🌐 Mailman 3 October 2019 - 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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Appreciating the time and effort
by Joseph John Oct. 27, 2019

Oct. 27, 2019

Hi, Good morning I am member of the mailing list, but not active. When I check tutor mailing list, I see so many active members traying to clear the doubt and helping others Like to give a big thanks to all those posts I really appreciate the way you are helping other through this mailing list 0 Thanks Joseph John

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GC content: Help with if/else statements:
by Mihir Kharate Oct. 26, 2019

Oct. 26, 2019

Hi, Following is part of the code I am working on in Python3. I am trying to calculate the GC content of the input DNA sequence. I want the function to return "Invalid base-pair in your sequence" if the input sequence has letters other than A, T, G and C. ###################################################### input_sequence = input("Input your sequence here: ") input_sequence = input_sequence.upper() print("\nYour sequence is: " + input_sequence) print("\n") a=t=g=c=0 def gc_content(): global a,g,t,c for character in input_sequence: if character == 'G': g+=1 if character == 'C': c+=1 if character == 'T': t+=1 if character == 'A': a+=1 gc_cont = (g+c)/(a+g+t+c)*100 if character == 'A' or 'T' or 'G' or 'C': print ("The GC content is: " + str(gc_cont) + " %") else : print("Invalid base-pair in your Sequence") gc_content() ############################################ *Question 1*: When I use the else statement as I have in the code above, it is ineffective. Even if I input other letters in my input sequence, it still returns the GC content. *Question 2*: When I use another if statement like below, it returns the GC content and "Invalid base-pair in your Sequence" both. No matter whether the input has any other characters than A,T,G,C or not. if character == 'A' or 'T' or 'G' or 'C': print ("The GC content is: " + str(gc_cont) + " %") if character is not 'A' or 'T' or 'G' or 'C': print("Invalid base-pair in your Sequence") *Question 3*: How do I fix this? Thank you for any suggestions and help! ~Mihir

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Pass arguments from bash script to embedded python script
by Stephen P. Molnar Oct. 25, 2019

Oct. 25, 2019

First of all, let me emphasize that this is not a homework assignment. I have a large number of data files form a Quantum Chemistry program which all have the same format. I have written a short python script to extract the data required for another program. > #!/usr/bin/env python3 > # -*- coding: utf-8 -*- > """ > > Created on Tue Sep 24 07:51:11 2019 > > """"" > import numpy as np > > data = np.genfromtxt(fname, usecols=(1), skip_header=27, > skip_footer=1, encoding=None) > > print(data) > > np.savetxt('fname.dG', data, fmt='%.10g', header='fname1') > print(data) and I have a bash script in which I have embedded the python script: > #!/bin/bash > > # Run.dG.list_1 > > while IFS= read -r d > do > python3 DeltaGTable_V_sw.py > done <ligand.list The ligand.list for the bash file have the format: > >> fname = ['C-VX3.log', '15-7.log', '14-7.log'] >> fname1 = ['C-VX3', '15-7', '14-7' where fname and fname1 are three typical data files. my problem is how do I pass the argument's in the two files from the bash script to the python script? It has been suggested to me that the solution is an implementation of the sys/.argv function but it seems that every reference that I can find goes the other way from python to bash. So my question is what question should I be goggling? I am not looking for someone to write the script for me, but pointers in the correct direction. Thanks in advance. -- Stephen P. Molnar, Ph.D. www.molecular-modeling.net 614.312.7528 (c) Skype: smolnar1

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How can one know if a Python behavior is meant to be a maintained feature or just an implementation artifact?
by boB Stepp Oct. 25, 2019

Oct. 25, 2019

I was at https://realpython.com/python-zip-function/ and read, "In Python 3.6 and beyond, dictionaries are ordered collections, meaning they keep their elements in the same order in which they were introduced. If you take advantage of this feature, then you can use the Python zip() function to iterate through multiple dictionaries in a safe and coherent way: ..." This immediately raised the question in my mind: How can I _know_ that I can rely on dictionary elements being ordered in all future versions of Python >= 3.6? And more generally, how can I tell when a consistent behavior is simply an implementation artifact or if it is an actual feature meant to be maintained in all future Python versions? -- boB

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Re: [Tutor] Running multiple python scripts from one python scripts
by Alan Gauld Oct. 25, 2019

Oct. 25, 2019

On 25 October 2019, at 14:48, ose micah <osaosemwe(a)yahoo.com> wrote: > dynamically creates python scripts on the fly (from live feeds), I'm not sure what you mean by live feeds but can you explain what different kinds of scripts you produce for the first case "delete_line3.py"? Based on the name it doesn't sound too dynamic in nature? Could it not be turned into a function driven by some parameters? > This newly created scripts, must be deployed in less than 2 mins max, but, cannot be deployed simultaneously, By deployed I assume you mean executed? If so executing the code directly will be much, much, faster than spinning up a subprocess or two for each task. ># create script1 > >with open (/tmp/delete_line3.py, 'w+' ) > >... > This is the bit that is puzzling me. Why must this be dynamically created? What prevents it from being prewritten code? >extProc1 = sp.Popen([sys.executable, '/tmp/delete_line3.py'], stdout=sp.PIPE) > If you must execute dynamically created python code files then using exec(open(fn).read()) is probably preferable to starting a subprocess.

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Re: [Tutor] Running multiple python scripts from one python scripts
by Alan Gauld Oct. 25, 2019

Oct. 25, 2019

On 25 October 2019, at 07:46, ose micah via Tutor <tutor(a)python.org> wrote: >That was my very first deployment. Calling the scripts and running them. But, that would not work in my use case. As some of the scripts are been formed in the main scripts. Are you saying that you have a python program somewhere that is generating python code and you are then, in this program, running those dynamically created scripts? If so, there is almost certainly a better way of doing things by creating permanent scripts and passing parameters and data to them. Perhaps if we knew more about these script creation programs we could offer a cleaner solution. Executing dynamically created code via os.system or subprocess is a big security hole but, if it's python code, you might as well use the exec function which is just as big a hole, but more efficient! One of the biggest issues with this kind of approach is the invisibility of any output, you need to rely on shared knowledge of output files or data tables. That implies a lot of checking to make sure that they exist before every access and that they are new versions and you are not reprocessing old data. It all gets very messy in any kind of real world environment. Alan g.

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i need help with my python code.
by Deep Patel Oct. 25, 2019

Oct. 25, 2019

hi my name is deep patel. i need help with my python code that i made.i am unable to get the picture on my window. and when i try to run my customer.py it doesn't run and shows me error message for PIL method. i did instal a PIL module but still i don't get it what wrong with my code. can you please help me out with checking my code. i am gonna attach my pdf files that has instruction in it and also my image and my python code. if you need any more information please let me know. thanks

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Re: [Tutor] Single char input
by Alan Gauld Oct. 25, 2019

Oct. 25, 2019

On 25 October 2019, at 01:06, Mats Wichmann <mats(a)wichmann.us> wrote: >As you'll have seen by the other answers it's quite a bit harder on >non-Windows platforms. To be fair, if you can use curses, and most unlike OS support it, then it's almost as easy. Just use the getchar function after initializing the screen (and you should probably reset the screen afterwards too.) Alan g

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Re: [Tutor] Running multiple python scripts from one python scripts
by Alan Gauld Oct. 25, 2019

Oct. 25, 2019

On 24 October 2019, at 19:23, ose micah <osaosemwe(a)yahoo.com> wrote: >Hello Alan, Hello. But I should point out that you are sending these emails to the entire tutor mailing list - currently about 430 members - not just me! > >I > ># running the scripts in processes > >extProc1 = sp.Popen([sys.executable, '/tmp/delete_line3.py'], stdout=sp.PIPE) > >time.sleep(5) You are doing something incredibly weird here. Why do you not run the python code directly within your program? Just import the file as a module and call it as needed. This is much simpler and an order of magnitude faster and more efficient. eg: import mymodule mymodule.main(). That's precisely what Python's import module system is for. All you need to do is follow standard python practice of putting your module code inside a function. At the end of the module out the usual python mantra If __name__ == "__main__" : main(), If you also want to use the script as a stand alone program. If the function takes arguments then extract them from sys.argv in the if name clause and make main take an argument. Then in your code it becomes Import mymodule mymodule.main(argument) It's so much simpler and more powerful than messing about with subprocesses and os.system. Alan g.

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