Python Combine Multiple Excel Sheets

Summary

  1. Combine Python Lists
  2. Python Combine Set
  3. Python Combine Multiple Excel Sheets Into One
  4. Python Combine Multiple Excel Files Into One

Here are the steps to combine multiple worksheets with Excel Tables using Power Query: Go to the Data tab. In the Get & Transform Data group, click on the ‘Get Data’ option. Go the ‘From Other Sources’ option. Click the ‘Blank Query’ option. This will open the Power Query editor. Understanding readexcel. The readexcel function is a feature packed pandas function. For this specific case, we can use the sheetname parameter to streamline the reading in of all the sheets in our Excel file. Most of the time, you will read in a specific sheet from an Excel file.

Prerequisite: Create and Write on an excel sheet. XlsxWriter is a Python library using which one can perform multiple operations on excel files like creating, writing, arithmetic operations and plotting graphs. Let’s see how to plot Combined charts using realtime data. I am trying to combine 2 different Excel files. (thanks to the post Import multiple excel files into python pandas and concatenate them into one dataframe) The one I work out so far is: import os.

Reading multiple sheet Excel workbooks into SPSS is easily done with this Custom Dialog. This tutorial demonstrates how to use it.

Before You Start

SPSS Read and Merge Excel Files Tool
  • Make sure you have the SPSS Python Essentials installed.
  • Download and install the xlrd module.
  • If you'd like to generate some test data as done in the syntax example, you'll need the xlwt module as well.
  • Download and install Excel to SPSS Tool. Note that this is an SPSS custom dialog. You'll now find Read and Merge Excel Files under Utilities.
  • Close all datasets in SPSS.

SPSS Syntax Example for Generating Test Data

PythonCombine
* Create some small Excel workbooks for testing.

begin program.
rdir=r'd:temp' # Specify folder for writing test files.
import xlwt,random,datetime,os
fmt = xlwt.easyxf(num_format_str='M/D/YY')
wBooks = ['book_' + str(cnt) for cnt in range(1,5)]
for noSheets,wBook in enumerate(wBooks):
wb=xlwt.Workbook()
for sheetNo in range(noSheets + 1):
ws=wb.add_sheet('sheet_%d'%(sheetNo + 1))
for col,cont in enumerate(['date','ID','JobTitle','Revenue']):
ws.write(0,col,cont)
for row in range(1,6):
ws.write(row,0,datetime.datetime(2008 + sheetNo,1,1) + datetime.timedelta(days=random.randrange(1,365)),fmt)
ws.write(row,1,random.choice([None,104,21,60,2,1030]))
ws.write(row,2,random.choice([None,'Developer','Tester','Manager']))
ws.write(row,3,random.randrange(40,80)*1000)
wb.save(os.path.join(rdir,wBook + '.xls'))
end program.

Reading All Data Into SPSS

Since we created our test data in d:temp, this folder will hold the Excel files. We can simply copy-paste this into the dialog. Other than that, we don't have to change anything. The first row holds the variable names and we'd like all sheets from all workbooks to be read.
Multiple

Description

Python Combine Multiple Excel Sheets
  • By default, the program will read in all .xls files in a folder specified by the user.
  • By default, all data from all sheets will be imported. The default of all sheets can be overridden by specifying one or more sheets (see below).
  • In order for this to make sense, all sheets in all workbooks are assumed to have similar formats (numbers of columns, column contents).
  • By default, it is assumed that the first row of each sheet contains column names. If these conflict, the column names of the last sheet of the last workbook that's read will be used. If no column names are present, column_1, column_2 and so on will be used as variable names in SPSS.

Converting Date Variables

Date variables in the Excel files are not automatically converted to SPSS date variables. After reading in the data, they can be converted with the syntax below.
* Convert 'date' to date format.

compute date=datesum(date.dmy(30,12,1899),date,'days').
format date(edate10).
exe.

Combine Python Lists

What if I Don't Want All Sheets to be Read?

Python Combine Set

  • In this case, the desired sheets can be specified. Note that the first sheet is referenced by 1 (rather than 0).
  • If two or more sheets are to be read, separate them with commas.
  • If sheets that are specified do not exist in one or more workbooks, the command will not run. An error message will indicate the first workbook where this occurred.

Python Combine Multiple Excel Sheets Into One

What if I Don't Want All Workbooks to be Read?

Read all excel sheets in python

Python Combine Multiple Excel Files Into One

This default can not be overridden. A workaround may be to move irrelevant workbooks to a different folder.