🌐 Mailman 3 March 2014 - 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

5 8

HELP I need help with Python Setup or to reach Marilyn Davis
by carolynn fryer July 11, 2015

July 11, 2015

I am at the point where I am just spinning my wheels. I tried to get help with logging on but so far I am just getting frustrated. I have a problem that I brought up the first night in class but couldn't seem to get help then. Sorry if I am at the point where I am totally frustrated and I need HELP. PLEASE. I did not turn in homework because of the fact that I can not run anything without getting a syntax error. I tried setting up a path for python environment variables and a few other things but I am getting no where. Can you give me some suggestions why I can't run anything. I have windows 7 on my home computer, and windows 8 on my laptop and they are both doing the same thing. So it has to be something I am doing or not doing. I really do not like being behind/late in anything so that is making me even more frustrated. I suppose I am even more frustrated and afraid to ask because I kink of got a slap in the face last time I took a course here and the instructor would not help. But that was a way different situation, I simply could not understand his English and then he told me he did not have any patience. Excuse me but I just about died when he, an INSTRUCTOR told me that. I worked at Stanford for 25 years and to hear an instructor say those words was unthinkable. Anyway you can maybe understand my reluctance to ask for help but I need help. Any suggestions?? When I use one of the computers at school everything works just fine. Except I can not get my own computer to log on when I am there. So again that is why I said it is my system and something in my set up that I don't have. Sorry for the long note, I was just letting out a little frustration. LOL Thx for any suggestions, Carolynn Fryer ps: I know this is not the proper way to get ahold of you but I could not find nor have time to find any other way. The UCSC system is not very user friendly

8 7

Wave module
by Alex Krycek Feb. 12, 2015

Feb. 12, 2015

Hello, I'm trying to join two .wav files with the wave module. But when I try to use wave.open(filename, "rb") I receive the following error: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "F:\PortablePython1.0\lib\wave.py", line 483, in open return Wave_read(f) File "F:\PortablePython1.0\lib\wave.py", line 162, in __init__ self.initfp(f) File "F:\PortablePython1.0\lib\wave.py", line 143, in initfp self._read_fmt_chunk(chunk) File "F:\PortablePython1.0\lib\wave.py", line 264, in _read_fmt_chunk raise Error, 'unknown format: %r' % (wFormatTag,) wave.Error: unknown format: 85 I read somewhere that there are various wave formats, only some supported by Python. Is this true? If so, is there any way I can convert my wave files into a supported kind? Thanks!

3 2

Storing dictionary value, indexed by key, into a variable
by John Aten April 5, 2014

April 5, 2014

Hey all, I am writing a program to drill the user on Latin demonstrative pronouns and adjectives (DPA). It displays a description, and the user has to enter the DPA that corresponds to the description. DPA vary for gender, number and case, and there are 3 separate DPA. I have these stored in a bunch of dictionaries, with the DPA, gender and number in the dictionary name and the cases as keys. Of course, the values are the DPA themselves. Like so: that_those_Masculine_Singular = {'nom': 'ille', 'gen': 'illīus', 'dat': 'illī', 'acc': 'illum', 'abl': 'illō'} I have a function that randomly selects one of these dictionaries, and another that randomly selects strings corresponding to the keys ('nom', 'gen', etc.). The trouble begins somewhere along here: D = chooseDict() c = chooseCase() print(D, c) guess = '' # code to get the guess # then, answer = D[c] if guess == answer: # Do stuff, change score, continue, etc. This doesn't work, and I get this error: TypeError: string indices must be integers So my question is, why does Python think that D is a string? When I type the actual names (i.e., that_those_Masculine_Singular["nom"]) the answer is returned just fine. I have tried D['c'] and D["c"] also, and got the same error. I searched the web, and I can find no explanation on how to do what I am doing, and I can find nothing that indicates why this doesn't work. I'd really appreciate any help! Thank you, J

5 14

Fwd: Python bingo game.
by Hardik Gandhi April 2, 2014

April 2, 2014

> Hello, > > Can some one help me with displaying a matrix vertically. > > For example my output matrix is:- > > [1 2 5 7 9] > [25 67 78 23 34] > [33 22 66 88 98] > [32 31 41 56 78] > [21 34 58 99 76] > > And i want my matrix to look like this:- > [1 25 33 32 21] > [2 67 22 31 34] > [5 78 66 41 58] > [7 23 88 56 99] > [9 34 98 78 76] > > Please, help me with the code in eclipse using py-dev as preference. > > Thank you

3 3

Re: [Tutor] while loop
by Scott Dunning April 1, 2014

April 1, 2014

On Mar 31, 2014, at 5:15 AM, Dave Angel <davea(a)davea.name> wrote: > > Do you know how to define and initialize a second local variable? > Create one called i, with a value zero. > > You test expression will not have a literal, but compare the two > locals. And the statement that increments will change i, not > n. So like this? def print_n(s,n): i = 0 while i < n: print s, i += 1 print_n('a',3) So this is basically making i bigger by +1 every time the while loop passes until it passes n, then it becomes false right? Also, with this exercise it’s using a doctest so I don’t actually call the function so I can’t figure out a way to make the string’s print on separate lines without changing the doctest code? Thanks for all of the help!

3 2

FASTA parsing, biological sequence analysis
by Danny Yoo March 31, 2014

March 31, 2014

Hi Jumana, Following up. Let's change the subject line. This makes it much easier for folks to see that this is a new topic of conversation. [Apologies to the others on the list for my last reply: I didn't realize that the subject was wrong, as well as the long quoted digest. I'll try to be more careful next time.] Jumana, I would strongly suggest separating string parsing issues from computational issues. The suggestion to use Biopython is twofold: not only do you get to avoid writing a FASTA parser, but it gets you in the right mindset of processing _multiple_ sequences. You are encountering this problem, as your comment suggests: > I wrote a program close to what Denis suggested , however it works only if I > have one sequence (one header and one sequence), I can not modify it to work > if I have several sequences (like above). You want the structure of your program to do an analysis on each biological sequence, rather than on just on each character of your sequence. ### ### pseudocode below: # ### from Bio import SeqIO import sys def doAnalysis(record): print("I see: ", record.id, record.seq) ## fill me in for record in SeqIO.parse(sys.stdin, 'fasta'): doAnalysis(record) ### And you can fill in the details of doAnalysis() so that it does the nucleotide counting and only needs to worry about the contents of the record's single sequence. In bioinformatics contexts, you must either deal with memory consumption, or use libraries that naturally lend to doing things in a memory-careful way, or else your computer will start swapping RAM. At least, unless your data sets are trivial, which I am guessing is not the case. In short, please use the BioPython library. It will handle a lot of issues that you are not considering, including memory consumption and correct, stream-oriented parsing of FASTA.

3 4

Re: [Tutor] while loop
by Scott Dunning March 31, 2014

March 31, 2014

On Mar 31, 2014, at 1:39 AM, Mark Lawrence <breamoreboy(a)yahoo.co.uk> wrote: > > They say that the truth hurts, so if that's the best you can come up with, I suggest you give up programming :( You’re in the TUTOR section. People in here are new to programming. I’ve only been doing this for a couple months and I just learned about while loops two days ago. If my questions are annoying you I suggest you not read them. : (

1 0

Re: [Tutor] while loop
by Scott Dunning March 31, 2014

March 31, 2014

On Mar 31, 2014, at 2:01 AM, Alan Gauld <alan.gauld(a)btinternet.com> wrote: > > Incidentally, your assignment does not appear to require > a while loop, just iteration? If thats the case you could > use a for loop instead and it would actually be more > suitable. Have you covered for loops yet? > No, we haven’t got to for loops yet, that’s why it needs to be done with a while for now.

1 0

Re: [Tutor] while loop
by Scott Dunning March 31, 2014

March 31, 2014

On Mar 30, 2014, at 4:29 AM, Dave Angel <davea(a)davea.name> wrote: > > > You're getting closer. Remember that the assignment shows your > function being called with 10, not zero. So you should have a > separate local variable, probably called I, which starts at > zero, and gets incremented each time. The exercise just asks to print (s), (n) times using iteration. The exersise is in a doctest which I didn’t really understand at first. So, I guess while I was doing it “correctly” it wasn’t what the exercise is asking for. This I guess is what the doctest is looking for. """Print the string `s`, `n` times. Parameters ---------- s -- A string n -- an integer, the number of times to print `s' Examples -------- >>> print_n("hello", 3) hello hello hello >>> print_n("bye", 0) >>> print_n("a", 6) a a a a a a """ > > The test in the while should be comparing them. > > Note that the number of times is specified in top level code, and > implemented in the function. You should not have a literal 10 in > the function. Without out a break or placing that 10 in there I can’t think of a way to have the while loop stop once it reaches (n). Any hints? SCott

3 2