🌐 Mailman 3 July 2016 - 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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Desktop Notifications on Linux
by Dharmit Shah June 29, 2017

June 29, 2017

Hi all, I am trying to create a script that will go through the /var/log/secure file on a Linux system and provide desktop notifications for failed login attempts. Here is the code - http://pastebin.com/MXP8Yd91 And here's notification.py - http://pastebin.com/BhsSTP6H I am facing issue in the function "new_attempts_from_last". I am not able to raise a desktop notification from this function. It always fails with this traceback - http://pastebin.com/cgHMScv3 I see this error only when I try to raise a notification from the aforementioned function. If I run test examples under /usr/share/doc/notify-python/examples, it works just fine. Also, if I try to raise a notification from under if __name__ == "__main__":, it works without any issues. So I don't think there's any issue with OS's notification daemon. Running from python shell like below also works fine: In [1]: import notification In [2]: notification.notification("Hey") What am I missing or doing wrong here? If it matters, I am running Fedora 20, python 2.7 and Cinnamon desktop environment. For readability purposes, I have provided pastebin links. Let me know if this is not the correct way. Regards, Dharmit.

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Book recommendation
by D Wyatt Aug. 1, 2016

Aug. 1, 2016

Hello. I've been a member of this group for a very long time and have played with Python for years, but have never gotten past being a beginner for various reasons. I just discovered a very good, free book, that is answering many of the questions I have had in the past that I never got answers I could understand from you all. While I appreciate the time and effort you put in helping us out, most of you do not remember what you didn't used to know, and are often less than helpful because of this. This is not meant as a criticism, but just my observation. Anyway, this book I found, Learning Python, is well-written and easy to understand. Here is a url to it. https://www.packtpub.com/tech/python. no affiliation, etc, I just wanted to share this great resource. I am finding this book so easy to read I am reading it instead of my usual non-fiction. -- Deb Wyatt in WA

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Help on Assignments
by Justin Korn July 30, 2016

July 30, 2016

To whom it may concern, I need someone to help me to develop programs for the following assignments. I have been working on these assignments for a week and a half, and I can't make any progress. I also been dealing with a sick relative, so please help me out immediately. I use the version 3.4.1. Here are the following assignments and what I have so far: 1. Define a new kind of Turtle, TurtleGTX, that comes with some extra features: it can jump forward a given distance, and it has an odometer that keeps track of how far the turtle has travelled since it came off the production line. (The parent class has a number of synonyms like fd, forward, back, backward, and bk: for this exercise, just focus on putting this functionality into the forward method.) Think carefully about how to count the distance if the turtle is asked to move forward by a negative amount. (We would not want to buy a second-hand turtle whose odometer reading was faked because its previous owner drove it backwards around the block too often. Try this in a car near you, and see if the car’s odometer counts up or down when you reverse.) import turtle class turtle_Turtle(): ts = turtle.Screen() ts.title("TurtleGTX") bob = turtle.Turtle() bob.shape("turtle") bob.color("brown") class TurtleGTX(turtle_Turtle): odometer = 0 def forward(x): if (x >= 0): i = 0 while (i < x): self.fd() odometer += 1 i+=1 else: i = 0 while (i > x): self.bk() odometer +=1 i-=1 print ("Odometer is", odemeter) my_turtle = TurtleGTX() my_turtle.foward() 2. You are to develop a program (name it trivia_game.py) that will play a trivia game with two players. The game will be played this way: Starting with player 1, each player gets a turn at answering 5 trivia questions. When a question is displayed, 4 possible answers are also displayed (1 of the 4 is the correct answer). A correct answer earns the player 1 point. After both players have answered their 5 questions the program will display the number of points earned by each player and declare the player with the most points the winner (or a tie if both players have earned the same number of points). You must write a class (name it Question.py) to hold the data for a trivia question. The class should have the following attributes: A trivia question Possible answer 1 Possible answer 2 Possible answer 3 Possible answer 4 The number of the correct answer (1, 2, 3, or 4) The Question class should have an appropriate __init__ method, accessors and mutators. Your program should have a list or dictionary containing 10 Question objects, one for each trivia question. You are to make up your own trivia questions. Submit both files (zip the two files if possible). trivia_game.py import sys import random import Question.py questions = [ Question("How many states start with the letter M", 3, ["6", "7", "8", "9"]), Question("What is the area of a right triagle with a hypotenuse of 10 and an altitude of 8", 1, ["24", "40", "48", "80"]), Question("Which physics quantity is not a vector", 4, ["Acceleration", "Momentum", "Torque", "Work"]), Question("How many inches are in a foot", 2, ["6", "12", "18", "24"]), Question("Who does not play in the NFL anymore", 3, ["Frank Gore", "Richard Sherman", "Peyton Manning", "Antonio Gates"]), Question("What is a bakers dozen equivalent to", 4, ["10", "11", "12", "13"]), Question("Which city has a NBA team", 1, ["Sacramento", "Baltimore", "St. Louis", "Pittsburgh"]), Question("Which of the following elements have eleven protons", 4, ["boron", "sulfur", "floruine", "sodium"]), Question("What is the minimum age to run for president of the United States", 2, ["30", "35", "40", "45"]), Question("Who won super bowl 44", 1, ["New Orleans Saints", "Pittsburgh Steelers", "Minnesota Vikings", "Indianapolis Colts"]) ] random.shuffle(questions) # Randomize the order of the questions for question in questions: question.ask() Question.py 3. Our final exam is a real world problem about efficiency in a warehouse. XYZ Corporation sells products online. The company has a large warehouse in which it stores its inventory of products. Orders are picked, packed and shipped from the warehouse. XYZ Corporation has contracted with you to write a program that will minimize the number of steps that the staff in the warehouse (called ODA's) take in picking the products ordered by customers. The information you will need to complete this assignment are in the following files: Specifications: CTIM285_Summer_2016_FinalExam.pdf Warehouse Map: WarehouseImage.pdf Data for Analysis: warehouse_data_final_exam_Python.txt Data for Analysis is saved in this order on each line of the file: [orderNumber, partNumber, quantyNumber, aisleNumber, shelfNumber, binNumber] infile = open("warehouse_data.txt", "r") for x in infile for j in range(3, 6): if (j == 1): temp=a[0:3] a[0:3]=a[3:] a[3:]=temp Thanks, Justin

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Help on Assginments
by Justin Korn July 30, 2016

July 30, 2016

To whom it may concern, I need someone to help me to develop programs for the following assignments: 1. Define a new kind of Turtle, TurtleGTX, that comes with some extra features: it can jump forward a given distance, and it has an odometer that keeps track of how far the turtle has travelled since it came off the production line. (The parent class has a number of synonyms like fd, forward, back, backward, and bk: for this exercise, just focus on putting this functionality into the forward method.) Think carefully about how to count the distance if the turtle is asked to move forward by a negative amount. (We would not want to buy a second-hand turtle whose odometer reading was faked because its previous owner drove it backwards around the block too often. Try this in a car near you, and see if the car’s odometer counts up or down when you reverse.) 2. You are to develop a program (name it trivia_game.py) that will play a trivia game with two players. The game will be played this way: Starting with player 1, each player gets a turn at answering 5 trivia questions. When a question is displayed, 4 possible answers are also displayed (1 of the 4 is the correct answer). A correct answer earns the player 1 point. After both players have answered their 5 questions the program will display the number of points earned by each player and declare the player with the most points the winner (or a tie if both players have earned the same number of points). You must write a class (name it Question.py) to hold the data for a trivia question. The class should have the following attributes: A trivia question Possible answer 1 Possible answer 2 Possible answer 3 Possible answer 4 The number of the correct answer (1, 2, 3, or 4) The Question class should have an appropriate __init__ method, accessors and mutators. Your program should have a list or dictionary containing 10 Question objects, one for each trivia question. You are to make up your own trivia questions. Submit both files (zip the two files if possible). Our final exam is a real world problem about efficiency in a warehouse. 3. XYZ Corporation sells products online. The company has a large warehouse in which it stores its inventory of products. Orders are picked, packed and shipped from the warehouse. XYZ Corporation has contracted with you to write a program that will minimize the number of steps that the staff in the warehouse (called ODA's) take in picking the products ordered by customers. The information you will need to complete this assignment are in the following files: Specifications: CTIM285_Summer_2016_FinalExam.pdf Warehouse Map: WarehouseImage.pdf Data for Analysis: warehouse_data_final_exam_Python.txt Data for Analysis is saved in this order on each line of the file: [orderNumber, partNumber, quantyNumber, aisleNumber, shelfNumber, binNumber] Thanks, Justin

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IDLE Subprocess Startup Error
by Darah July 30, 2016

July 30, 2016

Hello, I’ve been using Python’s IDLE for a couple of weeks now and it has been working fine but a few days ago I started getting this error message "IDLE's subprocess didn't make connection. Either IDLE can't start a subprocess or personal firewall software is blocking the connection.” I tried uninstalling it, restarting my computer, found a couple of people that said deleting the created .py files worked for them but it did not for me. I am not sure what else to do. Do you have any suggestions? I am using OS X El Capitan 10.11.5 on mac Regards, Darah Pereira

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Unable to download <th>, <td> using Beautifulsoup
by Crusier July 30, 2016

July 30, 2016

I am using Python 3 on Windows 7. However, I am unable to download some of the data listed in the web site as follows: http://data.tsci.com.cn/stock/00939/STK_Broker.htm 453.IMC 98.28M 18.44M 4.32 5.33 1499.Optiver 70.91M 13.29M 3.12 5.34 7387.花旗环球 52.72M 9.84M 2.32 5.36 When I use Google Chrome and use 'View Page Source', the data does not show up at all. However, when I use 'Inspect', I can able to read the data. '<th>1453.IMC</th>' '<td>98.28M</td>' '<td>18.44M</td>' '<td>4.32</td>' '<td>5.33</td>' '<th>1499.Optiver </th>' '<td> 70.91M</td>' '<td>13.29M </td>' '<td>3.12</td>' '<td>5.34</td>' Please kindly explain to me if the data is hide in CSS Style sheet or is there any way to retrieve the data listed. Thank you Regards, Crusier from bs4 import BeautifulSoup import urllib import requests stock_code = ('00939', '0001') def web_scraper(stock_code): broker_url = 'http://data.tsci.com.cn/stock/' end_url = '/STK_Broker.htm' for code in stock_code: new_url = broker_url + code + end_url response = requests.get(new_url) html = response.content soup = BeautifulSoup(html, "html.parser") Buylist = soup.find_all('div', id ="BuyingSeats") Selllist = soup.find_all('div', id ="SellSeats") print(Buylist) print(Selllist) web_scraper(stock_code)

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Re: [Tutor] python programmin problem
by monikajg＠netzero.net July 28, 2016

July 28, 2016

Thank you very much. I will look into your suggestions. I have been looking for tutorials but could not find anything at my level of understanding. You said to not focus on python but I had a python teacher (a famous python book writer and a friend of Guido) was stressing on doing things in "pythonic" way. Thank you for the links and I will check/read each one of them. Monika ---------- Original Message ---------- From: Danny Yoo <dyoo(a)hashcollision.org> To: "monikajg(a)netzero.net" <monikajg(a)netzero.net> Cc: Alan Gauld <alan.gauld(a)yahoo.co.uk>, Python Tutor Mailing List <tutor(a)python.org> Subject: Re: [Tutor] python programmin problem Date: Wed, 27 Jul 2016 21:42:25 -0700 > You will see a problem being explained that you should be *very* > interested in. :) Here's a link just to give you a taste: > > https://youtu.be/0yjebrZXJ9A?t=3m > > > I hope that this helps point you in the right direction. Good luck! He has some more recent videos from 2012: https://youtu.be/Qc2ieXRgR0k?list=PLOtl7M3yp-DV69F32zdK7YJcNXpTunF2b where he again goes over the familiar example in: https://youtu.be/o0V9eYF4UI8?t=34m52s _______________________________________________ Tutor maillist - Tutor(a)python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor ____________________________________________________________ Affordable Wireless Plans Set up is easy. Get online in minutes. Starting at only $9.95 per month! www.netzero.net?refcd=nzmem0216

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Re: [Tutor] python programmin problem
by monikajg＠netzero.net July 28, 2016

July 28, 2016

Thank you all for your answers. I do not have a teacher or any body else who could guide me. I have taken all python classes offered in my area and many on line. The question is one of questions asked by interviews for a qa position that also does some automation with python. Im just trying to learn so that I could get a job. Nobody offers manual qa jobs anymore so I am working on updating my skills. ---------- Original Message ---------- From: Alan Gauld via Tutor <tutor(a)python.org> To: tutor(a)python.org Subject: Re: [Tutor] python programmin problem Date: Mon, 25 Jul 2016 00:21:10 +0100 On 24/07/16 20:58, Danny Yoo wrote: > Please: I strongly encourage you to talk with your professor or study > group: it really does sound like this is the first time you've seen these > kinds of concepts. I agree with Danny, you should talk to your teacher. I suspect the teacher may have set the problem without appreciating the full extent of the complexity involved. It certainly doesn't seem like you are properly equipped to solve it. Maybe he/she can provide a simpler subset of problem. Of course this assumes you have a teacher to ask? Your original post doesn't state where you found the problem, it may be you just picked it up on a web site or book and have unwittingly bitten off more than you are ready to chew just now? It also depends a bit on whether the intent is to learn about Python programming or about algorithms. If its the latter then you might just want to ask on a different (math based) forum. But if its Python you are interested in then find an easier problem for now. Otherwise you will lose sight of the Python problem in trying to solve the math one. -- 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 _______________________________________________ Tutor maillist - Tutor(a)python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor ____________________________________________________________ Affordable Wireless Plans Set up is easy. Get online in minutes. Starting at only $9.95 per month! www.netzero.net?refcd=nzmem0216

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OOP help needed
by Jim Byrnes July 27, 2016

July 27, 2016

OOP has always driven me crazy. I read the material and follow the examples until I feel I understand them, but when I try to implement it I end up with an error filled mess. So I decided to give it another try. When I got to the chapter on tkinter I decided to solve all the exercises using OOP even though the book solutions did not use OOP. The first one went fine: #exer1.py import tkinter class Goodbye: def __init__(self): self.frame = tkinter.Frame(window) self.frame.pack() self.goodbye_button = tkinter.Button(self.frame, text='Goodbye', #command=quit) command=lambda: quit() ) self.goodbye_button.pack() def quit(): self.window.destroy() if __name__=='__main__': window = tkinter.Tk() myapp = Goodbye() window.mainloop() The second one was more trouble but I finally got it to work. # exer2.py import tkinter class Count: def __init__(self): ''' Increment a button labeled 0, by 1 with each click ''' self.frame = tkinter.Frame(window) self.frame.pack() self.label = tkinter.StringVar() self.label.set('0') self.count_btn = tkinter.Button(self.frame, textvariable=self.label, command=lambda: self.increment(self.label )) self.count_btn.pack() def increment(self, label): count = int(self.label.get()) self.label.set(str(count + 1)) if __name__ == '__main__': window = tkinter.Tk() myapp = Count() window.mainloop() I am having trouble understanding the difference between the two lines that contain lambda: command= .In exer1.py I can do command=lambda: quit(). In exer2.py if I do command=lambda: increment(self.label) I get this error: Exception in Tkinter callback Traceback (most recent call last): File "/usr/lib/python3.4/tkinter/__init__.py", line 1536, in __call__ return self.func(*args) File "exer2.py", line 14, in <lambda> command=lambda: increment(self.label )) NameError: name 'increment' is not defined Why do I get this error? The situations look the same to me but they must be different somehow and I just don't see the difference. Thanks, Jim

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