🌐 Mailman 3 August 2017 - 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

Problems Plotting in 3D
by Kendall Evans Aug. 31, 2017

Aug. 31, 2017

Hi I am sorry but I am new to python and am having some problems plotting in 3D spherical coordinates I am calculating the youngs modulus for a crystal along all directions in space using the method below as I have been given the compliance matrices(C): Find S=inv(C) Modulus = S(1,1)^-1 Doing this for a 1 degree interval while sweeping through a 180 degree z axis rotation and a 360 degree x axis rotation Since I have to do matrix operations I believe I have to iterate across the theta and phi angles. I am wanting to iterate over these to get some radius and then plot this, however my result keeps giving me a blank plot [cid:image002.png@01D32274.B90EC520] [cid:image006.png@01D32274.B90EC520] Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10

2 1

easygui
by George Sconyers Aug. 29, 2017

Aug. 29, 2017

Hello all. Need some help with easygui which my son is trying to run for a book he is working in. Using Python 2.7 we downloaded easygui and put it in an executable path. Code is:import easyguieasygui.msgbox("Hello there") No popup occurs, cusor changes to a cross and no longer process mouse clicks. When we click on the bash shell the program terminates, cursor returns to normal, and the following error is delivered: script.py: line 2: syntax error near unexpected token '"Hello there"'script.py: line 2: 'easygui.msgbox("Hello there")' We also tried:import easyguimsgbox("Hello there") Returns the error message:script.py: line 2: syntax error near unexpected token '"Hello there"'script.py: line 2: 'msgbox("Hello there")' Checked on "easygui. sourceforge. net/tutorial.html#msgbox" and it appears I am using the correct syntax. Probably a stupid mistake but I am stumped. ThanksGeorge Sent from Yahoo Mail for iPhone

5 5

Best way to get root project directory in module search path
by boB Stepp Aug. 29, 2017

Aug. 29, 2017

SunOS 5.10, Python 2.4/2.6. Again, please forgive any typos as I am having to manually enter everything. I must confess that even though I've asked about similar topics in the past, I still don't think I'm fully "getting it". I have a project structure where I am developing various programs, some in Pinnacle HotScript language, some in Perl, some in Python, some shell scripts. For the purpose of this question, my simplified development file structure is: ~/_dev_Scripts /ScriptMenuSystem __init__.py test.py /py_utilities __init__.py test.py When I am fully happy (Not really! ~(:>)) ) with everything I will copy everything pertinent from "~_dev_Scripts" into a location like "/usr/local/.../Scripts/boB_Scripts". So all code must be able to handle any change in location from where I am developing it. On to my difficulties ... ScriptMenuSystem/test.py: ------------------------------------------------- #!/usr/bin/env python import sys sys.path.append('..') import py_utilities.test as t t.test_print() ------------------------------------------------- py_utilities/test.py: ------------------------------------------------- #!/usr/bin/env python def test_print(): print 'This is module test.py!' ------------------------------------------------- And when I run the first script from the ScriptMenuSystem location: > python test.py This is module test.py! So, this works, but seems clunky to me. I do not want to set PYTHONPATH as that would only help me, not the other people who will be using my programs. I have read of including a .pth file with a contained list of locations that should be part of the module search path, but is this the best way for my use case? And can it be written in such a way that I do not have to edit it when I copy and move the code to its new location? As I already have these empty __init__.py files, is there something I can add to these files to solve the situation and make the project root directory part of the module search path? TIA! -- boB

2 5

Need advice on testing python code.
by Anubhav Yadav Aug. 28, 2017

Aug. 28, 2017

Hello. I am a python developer and I write a lot of python code everyday. I try to do as much unit testing as possible. But I want to be better at it, I want to write more test cases, specially that rely on database insertions and reads and file io. Here are my use-cases for testing. How to test if things are going into the database properly or not? (mysql/mongo). I want to be able to create a test database environment as simple as possible. Create and delete the test environment before each functional test case is run. Sometimes I write code that read some data from some rabbitmq queue and do certain things. How can I write end to end functional test that creates a test rabbitmq environment (exchanges and queues) -> wait for sometime -> see if the intended work has been done -> delete the test environment. I want to be able to make sure that any new commit on my self hosted gitlab server should first run all functional test cases first before accepting the merge. Since we use lot of docker here to deploy modules to productions, I want to write functional test cases that test the whole system as a whole and see if things are happening the way they are supposed to happen or not. This means firing up lot of docker containers, lot of test databases with some data, and run all the test cases from an end user point of view. Can you suggest me the right python testing frameworks that I should be using? Right now I am using unittest to write test cases and manual if/else statements to run the functional test cases. I try to create rabbitmq queues and bind them to rabbitmq exchanges using the pika module. I then run the module using python -m moduleName and then sleep for sometime. Then I kill the processs (subprocess) and then I see if the intended consequences have happened or not. It's a pain in the ass to be doing so many things for test cases. I clearly need to learn how to do things better. Any suggestion/book/article/course/video will help me immensely in becoming a developer who writes better code with lot of test cases. Thanks for reading.

2 5

Re: [Tutor] easygui
by eric Aug. 27, 2017

Aug. 27, 2017

On 08/26/2017 07:07 PM, George Sconyers via Tutor wrote: > Hello all. Need some help with easygui which my son is trying to run for a book he is working in. Using Python 2.7 we downloaded easygui and put it in an executable path. > Code is:import easyguieasygui.msgbox("Hello there") > No popup occurs, cusor changes to a cross and no longer process mouse clicks. When we click on the bash shell the program terminates, cursor returns to normal, and the following error is delivered: > script.py: line 2: syntax error near unexpected token '"Hello there"'script.py: line 2: 'easygui.msgbox("Hello there")' > We also tried:import easyguimsgbox("Hello there") > Returns the error message:script.py: line 2: syntax error near unexpected token '"Hello there"'script.py: line 2: 'msgbox("Hello there")' > Checked on "easygui. sourceforge. net/tutorial.html#msgbox" and it appears I am using the correct syntax. Probably a stupid mistake but I am stumped. > ThanksGeorge > > Sent from Yahoo Mail for iPhone > _______________________________________________ > Tutor maillist - Tutor(a)python.org > To unsubscribe or change subscription options: > https://mail.python.org/mailman/listinfo/tutor > I tried it on Ubuntu 16.04 using python 2.7 and easygui version .96-3. It worked for me using the following code in idle but should also work in the python interpreter shell: Python 2.7.12 (default, Nov 19 2016, 06:48:10) [GCC 5.4.0 20160609] on linux2 Type "copyright", "credits" or "license()" for more information. >>> import easygui >>> easygui.msgbox("Hello There") 'OK' >>> A popup box came up and I could press OK in the box and the box would disappear. I wonder if you are running this in a text only environment and that is why the box is not showing up. I am still a newbie when it comes to programming but I am willing to help if I can. Good luck George, Eric

1 0

What exactly does the three dots do? Why such as thing?
by C W Aug. 27, 2017

Aug. 27, 2017

Dear Python experts, What exactly does the three dots do? > aList = ... > type(pList) ellipsis It's an ellipsis, a spot holder to later. But what data type is it: vector, matrix? In every other language, you initialize a variable you want to use. What's the point of ellipsis? Thanks!

5 9

How to use subprocess module to get current logged in user?
by boB Stepp Aug. 27, 2017

Aug. 27, 2017

SunOS 5.10, Python 2.4/2.6 I ask forgiveness in advance as I cannot copy and paste into an email what I am doing on this system. So I will have to manually type things, introducing the usual possibility of typos. My objective: Determine who the currently logged in user is and determine if that user is in my list of users that I have authorized to use my programs. I tried in the interpreter: ================================================================================================= py2> cmd = ['who', '-m'] py2> import subprocess as sp py2> p = sp.Popen(cmd, stdin=sp.PIPE, stdout=sp.PIPE, stderr=sp.PIPE) py2> out, err = p.communicate() py2> out '' py2> err "Must be attached to terminal for 'am I' option\n" py2> p = sp.Popen(cmd, shell=True, stdin=sp.PIPE, stdout=sp.PIPE, stderr=sp.PIPE) py2> out, err = p.communicate() py2> out 'rstepp ...' followed by all the other currently logged in users as if I had just typed 'who' in the terminal. ================================================================================================= What am I doing wrong? Why cannot I get the '-m' to be used? And is there an easier way to accomplish my objective? If I cannot work this out, then I will be forced to do: py2> import os py2> current_usr = os.popen('who -m') This should not be a security issue for me as no user input is involved. But I would rather use the subprocess module. TIA! -- boB

4 5

Does matplotlib.finance still work?
by C W Aug. 26, 2017

Aug. 26, 2017

Hello all, I have the following code, I get an error at the first line. from matplotlib.finance import quotes_historical_yahoo_ochl from datetime import date import pandas as pd today = date.today() start = date(today.year-1, today.month, today.day) quotes = quotes_historical_yahoo_ochl('APX', start, today) I have heard this package is either upgraded or replaced. If so, what do you recommend? Thanks!

3 5

When to use classes
by Steven D'Aprano Aug. 22, 2017

Aug. 22, 2017

Mostly for Bob, but also for anyone else interested: When To Use Classes http://kentsjohnson.com/stories/00014.html He says: You may have several functions that use the same state variables, either reading or writing them. You are passing a lot of parameters around. You have nested functions that have to forward their parameters to the functions they use. You are tempted to make some module variables to hold the state. You could make a class instead! Indeed you could, and sometimes you should, but we can see a problem here. The situation described is a bad situation to be in: there is too much coupling between functions, too much state being passed around. Ideally we should try to *reduce the coupling* between components, if possible, and hence make the program less complex. OO design tries to encapsulate the coupling within (hopefully) a single class, but it does nothing to reduce the coupling or complexity. So I would say: - if your code is complex, with lots of connections between components (coupling), try to reduce the coupling and make the code simper; - if you can't, encapsulate it in classes. -- Steve

8 18