[Tutor] Object creation query

All, I think I am asking for the impossible here. But I will ask anyway. I am using flask_sqlalchemy to build the tables and perform the queries, updates and insertions. I have multiple tables with the same structure with different names. A table called accounts which stores t

[Tutor] flask_sqlalchemy query in relation to SQL relationships.

All, Python 3.6 under windows 10 - I am using flask_sqlalchemy and finding it quite good with taking a lot of the heavy lifting of writing SQL statements. I have a question in relation to SQL relationships and how would this be done using SQL or flask_sqlalchemy or sqlalchemy. I have thre

[Tutor] Flask and flask_wtf issue -- I hpe someone can help.

All, Thanks to the starting point from Allan's chapter on web ffframeworks. I have now build quite a nice little app showing a bunch of records from a sqlite database in tables. The issue I am having is with flask_wtf and forms. I have a Selector HTML which I want to grab the selected item from

Re: [Tutor] Blockchain Dev with Python SDK

Matt, I would suggest you look at the links in the signature for this mailer for some good tutorials on OOPS. Datacamp also has some good tutorials. -Original Message- From: Tutor On Behalf Of Matthew Zand Sent: Monday, 15 July 2019 1:54 AM To: Tutor@python.org Subject: [Tutor] Blockchai

[Tutor] Web framework module for Python.

All, I am currently not sure where to start with my query. I have a SQLite3 database which currently is being accessed by python code. I am seeking a simple python module which would support a local web app in order to update and insert rows, and run reports . This web app I am creating

[Tutor] pointers or references to variables or sub-sets of variables query.

Hi all. In C, you can use pointers to reference variables, arrays, ETC. In python, I do not recall anything specifically that refers to such a capability. What I want to do is: I want to create different data structures such as dictionaries which contain specific list elements based upo

[Tutor] double nodes being enter into tree structure

Hello All, I am back!!! I forget which movie that comes from. Anyway, my issue is I am getting the same node being added to the parent node of my tree below. I have traced the code and do not understand why. This occurs when the loop which calls the addNode function has only looped once.

[Tutor] data structures general query

All, General computer science question for data structures. When would you use the below structures and why? If you can provide a real life example on when they would be used in a program This would be great. I am not after code, just explanation. Link lists Double link-lists Binary tre

Re: [Tutor] tree or link-list questions.

Allan, Once again, thanks for the help. I need to read more on OOPS it is all new and that was my first attempt. I looked at nesting Dictionaries and it got quite complex fast with the length of the strings and the path as you have outlined. I have parked that structure style for now. All these a

[Tutor] tree or link-list questions.

All, Windows 10, python 3.6. I am trying to create a data structure. I might be using the wrong term here, but I am calling it a hierarchical tree. The properties of the tree I am trying to create is: * A single root node * A node can only have a single parent. * A pare

Re: [Tutor] collections and mappings

Allan, I think I understand, but that type of maths I have not touched in 40 years. Thus why I am not getting the concept. 😊 It was an open question as I had no clue what it was and I should have asked. Lets park the question for now and I will read the references. As I am not sure if this will

[Tutor] collections and mappings

All, I have reviewed the collection module and do not understand mappings. I have seen this in other languages and have never got the concept. Can someone explain this at a very high level. ___ Tutor maillist - Tutor@python.org To unsubs

Re: [Tutor] word printing issue

Thanks, so much to learn. -Original Message- From: Tutor On Behalf Of Alan Gauld via Tutor Sent: Friday, 21 June 2019 2:26 AM To: tutor@python.org Subject: Re: [Tutor] word printing issue On 20/06/2019 11:44, mhysnm1...@gmail.com wrote: > I have a list of strings that I want to break th

[Tutor] word printing issue

All, I have a list of strings that I want to break them into separate words, and a combination of words then store them into a list. Example below of a string: "Hello Python team". The data structure: [ ['Hello'], ['Hello', 'Python'], ['Hello', 'Python', 'team'], ]'Python'], ]'P

Re: [Tutor] deleting elements out of a list.

Allan, I will respond to your reply in the other thread. As I want to respond to everyone in one email. Thanks for the clarification on the questions or information I did not provide. 101 troubleshooting assistance. Do not assume others know what you know. 😊 -Original Message- Fr

[Tutor] Follow-up on my removing elements from lists question.

This is a follow-up on my previous question for removing elements. Below is the code I am currently using. I am removing the elements at the end of the outer loop. The data structure goes along this: [ ['123123',[2019-2-18', 'transaction text', 'amount'], v ['123123',[2019-2-18', 'transac

[Tutor] Differences between while and for

All, In C, Perl and other languages. While only uses a conditional statement and for uses an iteration. In python while and for seems to be the same and I cannot see the difference. Python does not have an until (do while) where the test is done at the end of the loop. Permitting a once through

[Tutor] deleting elements out of a list.

All, I am not sure how to tackle this issue. I am using Windows 10 and Python 3.6 from Activestate. I have a list of x number of elements. Some of the elements are have similar words in them. For example: Dog food Pal Dog Food Pal qx1323 Cat food kitty Absolute cleaning inv123 Abs

[Tutor] regular expression query

Hello all, Windows 10 OS, Python 3.6 I have a couple of queries in relation to extracting content using regular expressions. I understand the pattern chars (.?*+), Meta-chars \d, \D, \W, \W and so on. The class structure [.]. The group I believe I understand (.). The repeat feature {m,n}.

Re: [Tutor] Interactive editing of variables.

Mike, Allan and Matt, Thanks for the information and help. I will check out Mike's code and have a play. Allan you provided some good resources and based upon what Matt stated before and using Easegui. This is not a path I can use. Thanks for the help anyway. Matt, a shame. I am not sure what can

Re: [Tutor] Interactive editing of variables.

Allan, That is what I have done before I went to bed. Installed ActiveState and using Python 3.6 as that is the release build they have up on their site. -Original Message- From: Tutor On Behalf Of Alan Gauld via Tutor Sent: Sunday, 2 June 2019 5:01 AM To: tutor@python.org Subject: R

Re: [Tutor] Interactive editing of variables.

As I thought. Easygui is not accessible at all with a screen reader due to the underlying graphic library. Win32 could work if I could load it. Since then I could use standard windows objects. Note, I didn't see anything in the quick scan I did ion the API. Very frustrating and disappointing.

Re: [Tutor] Interactive editing of variables.

Allen, As I am using Python 3.7 under windows. I have tried to use the win32gui, and Tkinter. Both generate the below errors and I cannot identify a module release to support the version of Python I am using. C:\Users\mhysn>pip install Tkinter graphic 948 Collecting Tkinter ERROR: Could not

[Tutor] Interactive editing of variables.

Hello all, Python 3.7, windows 10. I have no clue on how to achieve what I want to do and the code I have creates an hash. As shown below: for row in description: text = description_rejex(row) # applies a regular expression test function to remove text. Returns a list. if text

[Tutor] regular expressions query

All, Below I am just providing the example of what I want to achieve, not the original strings that I will be using the regular expression against. The original strings could have: "Hello world" "hello World everyone" "hello everyone" "hello world and friends" I have a string

Re: [Tutor] Finding unique strings.

Mark and all, Thanks for the link to the different dictionaries. The book which was recommended I have already got and read which doesn't answer my question. The structure of the CSV file is: Account no, date, transaction description (what I am trying to build unique keys from), credit, debit, se

[Tutor] Finding unique strings.

All, I have a list of strings which has been downloaded from my bank. I am trying to build a program to find the unique string patterns which I want to use with a dictionary. So I can group the different transactions together. Below are example unique strings which I have manually extracted fro

Re: [Tutor] How to get Selenium to wait for page load

Everyone, Thanks for the pointers. From: George Fischhof Sent: Saturday, 2 February 2019 2:42 AM To: mhysnm1...@gmail.com Cc: tutor@python.org Subject: Re: [Tutor] How to get Selenium to wait for page load mailto:mhysnm1...@gmail.com> > ezt írta (időpont: 2019. jan. 31., Cs 12:07

[Tutor] How to get Selenium to wait for page load

Hi all, I have found an excellent article on identifying stale elements. The issue is when I try and use their example code. I get a failure where for_wait is not defined. http://www.obeythetestinggoat.com/how-to-get-selenium-to-wait-for-page-load- after-a-click.html Traceback (most recent

Re: [Tutor] Web scraping using selenium and navigating nested dictionaries / lists.

Peter, I am aware that I am avoiding functions that can make my life easier. But I want to learn some of this data structure navigation concepts to improve my skills in programming. What you have provided I will review in depth and have a play with. A big thanks. -Original Message- From

Re: [Tutor] Web scraping using selenium and navigating nested dictionaries / lists.

Marco, Thanks. The reason for learning selenium is for the automation. As I want to test web sites for keyboard and mouse interaction and record the results. That at least is the long term goal. In the short term, I will have a look at your suggestion. From: Marco Mistroni Sent: Sun

[Tutor] Web scraping using selenium and navigating nested dictionaries / lists.

All, Goal of new project. I want to scrape all my books from Audible.com that I have purchased. Eventually I want to export this as a CSV file or maybe Json. I have not got that far yet. The reasoning behind this is to learn selenium for my work and get the list of books I have purchased. Ki

Re: [Tutor] exporting lists into CSV issue.

All, I have addressed the issue. When I open the file, I am using newline='' as one of the parameters. with open ('books-list.csv', 'w', newline='', encode='utf-8') as wf: I added the UTF-8 as I discovered after sending my original email I was not importing all the books. I discovered

[Tutor] exporting lists into CSV issue.

All, Thanks in advance for any assistance. This is a follow up msg from my iTunes import issue with the xml. I have managed to successfully import the data from the XML with Peter's and Alan's help. I have moved the information into a list and only extracting the data I want. Now I am trying to

Re: [Tutor] Importing XML files.

Peter and Alan, Peter, Thanks for the information. The library did the trick and I can get access to the XML content. Alan, thanks for the explanation of the tree structure. I was aware of this already for HTML and XML. Just didn't understand the terminology used from the XML library. The tuto

[Tutor] Importing XML files.

All, I am trying to import ITunes XML files. I have been doing some reading and I am somewhat confused with some XML terminology. What is: Tag – I think it is the in the itunes library file. Text = The text between the Attrib -- don’t know. If I am correct in my thinking. If y

Re: [Tutor] Debugging a sort error.

Peter, Thanks for the code for a custom key. That will come in handy later down the track. -Original Message- From: Tutor On Behalf Of Peter Otten Sent: Sunday, 13 January 2019 10:00 PM To: tutor@python.org Subject: Re: [Tutor] Debugging a sort error. mhysnm1...@gmail.com wrote: > Issu

Re: [Tutor] Debugging a sort error.

All, Once again thanks for all the suggestions. It was the input data after all. As I am importing three sheets into python. One of the sheets had one less column. Thus how I ended up with float points. The testing for the string helped here greatly. Now things are correct again. On and forwa

Re: [Tutor] Debugging a sort error.

Everyone, I did find out the issue. When looking at the output in a spreadsheet. I was inserting floats into the description dictionary from the code I was using to extract the data. Thus I have gone back to the drawing board. Rather than extracting by columns which became difficult to achieve

[Tutor] Debugging a sort error.

Hello everyone. I am hoping someone can help with the below error using Python3.5 in the Windows 10 bash environment. I found the below link which I am not sure if this is related to the issue or not. As I don't fully understand the answer. https://github.com/SethMMorton/natsort/issues/7 I

[Tutor] Data pattern query.

All, I am currently writing a Python program to identify common text patterns in a excel spreadsheet which I have imported using openpyxl. All the descriptions of the transactions are in a single column. I am trying to work out the easiest method of identifying the same pattern of text in th