I want to deliver an EXCEL application and I'm finding out whether I can password protect a whole work book with Python and XLRD libray? Does any one around know how I can do this with the XLRD on python?
As the README says, in the "Outside the current scope" section:
Unlikely to be done:
Handling password-protected (encrypted) files.
On top of that, note that xlrd is only for reading data from Excel files, not generating or modifying them (xlwt does that). So, even if it were possible, xlrd wouldn't be the way to do it.
Related
I'm currently implementing a tool to automise parts of my daily work. Therefore I need to create a python tool which creates an excel-file (workbook) with several informations and encrypts the sheets of the file.
The first part which creates the file and fills it with the data works perfectly.
But the encryption doesn't work at all.
I'm using win32com, win32com.client and openpyxl. The workbook hast two different sheets, named "1" and "2".
My Workbook:
import win32com.client
import os, sys, win32com, os.path, time
excel = win32com.client.Dispatch("Excel.Application")
excel.Visible = True
workbook = excel.Workbooks.Open(reading_path) ####this is the path where the file is stored
sheet = workbook.Worksheets(1)
So I searched through other topics and got the following:
import openpyxl
sheet.protection.set_password('test')
sheet.save(saving_path)
Unfortunately this doesn't work... My shell response an AttributeError. In Detail:
AttributeError: <unknown>.set_password
Does someone knows another way how to encrypt just the pages in excel with python?
Thanks a lot for your help!
It is not entirely clear what you mean by "encrypting the sheet" as the openpyxl code you refer to has nothing to do with encryption; see the warning in the documentation. Excel does support encryption of entire workbooks though, but that appears to be different from what you want.
In any case, your code fails because the sheet you get from win32com is a wildly different beast than what openpyxl expects. For example, sheet being based on COM requires an Excel process to run for manipulation to be possible, while openpyxl does not even require Excel to be available on the host machine.
Now in your particular case, you do not actually need openpyxl (although you might find that using it over win32com has plenty of benefits), and you could stay entirely within COM. As such, adding password protection is possible through Worksheet.Protect which in your case would boil down to simply running
sheet.Protect('test')
I am trying to set password for xlsx file. I use xlsxwriter to package for now to generate the csv file. However, didn't reach any information to set password for the csv file.
I found similar question here. But the openpyxl isn't the package I might gonna to use.
Do anyone know hot to simply set password for xlsx file?
Thanks in advance.
CSV files are plain text - there's no such thing as adding a password.
openpyxl is a package to handle excel files - which aren't csv, so it's not relevant
I create new workbooks via xlsxwriter. In every of them I need to have formated header sheet, which is stored in another template workbook. I know it is impossible to do with xlsxwriter, coz I cannot open template workbook with this.
I thought to do that by xlrd, copy this sheet and then with xlsxwriter write it to created workbook.
But is it possible? To use combination of those two libraries?
I know this question is without even any code, but I'm lame with python and if you could give me any advice or something to deal with my problem I will be gratefull.
xlrd and xlswriter aren't really designed to work together. Consider switching to the pyopenxl library, which allows both reading and writing of spreadsheets and might allow you to do what you need quite easily.
In the environment, we have an excel file, which includes rawdata in one sheet and pivot table and charts in another sheet.
I need to append rows every day to raw data automatically using a python job.
I am not sure, but there may be some VB Script running on the front end which will refresh the pivot tables.
I used openpyxl and by following its online documentation, I was able to append rows and save the workbook. I used keep_vba=true while loading the workbook to keep the VBA modules inside to enable pivoting. But after saving the workbook, the xlsx is not being opened anymore using MS office and saying the format or the extension is not valid. I can see the data using python but with office, its not working anymore. If I don't use keep_vba=true, then pivoting is not working, only the previous values are present (ofcourse as I understood, as VBA script is needed for pivoting).
Could you explain me what's happening? I am new to python and don't know its concepts much.
How can I fix this in openpyxl or is there any better alternative other than openpyxl. Data connections in MS office is not an option for me.
As I understood, xlsx may need special modules to save the VB script to save in the same way as it may be saved using MS office. If it is, then what is the purpose of keep_vba=true ?
I would be grateful if you could explain in more detail. I would love to know.
As I have very short time to complete this task, I am looking for a quick answer here, instead of going through all the concepts.
Thankyou!
You have to save the files with the extension ".xlsm" rather than ".xlsx". The .xlsx format exists specifically to provide the user with assurance that there is no VBA code within the file. This is an Excel standard and not a problem with openpyxl. With that said, I haven't worked with openpyxl, so I'm not sure what you need to do to be sure your files are properly converted to .xlsm.
Edit: Sorry, misread your question first time around. Easiest step would be to set keep_vba=False. That might resolve your issue right there, since you're telling openpyxl to look for VBA code that can't possibly exist in an xlsx file. Hard to say more than that until you post the relevant section of your code.
I created a little script in python to generate an excel compatible xml file (saved with xls extension). The file is generated from a part database so I can place an order with the extracted data.
On the website for ordering the parts, you can import the excel file so the order fills automatically. The problem here is that each time I want to make an order, I have to open excel and save the file with xls extension of type MS Excel 97-2003 to get the import working.
The excel document then looks exactly the same, but when opened with notepad, we cannot see the xml anymore, only binary dump.
Is there a way to automate this process, by running a bat file or maybe adding some line to my python script so it is converted in the proper format?
(I know that question has been asked before, but it never has been answered)
There are two basic approaches to this.
You asked about the first: Automating Excel to open and save the file. There are in fact two ways to do that. The second is to use Python tools that can create the file directly in Python without Excel's help. So:
1a: Automating Excel through its automation interface.
Excel is designed to be controlled by external apps, through COM automation. Python has a great COM-automation interface inside of pywin32. Unfortunately, the documentation on pywin32 is not that great, and all of the documentation on Excel's COM automation interface is written for JScript, VB, .NET, or raw COM in C. Fortunately, there are a number of questions on this site about using win32com to drive Excel, such as this one, so you can probably figure it out yourself. It would look something like this:
import win32com.client
excel = win32com.client.Dispatch('Excel.Application')
spreadsheet = excel.Workbooks.Open('C:/path/to/spreadsheet.xml')
spreadsheet.SaveAs('C:/path/to/spreadsheet.xls', fileformat=excel.xlExcel8)
That isn't tested in any way, because I don't have a Windows box with Excel handy. And I vaguely remember having problems getting access to the fileformat names from win32com and just punting and looking up the equivalent numbers (a quick google for "fileformat xlExcel8" shows that the numerical equivalent is 56, and confirms that's the right format for 97-2003 binary xls).
Of course if you don't need to do it in Python, MSDN is full of great examples in JScript, VBA, etc.
The documentation you need is all on MSDN (since the Office Developer Network for Excel was merged into MSDN, and then apparently became a 404 page). The top-level page for Excel is Welcome to the Excel 2013 developer reference (if you want a different version, click on "Office client development" in the navigation thingy above and pick a different version), and what you mostly care about is the Object model reference. You can also find the same documentation (often links to the exact same webpages) in Excel's built-in help. For example, that's where you find out that the Application object has a Workbooks property, which is a Workbooks object, which has Open and Add methods that return a Workbook object, which has a SaveAs method, which takes an optional FileFormat parameter of type XlFileFormat, which has a value xlExcel8 = 56.
As I implied earlier, you may not be able to access enumeration values like xlExcel8 for some reason which I no longer remember, but you can look the value up on MSDN (or just Google it) and put the number 56 instead.
The other documentation (both here and elsewhere within MSDN) is usually either stuff you can guess yourself, or stuff that isn't relevant from win32com. Unfortunately, the already-sparse win32com documentation expects you to have read that documentation—but fortunately, the examples are enough to muddle your way through almost everything but the object model.
1b: Automating Excel via its GUI.
Automating a GUI on Windows is a huge pain, but there are a number of tools that make it a whole lot easier, such as pywinauto. You may be able to just use swapy to write the pywinauto script for you.
If you don't need to do it in Python, separate scripting systems like AutoIt have an even larger user base and even more examples to make your life easier.
2: Doing it all in Python.
xlutils, part of python-excel, may be able to do what you want, without touching Excel at all.