🌐 Mailman 3 December 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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Break element into list while iterating
by Julius Hamilton Jan. 11, 2022

Jan. 11, 2022

Hey, I would like to do some kind of list comprehension where elements meeting certain conditions get split on a delimiter. They don’t become lists nested in one element in the previous list; the new elements just get inserted where the old one was. Like this: [“apple”, “pear”] -> [“a”, “p”, “p”, “l”, “e”, “pear”] Is there a list comprehension syntax where if I split an element with e.split(), I can “insert” those elements at the element they came from? Thanks very much, Julius

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Segmenting bash help docs
by Julius Hamilton Dec. 26, 2021

Dec. 26, 2021

Hey, I am pretty close to pulling this off and I thought I’d reach out to fill in a few gaps. I can imagine writing a Bash function which takes the help page and displays it sentence by sentence. If we consider code for doing this step by step: $ help wait > wait.txt $ python3 >>> import spacy, requests >>> f = open(“wait.txt”).read() >>> sen = spacy.load(“en_core_web_sm”)(f) The sentences are pretty well segmented. There is a thread that fascinates me about separating on an even more fine-grained level ( https://stackoverflow.com/questions/65227103/clause-extraction-long-sentenc…), but I won’t venture there yet. What I can do is first split the current list on any newline regions greater than one newline. >>> sen = [s.text.strip() for s in sen] Then I can compress broken sentences into single lines by replacing extended whitespace with a single whitespace: >>> sen = [re.sub(“[\s]+”, “ “, s) for s in sen] Not sure if anybody has any opinions on this, or ways they’d improve it. It’d be cool to find a single simple, elegant way to clean, strip and conjoin the sentences/lines in one line of code, and also not to use the “re” module if not necessary. Thanks, Julius

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(no subject)
by James Chambliss Dec. 25, 2021

Dec. 25, 2021

Need help understanding how to use class decorated......

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method could be a function warning
by Phil Dec. 23, 2021

Dec. 23, 2021

I've been in the habit of mixing methods and functions within the GUI class and to get the functions to work I've had to prefix the call to the function with .self and add self as a function argument. The function dummy in the following code is an an example of this. It makes more sense to me, and I think it's correct, to define and call the functions outside the GUI class as I've done with my_function below. Also, I'm thinking that the GUI class should be in a file of it's own because the total number of lines of code exceeds 500 thus making scrolling tedious. I ask because I'm in the process of tidying up a Conway's Game of Life project that I wrote 3 years ago. import tkinter as tk class Root(tk.Tk): def __init__(self): super().__init__() self.title('test') self.geometry('300x300') self.frame = tk.Frame() self.dummy() def dummy(self): print('hello') def my_function(): print('my function') my_function() if __name__ == '__main__': root = Root() root.mainloop() -- Regards, Phil

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I need help please
by Henry Mfaume Dec. 17, 2021

Dec. 17, 2021

HI There. i installed anaconda on my pc, and through anaconda installed python, pandas and other programs. i created an environment, but if i want to import from the environment i created, i get the module not found error. someone please help me. Thank you. Henry.

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Packaging questions
by Julius Hamilton Dec. 15, 2021

Dec. 15, 2021

Hey, I just went through the pip packaging tutorial. It seemed to be mainly for making importable modules, i.e. files of functions you can access via import library I was hoping to package a command line application that can be used by invoking its name on the command line. The tutorial had me (basically) make an outermost project directory and put the actual project code in a subdirectory, “src”, and specify that was the “root” directory in the config file. As far as I could tell, the only other essential file was either a “setup.cfg” file or a “setup.py” file, (and a blank “__init__” file in src as well). Could anyone let me know why I would choose the one over the other, and if some people choose to have both? Which information in the config file is mandatory? I entered name, description, long_description, project_urls, license and much else. What’s the bare minimum possible? What should I do if I want my pip installation to be a command line application instead of an importable library of functions? Do I need a more sophisticated setup.py file which installs an executable in usr/bin or something? Thanks very much, Julius

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Tkinter frame background colour
by Phil Dec. 14, 2021

Dec. 14, 2021

My original GUI worked but it was a bit of a mess so I've spent most of the day building a new interface to my sudoku solver. However, there is one problem. I used to have a red line after the third and sixth column of boxes, the same with the rows. I achieved this by setting the frame's background to red and placing some padding after the third and sixth group of cells so that the red background would show through and show a red line between the 3 x 3 boxes. Otherwise, I'm happy with the result. import tkinter as tk class Root(tk.Tk): def __init__(self): super().__init__() self.title('Sudoku Solver') self.geometry('300x300') self.frame = tk.Frame() self.frame.pack(expand=True) self.frame.bg="red" self.entry = [None] * 81 for i in range(81): r, c = divmod(i, 9) self.entry[i] = tk.Entry(self.frame, width=2, justify=tk.CENTER, fg="red") #if i == i % 3: pad_x = (4, 0) self.entry[i].grid(row=r, column=c, padx=pad_x) self.control_frame = tk.Frame() self.control_frame.pack(side=tk.TOP, pady=5) self.b_quit = tk.Button(self.control_frame, text='Quit', command=self.quit) self.b_quit.pack(side=tk.LEFT) self.b_solve = tk.Button(self.control_frame, text='Solve', command=self.solve) self.b_solve.pack(side=tk.RIGHT) def quit(self): self.destroy() def solve(self): self.entry[2].insert(0, '9') print(self.entry[2].get()) if __name__ == '__main__': root = Root() root.mainloop() -- Regards, Phil

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File I/O Help please!!
by Marise Miville Dec. 13, 2021

Dec. 13, 2021

[image: Tutor help 1.png] [image: image.png] I am very new at this and I am trying to write 2 short programs. *Program 1: Prepare a list of the primes less than 1500. Save them in binary form to a file named 'SmallPrimes.dat'* *Program 2: Open the file 'SmallPrimes.dat' and read them into a list. Print them 5 at a time until the list is exhausted.* This is how far I could get without success. What am I doing wrong? Can anyone help me correct my codes? Thank you everyone!!! MM

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class attributes
by Alex Kleider Dec. 13, 2021

Dec. 13, 2021

I'm trying to write a __repr__ method that can be easily changed to show only the attributes in which I'm currently interested and want to be able to easily change the attributes of interest. My attempted solution is as follows: def __repr__(self): attrs = ['SECRETARY', # an easy to modify listing 'PATTERN', # of attributes of interest ] ret = [] for attr in attrs: if hasattr(self, attr): ret.append("{}::{}".format(attr, self.attr)) else: ret.append("{}::unassigned".format(attr)) return ','.join(ret) Not surprisingly, I get the following error: """ ret.append("{}::{}".format(attr, self.attr)) AttributeError: 'Club' object has no attribute 'attr' """ I'd be grateful if anyone could suggest a way to get around the problem. The built in method 'hasattr' is able to do the introspection necessary to do its work so it seems what I want should be "doable". Thanks in advance, Alex

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