🌐 Mailman 3 August 2019 - 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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The Reading Documentation problem
by Mike Barnett Sept. 11, 2019

Sept. 11, 2019

I've noted what I find to be a disturbing trend with younger students that use a package that I released last year. This package has a LOT of documentation, and it's needed because there are a lot of different classes, functions, etc. It's really easy reading and you don't have to read the docs except when you run into trouble or something new about it that you're learning. It's not a difficult package to learn and use, even with little reading. There are a lot of materials supplied along with the User Manual... a Cookbook, a lot of demo programs. The trend I see is an unwillingness to do a search through the documentation when there's a problem and instead of "researching" their problem some of these youngsters post, or blast post across multiple sites, a request for help. Often the information could have been found by searching online documentation much quicker and with a LOT less work than typing up a Stack Overflow post. Reading the documentation is an essential skill to grow knowledge. I get googling for help. I do it from time to time too. But when there's documentation available, you can't go wrong generally speaking by looking at it. When I learned Computer Science I had no choice. There was no internet. I remember when 2 foot long groups of manuals were placed on tables for easy access in computer labs in universities I attended. I feel like it made me a better programmer. I would like to request that teachers really drill in the importance of reading documentation, and while on the topic, writing documentation is super-important too. I understand the super-fast-pace of learning and doing that we're going through in technology, and the desire for instant learning or instant answers. I get that there are some great resources on the net. But they shouldn't be used in place of the written word, published often by the developers of the code. The problem with getting info online from Reddit, Stack Overflow, forums, is that sometimes, or for my not yet well-known package, all the time, the information is wrong. Reddit in particular is scary as I watch person after person respond to questions when they don't know much or anything about the topic. It's as if answering first gets them something. I dunno if it's an ego thing or what. I just know what I see and what I see time and time again are people without actual education and knowledge answering questions with the authority & confidence of someone that does know the topic. It's nearly impossible sometimes to tell the difference between someone completely guessing and someone highly educated just by reading the text posted. Sorry this is so long, but it's a real problem I'm witnessing and I'm wondering if it's only a certain portion of the programming world (self-taught people) or the internet-generation in general does this regardless of educational training. Thank you for your time

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Comment
by Olsen, Avalow Y Sept. 11, 2019

Sept. 11, 2019

Hi, Is there a mechanism to comment out large blocks of Python code? So far, the only ways I can see of commenting out code are to either start every line with a #, or to enclose the code in triple quotes. Thank you in advance! Ava ________________________________ This e-mail and any files transmitted with it are confidential and are intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient or the individual responsible for delivering the e-mail to the intended recipient, please be advised that you have received this e-mail in error and that any use, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you have received this communication in error, please return it to the sender immediately and delete the original message and any copy of it from your computer system. If you have any questions concerning this message, please contact the sender. Disclaimer R001.0

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Simple python help needed
by Cheyne Skapyak Aug. 31, 2019

Aug. 31, 2019

Hello, so i'm trying to modify some code so that basically i can choose what difficulty of guess the number i want to play. I'm trying to use def but it keeps coming back saying they aren't defined which i think they are, i cant seem to find a solution. here is the code Thank you import random import time print ('Welcome!') print() print ('************MAIN MENU************') print() time.sleep(.5) print ('Would you like to play the Easy, Medium, or Hard game mode?') print() choice = input(''' A: Easy Game Mode B: Medium Game Mode C: Hard Game mode Please enter your choice: ''') if choice =='A' or choice =='a': easy() elif choice =='B' or choice =='b': medium() elif choice =='C' or choice =='c': hard() print() # Gamemode Easy def easy(): guessesTaken = 0 print('Hello! What is your name?') myName = input() number = random.randint(1, 15) print('Well, ' + myName + ', I am thinking of a number between 1 and 15.') for guessesTaken in range(7): print('Take a guess.') # Four spaces in front of "print" guess = input() guess = int(guess) if guess < number: print('Your guess is too low.') # Eight spaces in front of "print" if guess > number: print('Your guess is too high.') if guess == number: break if guess == number: guessesTaken = str(guessesTaken + 1) print('Good job, ' + myName + '! You guessed my number in ' + guessesTaken + ' guesses!') if guess != number: number = str(number) print('Nope. The number I was thinking of was ' + number + '.') # Gamemode Medium def medium(): guessesTaken = 0 print('Hello! What is your name?') myName = input() number = random.randint(1, 20) print('Well, ' + myName + ', I am thinking of a number between 1 and 20.') for guessesTaken in range(6): print('Take a guess.') # Four spaces in front of "print" guess = input() guess = int(guess) if guess < number: print('Your guess is too low.') # Eight spaces in front of "print" if guess > number: print('Your guess is too high.') if guess == number: break if guess == number: guessesTaken = str(guessesTaken + 1) print('Good job, ' + myName + '! You guessed my number in ' + guessesTaken + ' guesses!') if guess != number: number = str(number) print('Nope. The number I was thinking of was ' + number + '.') # Gamemode Hard def hard(): guessesTaken = 0 print('Hello! What is your name?') myName = input() number = random.randint(1, 50) print('Well, ' + myName + ', I am thinking of a number between 1 and 50.') for guessesTaken in range(5): print('Take a guess.') # Four spaces in front of "print" guess = input() guess = int(guess) if guess < number: print('Your guess is too low.') # Eight spaces in front of "print" if guess > number: print('Your guess is too high.') if guess == number: break if guess == number: guessesTaken = str(guessesTaken + 1) print('Good job, ' + myName + '! You guessed my number in ' + guessesTaken + ' guesses!') if guess != number: number = str(number) print('Nope. The number I was thinking of was ' + number + '.')

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Clarification on using regular expression
by Arulanand Nagarajan (RBEI/EEV51-EC) Aug. 30, 2019

Aug. 30, 2019

Hi, I am currently working on a python script which uses regular expressions for processing some data. I have some string as below(each in new line): aa1 !=5 bb1 >=1 cc1 ==1 dd2 <= 2 e3 <2 >From this string, I want to get a list of all the labels that are before the comparison operator and another list that contains the values after the comparison operator. That is list1 = ['aa1','bb1','cc1','dd2','e3'] list2 = ['5','1','1','2','2'] How will I be able to do that? I was able to get label before the '==' operator using the command below: [v.strip() for v in re.findall("[a-zA-Z0-9_.]* ? (?==\=)", string)]. But i want all the labels that are placed before all the comparison operators (!=, ==, <, >, <=, >=). i have tried the commands below: [v.strip() for v in re.findall("[a-zA-Z0-9_.]* ? (?(!=|==|<=|>=|>|<)\=)", string)] [v.strip() for v in re.findall("[a-zA-Z0-9_.]* ? (?(!=|==|<=|>=|>|<))", string)] Can you pl. help me on this? Best regards, Nagarajan Arulanand RBEI/EEV5-EC

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Appending to CSV file puts data in wrong columns
by Benjamin Fishbein Aug. 30, 2019

Aug. 30, 2019

Here’s the code, using the csv module. It adds a new row to an existing file. def save_sku_and_price_data_to_csv(sku, price, path): row = {"sku": sku, "price": price} with open(path, "a") as csvfile: writer = csv.DictWriter(csvfile, fieldnames=row.keys()) writer.writerow(row) print("adding", row, "to", path) Here’s the problem: It worked properly the first time I ran it, but today it has been writing the “sku”s in the “price” column and the “price”s in the “sku” column. Any idea why this is or how to fix it?

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Doctest meets unittest
by James Hartley Aug. 30, 2019

Aug. 30, 2019

Does anyone ever try to insert doctest sessions into the docstring descriptions of the TestCase’s? Thanks!

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Re: [Tutor] NLP
by David L Neil Aug. 28, 2019

Aug. 28, 2019

On 27/08/19 6:29 AM, Olsen, Avalow Y wrote:> Thanks again, David! > > Other suggestions I received include training myself first by reading a > good book or getting more familiar with Python. I did a crush learning > on Python syntax over the weekend on my own. I decided to read the > book below next. And go from there. - Ava Ava, I have only briefly glanced at one or two articles in this series (19 as of yesterday) and make no comment about the suitability or efficacy of the tools discussed, but you may find them worthy of review:- Python for NLP: Working with Text and PDF Files By Usman Malik • March 07, 2019 https://stackabuse.com/python-for-nlp-multi-label-text-classification-with-… -- Regards =dn

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NLP
by Olsen, Avalow Y Aug. 26, 2019

Aug. 26, 2019

Hi, I am new to Python but need to make a proof of concept to use Python to build a predictive model for cancer diagnosis on our lab data with Natural Language Processing (NLTK). Has anyone done any cancer work with NLP? Given my situation, what is the best way to get started? Thank you in advance! Ava ________________________________ This e-mail and any files transmitted with it are confidential and are intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient or the individual responsible for delivering the e-mail to the intended recipient, please be advised that you have received this e-mail in error and that any use, dissemination, forwarding, printing, or copying of this e-mail is strictly prohibited. If you have received this communication in error, please return it to the sender immediately and delete the original message and any copy of it from your computer system. If you have any questions concerning this message, please contact the sender. Disclaimer R001.0

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Re: [Tutor] seeking design pattern (rmlibre)
by rmlibre＠riseup.net Aug. 26, 2019

Aug. 26, 2019

Cameron's solution is very elegant and simple, I would suggest it unless you have a strong reason not to. That said, I have had a use for a similar idea in a real-world case: --- m.py def very_expensive_function(): """make a global s (constant or variable) that is very expensive to compute""" global s s = "expensive computation" def a(): """either do something with s or return s as-is""" global s return s """ In this use-case you'd perform the expensive computation once at the global level in the imported script. This way it's only run once at import """ very_expensive_function() --- Interactive Console >from m import a >a() >>'expensive computation' You could also just import the global s >from m import s >s >'expensive computation' But in your example, this wouldn't be necessary since s is not expensive to compute, making Cameron's suggestion shine again. However, you may want to perform some expensive computation on s in one script or console, but where the underlying function/class and function/class state resides and depends on another script. I can see this being valuable. In that case: --- m.py def very_expensive_function(some_input): """do some expensive computation with some_input and/or state within m.py and save it to a global s""" global s s = f"very expensive computation with {some_input}" def a(cheap_function=None): if cheap_function: return cheap_function(s) else: return s very_expensive_function("some state within the m.py module") --- Interactive Console >from m import a, very_expensive_function > >a() >'very expensive computation with some state within the m.py module' > >very_expensive_function(3) >a() >'very expensive computation with 3' """ a hundred lines of code later, quickly get the value without doing the very expensive computation again and irrespective of the scope """ >a() >'very expensive computation with 3' m.py could also be a shared resource between many different modules. In that case you also may want to use this idea so you don't have to define s in every module. You could instead define it in just one module, m.py, which is called by all the others. And since it can also just be calculated once at import, it automates the process of creating a constant or variable which is unique to each instantiation (such as creating a random number seed for a PRNG, or getting date based data). On 2019-08-25 01:47, tutor-request(a)python.org wrote: > Send Tutor mailing list submissions to > tutor(a)python.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://mail.python.org/mailman/listinfo/tutor > or, via email, send a message with subject or body 'help' to > tutor-request(a)python.org > > You can reach the person managing the list at > tutor-owner(a)python.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Tutor digest..." > > Today's Topics: > > 1. Re: venv questions (Mats Wichmann) > 2. Re: Fwd: Mailing list chaos. (David L Neil) > 3. seeking design pattern (bob gailer) > 4. Re: Fwd: Mailing list chaos. (David Rock) > 5. Re: seeking design pattern (Cameron Simpson) > > _______________________________________________ > Tutor maillist - Tutor(a)python.org > https://mail.python.org/mailman/listinfo/tutor

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