🌐 Mailman 3 October 2021 - Tutor - python.org

Scripting Calligra sheets with Python
by Jim Byrnes Jan. 31, 2022

Jan. 31, 2022

I am trying to script Calligra Sheets (formerly KSpread) with python. I have gotten some of the included example scripts to run so I know python scripting is running. I found the following snippet on their website: import KSpread sheet = KSpread.view().sheet() # swap text of B5 and C6 t1 = sheet.text("B5") t2 = sheet.text(6,3) sheet.setText("B5", t2) sheet.setText(6, 3, t1) # swap value of D7 and E8 v1 = sheet.value("D7") v2 = sheet.value(8,5) sheet.setValue("D7", v2) sheet.setValue(8, 5, v1) Error: 'str' object has no attribute 'text' File "file:///usr/share/kde4/apps/sheets/scripts/extensions/myswap.py", line 4, in <module> This error message appeared in a dialog box. I've taught myself some Python but I don't understand what is happening here. Shouldn't t1 be a sheet object? What would cause it to be a str instead? Thanks, Jim

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Creating a two dimension set
by Phil Nov. 8, 2021

Nov. 8, 2021

As an example, if I wanted to create a two dimension list I would write: num_rows = 9 num_cols = 9 self.solution = [[None] * num_cols for _ in range(num_rows)] In my current creation I need a two dimension set and so I have used, again for example: result = set(self.solution[row][col]) - 3 However, my code has grown and I find that I'm making mistakes and it would be much simpler if I'd created a two dimension set in the first place rather that converting the list to a set every time I need to access it. I could, I suppose, use two for loops to create and initialise the set but there must be a simpler and less tedious way. I have very poor Internet access at the moment and searching for an answer hasn't been fruitful due to frequent disconnections. All that I've gained is a headache. -- Regards, Phil

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New to Python Programming Language.
by Kaushal Shriyan Oct. 30, 2021

Oct. 30, 2021

Hi All, I am new to Python programming language without any programming experience. Please guide and suggest me to start learning it. I am very much eager to learn and will dedicate every day to understand it. I look forward to hearing from you. Thanks in advance. Best regards, Kaushal

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OT: Windoze via MacOS - Looking for some Off-list assistance
by Alan Gauld Oct. 30, 2021

Oct. 30, 2021

Apologies for a very tenuously linked request. It's upgrade time as my current Windoze PC is beginning to struggle. I only really use it for 3 things: 1) Editing Photos 2) Editing Videos 3) writing books for commercial publication. (Which includes running Python and C/C++ dev environments - see, there is a link! :-) That gives me lots of options since all the programs I use for these things can run on Windows or MacOSX. So should I just buy a new Windows box? Or migrate to a new M1 powered Mac mini? The motivation to migrate comes from getting both my everyday and "media" PCs based on *nix. The advantage of staying on Windows is that it is still the majority option for readers of my books. If anyone has objective experience of **both systems** (no fanboys or Linux evangelists(*) please!) and is willing to answer a few questions I have and share experiences off-list I'd appreciate it. Also if anyone knows a non-partisan forum fr discussing such things I'd love to know. Most of the ones I've seen advocate vigorously for one or the other... (*)Nothing against Linux; it's my main system but opensource apps just don't come close for serious photo or video work and my publishers insist on Microsoft tools(and yes, I could use wine, but not for the other options). Apologies again for the OT theme. -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos

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PYTHON INSTALLATION PROBLEM
by Jose Rivera Oct. 30, 2021

Oct. 30, 2021

Hello, I just downloaded the latest version of python to my Mac book but when I click on the python launcher on my dock is not opening. Have I done something wrong along the process of the installation? Please help. I am a new user and don’t know if I have done the installing properly. Thank you very much [cid:27A2F04F-F440-4399-BA72-4FB60E21A292] [cid:C128ED66-0362-4668-9393-1D0480998F05] Sincerely, Jose

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Re: [Tutor] PYTHON INSTALLATION PROBLEM
by Bryan O'Brien Oct. 30, 2021

Oct. 30, 2021

Likely, you have multiple Python executables on your system. This will necessitate modifying your PATH. In terminal, run: which -a python <enter> If multiple python versions exist (this is normal with MacOS), just ensure that the python you want to use is listed first in your path. grep -i path ~/.zshrc HTH > On Oct 29, 2021, at 22:00, Richard Damon <Richard(a)damon-family.org> wrote: > > On 10/29/21 8:08 PM, Cameron Simpson wrote: >>> On 29Oct2021 19:51, Richard Damon <Richard(a)Damon-Family.org> wrote: >>> On the Mac, 'Python Launcher' seems to just configure how python will >>> run programs run under python. Generally from the Dock, you will want >>> to click on the 'IDLE' icon, which launches the Python IDE, which gives >>> and editor to write python programs or load a python script. >>> The other way to run python is from the command line, using a command >>> like python3 myprog.py >> Also, Macs ship with Python. If your MacOS is current, the supplied >> Python should be pretty modern. >> Cheers, >> Cameron Simpson <cs(a)cskk.id.au> > > You might think that, but my Mac, running the latest version of OS-X, Monterey, reports for a "python --version" that the system default python is still 2.7.10 > > Now, this system is a 2019 Year model, but was built as a upgrade to an older system. so that might be a reason. > > Since I have been manually installing current Pythons, I don't know if they also have provided a python3 command with something more recent. > > -- > Richard Damon > > _______________________________________________ > Tutor maillist - Tutor(a)python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor

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Pass options in one line (Selenium)
by Julius Hamilton Oct. 28, 2021

Oct. 28, 2021

Hey, Would anyone know how to do the following in fewer lines? from selenium import webdriver from selenium.webdriver.firefox.options import Options options = Options() options.headless = True driver = webdriver.Firefox(options = options) Basically, I’d like to do this: driver = webdriver.Firefox(options = Options().headless = True) But the only issue is trying to instantiate a class, then modify a property, and passing that as the argument to something else, all at once. Maybe Options(self.headless = True)? Thanks very much, Julius

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Using formatted string
by Manprit Singh Oct. 28, 2021

Oct. 28, 2021

Dear Sir, Suppose i have to print a number using f string , with the only feature required that it should start with a + sign if it a positive number or a - sign if it is a negative number, the number can be an integer or a floating point number, Doing it in this way as shown in the examples below done by me is ok ? >>> a = -3.659 >>> b= -4 >>> c = 5 >>> d = 5.6 >>> f'{a:+}' '-3.659' >>> f'{b:+}' '-4' >>> f'{c:+}' '+5' >>> f'{d:+}' '+5.6' >>> In the above examples, I have not written type characters (for example f for float and d for int) after : . Need your comments. Regards Manprit Singh

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tkinter listbox function
by Ed Connell Oct. 26, 2021

Oct. 26, 2021

Hi again, HELP!!! I really, really, really want to know how to implement this function using a Tkinter Lisbox. def pickFromListTK( listOfChoices ): --- some code using a Listbo: --- return choice The nonGUI version is simple, but I can't figure out the GUI version. Thank you so much. -- I have a right and a left brain, but there is nothing right in the left one and there is nothing left in the right one!

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Simple curses application
by Julius Hamilton Oct. 25, 2021

Oct. 25, 2021

Hey, Here’s my attempt at some pseudocode, with a few questions about it: import curses import json # load previous application data data = open(“dr.dat”).json() # ? # Data is a list of dictionaries. Each text name is a key. The value is three more dictionaries. The first is the text. The second is {index: } - the location in the text where the reader left off. The second is {comments: “”} - a text file. So, data = [{“TheBible”: [{text: “text of bible”}, {index: 0}, {comments: “”}]}] You can launch the app with or without a command line argument - a filename - which imports a new text into the data. The index starts at 0 for new texts. $ dr newtext textname = $1 if textname != “”: data.add({textname: [{text: open(textname).read()}, {index: 0}, {comments: “”}]}]. else: # show a menu of imported texts with curses. The user can navigate up and down with Vim keys: j and k, and choose one with “enter”. What’s a good way to do that with curses? Or a different library? scr = curses.initscr() # … Assuming they select one: text = data[selection[text]] index = data[selection[index]] comments = data[selection[comments]] lines = text.splitlines() scr.addstr(line[index]) curses.refresh() # How do I listen for user key presses “l” and “h”, left and right after Vim? l puts the index up one and refreshes the screen, h the index down one. c allows a the user to type into a text box on screen, beneath the line. When they press enter, it’s appended as a new line to the “comments” file. q rewrites the data to the data file and closes the curses viewer. Could anyone please correct my code and fill in these blank details? I’d really appreciate it. Thanks very much, Julius

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