🌐 Mailman 3 July 2023 - Tutor - python.org

Tkinter iconbitmap question
by Phil Aug. 5, 2023

Aug. 5, 2023

I'm playing with an example from ttkbootstrap and I'm having a problem with the iconbitmap function. I realise that .ico files are not compatible with Linux so I've chosen an xbm file instead but I still have the same error as follows: root = tb.Window(themename="superhero") # root = Tk() root.title("TTK Bootstrap! DateEntry") root.iconbitmap('wind.xbm') root.geometry('500x350') Traceback (most recent call last): File root.iconbitmap('wind.xbm') ^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "/usr/lib/python3.11/tkinter/__init__.py", line 2136, in wm_iconbitmap return self.tk.call('wm', 'iconbitmap', self._w, bitmap) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ _tkinter.TclError: bitmap "wind.xbm" not defined Wind.xbm is in the same virtual environment directory as the python file. I've searched the Internet for an answer and found the same question but no answers that makes much sense to me. It's not overly important. The desktop manager that I use doesn't have window icons, perhaps it's just an incompatibility problem? -- Regards, Phil

3 7

Tutoring help automating with python
by Fatima Mehak July 27, 2023

July 27, 2023

Hello, I've been getting errors when trying to run the below text file. I have indicated the error at the bottom for review. Can you please assist? #!/usr/bin/env python3 from PIL import Image import os, sys def resize_rename_rotate(srcfile, targetdir="", size=(128,128)): targetfile = os.path.splitext(srcfile)[0] extension = os.path.splitext(srcfile)[1] if srcfile != tgtfile: try : im = Image.open(srcfile) # open file im.rotate(90) # degrees counter-clockwise im.resize((128, 128)) # resize the file im.save(targetdir+targetfile+extension,"jpeg") except IOError: print ("cannot change image for ", srcfile) if __name__=="__main__": targetdir = "../output/" srcdir = "../input/" for file in os.listdir(srcdir): resize_rename_rotate(file,targetdir) #*Traceback (most recent call last): # File "/home/student-03-61dc276e6247/./fix_image.py", line 23, in <module> # for file in os.listdir(srcdir): #FileNotFoundError: [Errno 2] No such file or directory: '../input/'

5 4

Tutoring help automating with python
by Fatima Mehak July 26, 2023

July 26, 2023

Hello, I've been getting errors when trying to run the attached text file. I have indicated the error at the bottom of the text file for review. Can you please assist? There is also an instructions file in word format. -Fatima

2 1

Tungsten teaching method
by ThreeBlindQuarks July 26, 2023

July 26, 2023

I have been wondering about some of the newer python learners in terms of how they approach learning. This is not really about just python but all kinds of languages. Do you start with the basics as in the kinds of constructs many earlier programming languages have. I mean define basic types like integer, floating point and character/text. Teach how to do simple assignment statements, then IF statements (or even weirder GOTO) and loop constructs like WHILE or FOR or whatever, then learn how to create functions, perhaps make simple objects and maybe eventually how to treat functions as first class objects. In other words, do you teach loosely simple parts of procedural programming then perhaps introduce object oriented and functional and perhaps other methodologies, including teaching about assorted libraries/packages/modules that extend the language? I think some here have learned vaguely along these lines and some quite differently. Some skip learning much and just look at snippets of code, perhaps in internet searches and try to figure things out. Some would prefer to search for pre-built software, as in publicly shared modules, that already do 90% of what they want. So I decided to learn another language called WOLFRAM. I am not suggesting anyone here do so. I just am using it to illustrate some points. In a sense, this language is a successor to Mathematica and is a very high-level language that is hard to characterize. It comes with at least 6,000 functions built-in as in not needing to be imported. It is by Stephen Wolfram, hence the name that means Tungsten which is why the chemical symbol is W. The book is from 2015 and is called An Elementary Introduction to the Wolfram Language. What got me is that for an ELEMENTARY text, it skips all the elementary parts. It seems to practically jump into functional programming from the start and only about 2/3 of the way through the book is there a mention of a kind of IF statement. No real mention of loops as everything sort of had loops built-in one way or another. I still have not seen examples on how to setup a variable and assign to it or create a function other than an immediate inline (anonymous) function let alone how to create an object. I know it all has to be THERE but you can apparently do an amazing amount in this language by simply calling one of the many built-in functions appropriately, often in a nested fashion. So, no, not suggesting it as a first language. The point here is that we often have little idea about the person asking a question and their background. There can be a temptation to simply give them an answer, sometimes an elegant answer using advanced features. Several of us recently tried coaching someone to fix their code and work through learning how to solve a problem. Someone else just supplied working code. Now if someone asked Wolfram how to say determine if a number is prime, rather than suggesting some technique using an algorithm, they would just suggest using PrimeQ[number] and voila! (In that language, you use square brackets in function calls.) If they were then asked how to check a whole list of numbers that way, do you think they would show any visible loops? Nope. I will spare the details but in effect they would apply a function to a list returning the list of results. If you want just the ones that are prime, you can use a sort of embedded if statement. One-liners seem to be the norm. And perhaps odder, the language is merely a part of a larger entity that includes a gigantic knowledge base on the internet that it automatically taps into so your program can literally ask in plain English for things like the populations of countries embedded in a request to make some complex plot displaying them. Python though is actually many paradigms in one. You can actually do quite a bit similar to what I described if you focus on a combination of functional programming and some object-oriented programming and are a bit more verbose. But if you want to learn how computers work on a basic level and then get into higher abstractions, it is very good. Some of what I describe is in there if you know where to look. You can use plain loops, then as syntactic sugar you can use comprehensions or perhaps generators and of course you can use functional programming, including the kinds of tools you can get in the itertools module that automate lots of stuff for you. In this forum, I suspect that unless asked otherwise, we ought to remain in the lower levels. And I don’t mean the meaning of Elementary of someone like Stephen Wolfram! LOL!

4 5

looking but not finding
by o1bigtenor July 13, 2023

July 13, 2023

Greetings I am new to programming (although I've been using computers for quite a while) - - - have a project. Situation - have a fluid collection system - fluid system is on a load cell system want to not only weigh system say every 0.5 sec (I know that's slow in electronics) but I want to record that information (as well as other information around it). I've tried looking for data log software - - - not much luck so far except for commercial stuff. Tried looking to see if there were python libraries that could be manipulated into service - - - not finding much joy either - - - - is there such software out there - - libraries? (Running on linux if that makes a difference.) TIA

5 13

(no subject)
by hari ganivada July 13, 2023

July 13, 2023

Sir I am hari Ganivada. def is _power_off_two(number) number=2 while number ℅ 2==0: number = number/2 If number == 1: return true return False Call to the function print(is_power_of_two(0)) # should be False print(is_power_of_two(1))# should be true print(is_power_of_two(8))#should be true print(is_power_of_two(9))#should be false. Please help me sir

4 4

ModuleNotFoundError in Terminal, PyCharm OK
by trent shipley July 12, 2023

July 12, 2023

PyCharm can run the code below or process the marked line, #2, in the console, as in the snip, below, but I can't figure out how to feed the program command line args. import simple_hdroll_cli_parser as shdroll_cli from app.core import core_dice_roller as core ## problem here parse_cli_args = shdroll_cli.SimpleHDRollCliParser() kwargs = parse_cli_args.parse() if kwargs.add is not None: transform = core.add_currying(kwargs.add) elif kwargs.mult is not None: transform = core.multiply_currying(kwargs.mult) else: transform = None # Create a die die = core.IntegerDie(transform_fn=transform, sides=kwargs.sides, bottom=kwargs.base) ### continues ### No main ### END ### A terminal on Mint Cinnamon reliably does this: (venv) trent@trent-virtual-machine:~/pythonworkspace/hackable_dice_roller/app/cli/simple_cli$ python3 shdroll.py Traceback (most recent call last): File "/home/trent/pythonworkspace/hackable_dice_roller/app/cli/simple_cli/shdroll.py", line 2, in <module> from app.core import core_dice_roller as core ModuleNotFoundError: No module named 'app' Google has many answers for PyCharm can't find my module, but the command line can, but none for the other way around. And the files: . ├── app │ ├── cli │ │ ├── __init__.py │ │ ├── __pycache__ │ │ └── simple_cli │ │ ├── __init__.py │ │ ├── __pycache__ │ │ ├── shdroll.py │ │ └── simple_hdroll_cli_parser.py │ ├── core │ │ ├── core_dice_roller.py │ │ ├── __init__.py │ │ └── __pycache__ │ ├── gui │ │ ├── __init__.py │ │ └── simple_gui │ │ └── __init_.py │ ├── __init__.py │ ├── __pycache__ │ └── tests │ ├── cli │ │ ├── __init__.py │ │ └── simple_cli │ │ └── __init__.py │ ├── core │ │ ├── __init__.py │ │ ├── __pycache__ │ │ ├── test_hdr_core.py │ │ └── test_hdr_core_visually.py │ └── gui │ ├── __init__.py │ └── simple_gui │ └── __init__.py ├── __init__.py └── README 17 directories, 18 files

3 6

Python script (beginner)
by dcasher＠usnx.com July 11, 2023

July 11, 2023

Good afternoon, I am trying to run a script that converts jpegs to pdfs. I currently have installed the img2pdf command line tool. My script will still not execute. Any help will be greatly appreciated. I have a attched a snip of the output. Derrick Casher 601-956-4770 x227 www.usnx.com

2 1

async learning
by Leam Hall July 4, 2023

July 4, 2023

Until recently, I haven't had a lot of reason to do async stuff. Now I'm trying to figure it out, but I'm missing something. The commented out section is my attempt at async, but it runs slower than the non-async version. Thoughts? The parameters are: Python 3.9 or 3.10 Import from Standard Library only Later, add_stuff() will include running python processes to gather data Code so far: import asyncio import urllib.request site = "https://en.wikipedia.org/wiki/" def add_stuff(name, site): url = site + name result = dict() result['name'] = name.replace('_', ' ') result['details'] = urllib.request.urlopen(url).read() return result def show_stuff(thing): info = thing[1] name = info['name'] details = info['details'] result = "Let's look at {}, with {} bits and bytes of detail.".format(name, len(details)) return result #async def main(names): # team = { name: add_stuff(name, site) for name in names} # return team if __name__ == "__main__": names = ["Frodo_Baggins", "Samwise_Gamgee", "Merry_Brandybuck", "Pippin_Took"] #team = asyncio.run(main(names)) team = { name: add_stuff(name, site) for name in names} for t in sorted(team.items()): print(show_stuff(t)) -- Software Engineer (reuel.net/resume) Scribe: The Domici War (domiciwar.net) General Ne'er-do-well (github.com/LeamHall)

3 3