🌐 Mailman 3 February 2022 - Tutor - python.org

Tkinter canvas on frame
by Phil March 1, 2022

March 1, 2022

This is part of a project I was working on a couple of months ago and I didn't notice that there is a problem until today when I added some colours. The question is, how can I site the canvas on the frame so that the blue frame surrounds the canvas? Without the canvas the whole frame is blue. I suspect that it's to do with the pack manager. import tkinter as tk class Root(tk.Tk): def __init__(self): super().__init__() self.title("Canvas Template") self.geometry("400x300") self.frame = tk.Frame(background='cornflowerblue') self.frame.pack(fill=tk.BOTH, expand=1) canvas = tk.Canvas(self, relief='flat', background='lightgrey', width=200, height=200) canvas.pack(side=tk.TOP, anchor='nw', padx=10, pady=10) quit_button = tk.Button(self, text="Quit", command=self.quit) quit_button.pack(side=tk.BOTTOM, anchor='se', padx=10, pady=10) if __name__ == "__main__": root = Root() root.mainloop() -- Regards, Phil

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Tutoring co-workers.
by trent shipley Feb. 28, 2022

Feb. 28, 2022

I'm looking at the possibility of teaching programming to a couple of coworkers. Python is an excellent pedagogical programming language, with the added benefit of what you learn being directly applicable and marketable in many work contexts. First, I was wondering if you could recommend any good, accessible textbooks with many exercises for brand new and C+/B- level programmers new to Python which could segue into Python plus statistics or Python plus reporting, and beyond that into very early Python plus data science. Second, and more important, I took BASIC in high school. When I went to a little liberal arts college in central Kansas in the late 1980s, I took computer science 110 and 210 in Pascal and turned in the code for my assignments on fan-fold paper hard copy. My professor (with an actual PhD) graded the code in beautiful red ink with all the care and attention of a composition instructor for college freshmen. I didn't realize how much I got out of it, until I realized how much I missed that kind of feedback when I take computer classes at a community college, especially when the classes are self-paced distance learning classes. I also can tell younger programmers have never had the same academic formation I did. I would like a coding environment where I can comment and edit code and other text like it was Microsoft Word in draft mode. In fact, I want to be able to comment on comments. You should be able to do remote, real-time Talmudic disputation in this development environment, and go back through versions with all the text changes and evolution of comments graphically illustrated with popup "tooltips", and you should be able to drill down for change metadata. My goal is to use it for teaching coding by giving the same attention to my students' feedback which Marrion Deckert gave to my ealy software writing education, but without paper and at a distance. How close can I come to this vaporware ideal? (Oh yes, and a student should be able to drop their corrected code, with all the history and comments hidden, straight into a syntax checker, REPL, interpreter, or compiler.) Trent

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I am having trouble getting some associations to work
by Tom Linsenmeyer Feb. 28, 2022

Feb. 28, 2022

I cannot get either self or getmakecar and getmaketruck to associate with self or def getmakecar() and getmaketruck(). I can get one or the other not both Can you please help me Thank you import sys import time #A program to make a virtual garage class Vehicles: def __init__(self, fueltype, make, carmodel, truckmodel, color): """ initialize attributes.""" self.carmodel = carmodel self.truckmodel= truckmodel self.Make_ = make self.Color_ = color self.fueltype_ = fueltype make = {'Make1' : 'Chevrolet', 'Make2' : 'Dodge', 'Make3' : 'Ford'} carmodel = {'Cmodel' : 'Camaro', "Cmodel2" : 'Corvette', 'Cmodel3' : 'Charger', 'Cmodel4' : 'Challenger'} truckmodel = {'Tmodel1' : 'Silverado', 'Tmodel2' : 'Tahoe','Tmodel3' : 'Ram-1500', 'Tmodel4' :'Ram-2500',' Tmodel5' :'F-150', 'Model_' : 'F-250'} fueltype = {'fuelType1' : 'Gasoline', 'fuelType2' : 'Diesel', 'fuelType3' : 'FlexFuel'} color = {'Color1' : 'White', 'Color2' : 'Black', 'Color3' : 'Blue', 'Color4' : 'Red', 'Color5' : 'Yellow'} def mainmenu(self): print("Welcome to your garage! Please make a selection") print("1: Car") print("2: Truck") print("3: Quit") choice = int(input()) if choice == 1: print("Car") getmaker() #elif choice == 2: # getmakeTruck() elif choice == 3: quit() else: print ("Select either Car, Truck or Quit") def getmakecar(self): print('Pick from cars') #self.make#[Make1],[Make2],[Make3] def quit(self): print("Leaving your garage") time.sleep(2) sys.exit() def getmaketruck(self): pass #class Car(Vehicles): # def carmenu(): # print("Car Menu") # choice = int(input(""" # 1: Make # 2: Model # 3: Color # 4: Fuel Type # 5: Options # 6: Quit # """)) # if choice == 1: # make() #elif choice == 2: # model() #elif choice == 3: # color() #elif choice == 4: # fueltype() #elif choice == 5: # 3 options() # elif choice == 6: # else: #car_menu() # def make(Vehicles): #options = ['powerlocks', 'powerwindows','powermirrors', 'powerseat', 'premium_sound', 'back_up_camera', 'leather_seats','trailer_package'] #print (make) -- Tom Linsenmeyer https://emrisinternational.com/Robin

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Tutoring co-workers.
by Formula Root Feb. 27, 2022

Feb. 27, 2022

Trent, Try: - replit.com - codingrooms.com On Sun, Feb 27, 2022 at 12:01 PM <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: Tutoring co-workers. (Nikil George) > 2. Tkinter canvas on frame (Phil) > 3. Re: Tkinter canvas on frame (Alan Gauld) > > > > ---------- Forwarded message ---------- > From: Nikil George <georgenikil(a)outlook.com> > To: Mats Wichmann <mats(a)wichmann.us>, "tutor(a)python.org" <tutor(a)python.org > > > Cc: > Bcc: > Date: Sat, 26 Feb 2022 16:12:58 +0000 > Subject: Re: [Tutor] Tutoring co-workers. > Thank you!! > > Get Outlook for Android<https://aka.ms/AAb9ysg> > ________________________________ > From: Tutor <tutor-bounces+georgenikil=outlook.com(a)python.org> on behalf > of Mats Wichmann <mats(a)wichmann.us> > Sent: Saturday, February 26, 2022 10:06:45 AM > To: tutor(a)python.org <tutor(a)python.org> > Subject: Re: [Tutor] Tutoring co-workers. > > On 2/25/22 14:59, trent shipley wrote: > > I'm looking at the possibility of teaching programming to a couple of > > coworkers. Python is an excellent pedagogical programming language, with > > the added benefit of what you learn being directly applicable and > > marketable in many work contexts. > > > > in the late 1980s, I took > > computer science 110 and 210 in Pascal and turned in the code for my > > assignments on fan-fold paper hard copy. > > My first "formal" language was also Pascal (had previously learned > Fortran and Basic outside an academic setting). It was the era of > Pascal, I guess (mine was a little earlier, we had to jockey for the > very small number of cursor-addressable ADM 3a terminals that made > screen-based editing possible). > > > > > My goal is to use it for teaching coding by giving the same attention to > my > > students' feedback which Marrion Deckert gave to my ealy software writing > > education, but without paper and at a distance. How close can I come to > > this vaporware ideal? > > > > (Oh yes, and a student should be able to drop their corrected code, with > > all the history and comments hidden, straight into a syntax checker, > REPL, > > interpreter, or compiler.) > > There are some new and shiny ways to maybe get some of the spirit of > this with some of the online collaborative editing environments, when > combined with a github repo. It would be very different than red pen on > fanfold paper, but... I don't know too many of the entrants in this > exploding field, but take a look at Gipod, Replit or Codeshare. > _______________________________________________ > Tutor maillist - Tutor(a)python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor > > > > > ---------- Forwarded message ---------- > From: Phil <phillor9(a)gmail.com> > To: tutor(a)python.org > Cc: > Bcc: > Date: Sun, 27 Feb 2022 15:55:43 +1100 > Subject: [Tutor] Tkinter canvas on frame > This is part of a project I was working on a couple of months ago and I > didn't notice that there is a problem until today when I added some > colours. > > The question is, how can I site the canvas on the frame so that the blue > frame surrounds the canvas? Without the canvas the whole frame is blue. > I suspect that it's to do with the pack manager. > > import tkinter as tk > > > class Root(tk.Tk): > def __init__(self): > super().__init__() > self.title("Canvas Template") > self.geometry("400x300") > > self.frame = tk.Frame(background='cornflowerblue') > > self.frame.pack(fill=tk.BOTH, expand=1) > > canvas = tk.Canvas(self, relief='flat', background='lightgrey', > width=200, height=200) > canvas.pack(side=tk.TOP, anchor='nw', padx=10, pady=10) > > quit_button = tk.Button(self, text="Quit", command=self.quit) > quit_button.pack(side=tk.BOTTOM, anchor='se', padx=10, pady=10) > > > if __name__ == "__main__": > root = Root() > root.mainloop() > > -- > Regards, > Phil > > > > > > ---------- Forwarded message ---------- > From: Alan Gauld <alan.gauld(a)yahoo.co.uk> > To: tutor(a)python.org > Cc: > Bcc: > Date: Sun, 27 Feb 2022 08:35:31 +0000 > Subject: Re: [Tutor] Tkinter canvas on frame > On 27/02/2022 04:55, Phil wrote: > > > class Root(tk.Tk): > > def __init__(self): > > super().__init__() > > self.title("Canvas Template") > > self.geometry("400x300") > > > > self.frame = tk.Frame(background='cornflowerblue') > > > > self.frame.pack(fill=tk.BOTH, expand=1) > > > > canvas = tk.Canvas(self, relief='flat', background='lightgrey', > > width=200, height=200) > > canvas.pack(side=tk.TOP, anchor='nw', padx=10, pady=10) > > Try changing the anchor from Northwest('nw') to 'center' > > > -- > 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 > https://mail.python.org/mailman/listinfo/tutor >

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Use of Python 3 on a Mac
by André FOURNERAT Feb. 27, 2022

Feb. 27, 2022

Hello, I use a Mac under OS 10.11.6. I have downloaded Python I use a book in French « Apprendre à programmer avec Python 3 » (Learning to program with Python 3). one of the first exercises should read this >>> a=20 >>> if (a>100): … print (« a is more than a hundred ») … else: … print (« a is less than a hundred ») … but the result is this with Python 3.9.0 and it is this with Python 3.10.2 With earlier version, the result is the same. What could be the appropriate Python version to work on my Mac? Best regards André

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theory: geography and python
by Nathan Smith Feb. 27, 2022

Feb. 27, 2022

Hi folks, This is more of a theory based discussion topic (with luck). Off and on I've been considering geography in python for a while, more specifically, how you would go about positioning countries and borders. Countries are, by their nature, rarely nice squares, so you could hardly say: England=(left lat, right lat) ireland = (left lat, right lat). Is there an industry standard for this sort of thing to get the shapes of countries semi accurate in terms of coordinates and borders? What sources should be looked at? Thanks in advance for any ideas. Nathan -- Best Wishes, Nathan Smith, BSC My Website: https://nathantech.net

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Excel to SQL DB using Python
by Hannah Jones Feb. 25, 2022

Feb. 25, 2022

Hello, I need help with some code if possible please. I am trying to convert an excel file to a list and then iterate over the list and add to an SQL database. I am having trouble adding the data to the database. I have already established the connection - all good. My code is: Locations = [] filename = input("Enter Filename Containing your Locations: ") with open(filename, "r") as csv_file: csv_reader = csv.reader(csv_file, delimiter=',') #skips the header from the excel file next(csv_reader) for lines in csv_reader: Locations.append(lines) # SQL Statements sqlDELETE = "DELETE FROM dbo.GeocodingLocations" cursor.execute(sqlDELETE) sqlINSERTBase = "INSERT INTO dbo.GeocodingLocations (SageCode, Name, AddressLine1, AddressLine2, AddressLine3, AddressLine4, City, CountryName) VALUES " sqlVALUES = "" # Iteration to add to Studio DB for x in Locations: SageCode = x[0] ; Name = x[1] ; AddressLine1 = x[2] ; AddressLine2 = x[3] ; AddressLine3 = x[4] ; AddressLine4 = x[5] ; City = x[6] ; CountryName = x[7] sqlVALUES = sqlVALUES + "( '" + SageCode + "', '" + Name + "', '" + AddressLine1 + "', '" + AddressLine2 + "', '" + AddressLine3 + "', '" + AddressLine4 + "', '" + City + "', '" + CountryName + "' ), '" sqlINSERT = sqlINSERTBase + sqlVALUES sqlINSERT = sqlINSERT cursor.execute(sqlINSERT) cursor.commit() con.close() however I keep receiving this error; pyodbc.ProgrammingError: ('42000', "[42000] [Microsoft][ODBC Driver 17 for SQL Server][SQL Server]Incorrect syntax near 'S'. (102) (SQLExecDirectW)") I know my error is in this line; sqlVALUES = sqlVALUES + "( '" + SageCode + "', '" + Name + "', '" + AddressLine1 + "', '" + AddressLine2 + "', '" + AddressLine3 + "', '" + AddressLine4 + "', '" + City + "', '" + CountryName + "' ), '" but I am not sure where exactly, any help is highly appreciated. Thank you Hannah

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dealing with lists (2)
by marcus.luetolf＠bluewin.ch Feb. 25, 2022

Feb. 25, 2022

Sorry, I sent my following comment to the wrong address : Yes, you are right. But but my final goal is to create 20 sublistst with item-pairs (16 items total) appearing only once. I found that my initial approach to which I postet questions a few days ago lead to a dead end. So I used a simpler way tro create those 20 sublists as posted more recently. I am still working on a way to change the sequence of items in those 20 sublists til the condition concerning the pairs of items is met. I know that my goal is mathematically possible with 16 items in 20 sublists from a discussion a couple of years ago. I refined my code below but with changing the indices of f1, f2, f3, f4 and by n manually I'am unable to avoid double pairings. I think I reached another dead end. Bur mybe someone could give me an idea for a different approach before giving up. >comb_list = [] f>or dummy_i in range(4): >copy_all_letters = all_letters[:] >lst = (16*16)*copy_all_letters >f1 = [] >f2 = [] >f3 = [] >f4 = [] > f1.append(lst[0+n]) >f1.append(lst[2+n]) >f1.append(lst[4+n]) >f1.append(lst[6+n]) > f1.sort() >comb_list.append(f1) >f2.append(lst[8+n]) >f2.append(lst[10+n]) >f2.append(lst[12+n]) >f2.append(lst[14+n]) >f2.sort() >comb_list.append(f2) > f3.append(lst[1+n]) >f3.append(lst[3+n]) >f3.append(lst[5+n]) >f3.append(lst[7+n]) >f3.sort() >comb_list.append(f3) > f4.append(lst[9+n]) >f4.append(lst[11+n]) > f4.append(lst[13+n]) > f4.append(lst[15+n]) >f4.sort() > comb_list.append(f4) > print(f1, f2, f4, f4) > print(comb_list) > n += 3 Hello Experts, I try to solve the following problem: I'd like to create 5 lists, each containing 4 sublists : f1, f2, f3, f4, f5, a total of 20 sublists. I have a list (named all_letters) contaning 16 characters a, b, c, ...p. I would liketo distribute all 16 characters to the 4 sublists 5 times in 5 iterations respectivly so that as a condition a pair of characters, p.e. ['a', 'b', .] or ['a', 'c'.] or [.'n', 'p'] can appear only once in all 20 sublists. To find the sublists fullfilling this condition I designed the following code with the intention to change the indices defined by the variables n and p til the condition is met : all_letters = list('abcdefghijklmnop') f1 = [] f2 = [] f3 = [] f4 = [] n = 0 p = 1 for dummy_i in range(5): copy_all_letters = all_letters[:] lst = 16*copy_all_letters f1.append(lst[n+0]) f1.append(lst[n+p]) f1.append(lst[n+2*p]) f1.append(lst[n+3*p]) f1.sort() f2.append(lst[n+4*p]) f2.append(lst[n+5*p]) f2.append(lst[n+6*p]) f2.append(lst[n+7*p]) f2.sort() f3.append(lst[n+8*p]) f3.append(lst[n+9*p]) f3.append(lst[n+10*p]) f3.append(lst[n+11*p]) f3.sort() f4.append(lst[n+12*p]) f4.append(lst[n+13*p]) f4.append(lst[n+14*p]) f4.append(lst[n+15*p]) f4.sort() print('f1: ', f1) print('f2: ', f2) print('f3: ', f3) print('f4: ', f4) n += 4 p += 1 f1 = [] f2 = [] f3 = [] f4 = [] f5 = [] But I'm unable to define the condition mentioned above and asking for your help.

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Tkinter checkbutton
by Phil Feb. 24, 2022

Feb. 24, 2022

Out of curiosity, I'm wondering if the select area (the area where the tick is displayed when the button is selected) can be set when the checkbutton is selected? According to the documentation the default colour is red but in my case it's white and doesn't change colour when the checkbutton is selected. This is from the tk docs. "selectcolor The color of the checkbutton when it is set. By default, it is red." This is one of my checkbuttons: self.red_check_button = ttk.Checkbutton(self.frame, text='Red LED', selectcolor='red', variable=self.red_value) This causes the select area to be red whether the checkbutton is selected or not and it's the same for a tk or ttk checkbutton. The way the checkbutton behaves could possibly depend on the OS used. -- Regards, Phil

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dealing with lists (2)
by marcus.luetolf＠bluewin.ch Feb. 24, 2022

Feb. 24, 2022

Hello Experts, I try to solve the following problem: I'd like to create 5 lists, each containing 4 sublists : f1, f2, f3, f4, f5, a total of 20 sublists. I have a list (named all_letters) contaning 16 characters a, b, c, ...p. I would liketo distribute all 16 characters to the 4 sublists 5 times in 5 iterations respectivly so that as a condition a pair of characters, p.e. ['a', 'b', .] or ['a', 'c'.] or [.'n', 'p'] can appear only once in all 20 sublists. To find the sublists fullfilling this condition I designed the following code with the intention to change the indices defined by the variables n and p til the condition is met : all_letters = list('abcdefghijklmnop') f1 = [] f2 = [] f3 = [] f4 = [] n = 0 p = 1 for dummy_i in range(5): copy_all_letters = all_letters[:] lst = 16*copy_all_letters f1.append(lst[n+0]) f1.append(lst[n+p]) f1.append(lst[n+2*p]) f1.append(lst[n+3*p]) f1.sort() f2.append(lst[n+4*p]) f2.append(lst[n+5*p]) f2.append(lst[n+6*p]) f2.append(lst[n+7*p]) f2.sort() f3.append(lst[n+8*p]) f3.append(lst[n+9*p]) f3.append(lst[n+10*p]) f3.append(lst[n+11*p]) f3.sort() f4.append(lst[n+12*p]) f4.append(lst[n+13*p]) f4.append(lst[n+14*p]) f4.append(lst[n+15*p]) f4.sort() print('f1: ', f1) print('f2: ', f2) print('f3: ', f3) print('f4: ', f4) n += 4 p += 1 f1 = [] f2 = [] f3 = [] f4 = [] f5 = [] But I'm unable to define the condition mentioned above and asking for your help.

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