiple excel files into python pandas and concatenate them into one dataframe

到目前为止,我得出的结论是:

import os
import pandas as pd

df = pd.DataFrame()

for f in ['c:\\file1.xls', 'c:\\ file2.xls']:
    data = pd.read_excel(f, 'Sheet1')
    df = df.append(data)

df.to_excel("c:\\all.xls")

这是它们的样子。

enter image description here

但是我想:

  1. 排除每个文件的最后一行(即File1.xls中的row4和row5;File2.xls中的row7和row8)。
  2. 添加列(或覆盖列a)以指示数据来自何处。

例如:

enter image description here

有可能吗?谢谢。


Tags: and文件importpandasdfdatafilesmultiple
2条回答
import os
import os.path
import xlrd
import xlsxwriter

file_name = input("Decide the destination file name in DOUBLE QUOTES: ")
merged_file_name = file_name + ".xlsx"
dest_book = xlsxwriter.Workbook(merged_file_name)
dest_sheet_1 = dest_book.add_worksheet()
dest_row = 1
temp = 0
path = input("Enter the path in DOUBLE QUOTES: ")
for root,dirs,files in os.walk(path):
    files = [ _ for _ in files if _.endswith('.xlsx') ]
    for xlsfile in files:
        print ("File in mentioned folder is: " + xlsfile)
        temp_book = xlrd.open_workbook(os.path.join(root,xlsfile))
        temp_sheet = temp_book.sheet_by_index(0)
        if temp == 0:
            for col_index in range(temp_sheet.ncols):
                str = temp_sheet.cell_value(0, col_index)
                dest_sheet_1.write(0, col_index, str)
            temp = temp + 1
        for row_index in range(1, temp_sheet.nrows):
            for col_index in range(temp_sheet.ncols):
                str = temp_sheet.cell_value(row_index, col_index)
                dest_sheet_1.write(dest_row, col_index, str)
            dest_row = dest_row + 1
dest_book.close()
book = xlrd.open_workbook(merged_file_name)
sheet = book.sheet_by_index(0)
print "number of rows in destination file are: ", sheet.nrows
print "number of columns in destination file are: ", sheet.ncols

对于num.1,可以指定skip_footer,如here所述;或者,也可以指定

data = data.iloc[:-2]

一旦你读了数据。

对于数字2,您可以:

from os.path import basename
data.index = [basename(f)] * len(data)

另外,最好将所有的数据帧放在一个列表中,然后concat它们放在最后;例如:

df = []
for f in ['c:\\file1.xls', 'c:\\ file2.xls']:
    data = pd.read_excel(f, 'Sheet1').iloc[:-2]
    data.index = [os.path.basename(f)] * len(data)
    df.append(data)

df = pd.concat(df)

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