🌐 Mailman 3 December 2015 - 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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Desktop Notifications on Linux
by Dharmit Shah June 29, 2017

June 29, 2017

Hi all, I am trying to create a script that will go through the /var/log/secure file on a Linux system and provide desktop notifications for failed login attempts. Here is the code - http://pastebin.com/MXP8Yd91 And here's notification.py - http://pastebin.com/BhsSTP6H I am facing issue in the function "new_attempts_from_last". I am not able to raise a desktop notification from this function. It always fails with this traceback - http://pastebin.com/cgHMScv3 I see this error only when I try to raise a notification from the aforementioned function. If I run test examples under /usr/share/doc/notify-python/examples, it works just fine. Also, if I try to raise a notification from under if __name__ == "__main__":, it works without any issues. So I don't think there's any issue with OS's notification daemon. Running from python shell like below also works fine: In [1]: import notification In [2]: notification.notification("Hey") What am I missing or doing wrong here? If it matters, I am running Fedora 20, python 2.7 and Cinnamon desktop environment. For readability purposes, I have provided pastebin links. Let me know if this is not the correct way. Regards, Dharmit.

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Option on How to create web Interface
by fabu desay March 9, 2016

March 9, 2016

If I got the problem correctly,you can equally create + open a file file = open(filename,+wr) The file should have the HTML extension You can now pace your web contents in the file.html you created that should work by trigering the python file you programed in and it inturn creates the website or pages of your choice an example like this could help webpage = open('index.html', 'w+') webpage.write("<html><head><title>My web page</title></head>"); webpage.write("<body>This the body</body></html>"); webpage.close()

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Missing Standard Libraries on Python 3.5 for Mac
by Andrew Machen Feb. 29, 2016

Feb. 29, 2016

Hi, I am new to Python, and I am trying to use a Python Standard Library, namely ‘unicodedata’, however it appears to be missing (others are also missing) from the built-in libraries that come with Python 3.5 for Mac. I have searched the following directory, but have not found the library: /Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5 I have tried reinstalling Python 3.5 and also tried Python 3.4.3, and neither install the ‘unicodedata’ library. Is there anyway to install it manually? The library is present in the Python 2.7 version provided by Apple, however I was hoping to learn and use Python 3. The library is present in the Linux version of Python 3.5 that I have tried. Your help is greatly appreciated. -Andrew

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reading an input stream
by richard kappler Jan. 7, 2016

Jan. 7, 2016

I have to create a script that reads xml data over a tcp socket, parses it and outputs it to console. Not so bad, most of which I already know how to do. I know how to set up the socket, though I am using a file for development and testing, am using lxml and have created an xslt that does what I want with the xml, and it outputs it to console. What I'm not really sure of, each xml 'message' is preceeded by an STX (\x02) and ends with an ETX (\x03). These 'messages' (Danny, are you noting I don't say -lines- anymore? :-) ) need to be parsed and output whole as opposed to partial. My concern is, there will actually be numerous machines sending data to the tcp socket, so it's entirely likely the messages will come in fragmented and the fragments will need to be held until complete so they can be sent on whole to the parser. While this is the job of tcp, my script needs to I think what I need to do would be analogous to (pardon if I'm using the wrong terminology, at this poing in the discussion I am officially out of my depth) sending the input stream to a buffer(s) until the ETX for that message comes in, shoot the buffer contents to the parser while accepting the next STX + message fragment into the buffer, or something analogous. Any guidance here? And Merry Christmas / Happy Holidays / Festive whatever you celebrate!!! regards, Richard -- "I want to makes shoes!" -> elf fleeing the fire engulfed Keebler Tree

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trouble with beautiful soup
by marcus lütolf Jan. 2, 2016

Jan. 2, 2016

dear pythonistas, for hours I'am traying to use Beautiful Soup for scraping some websites as an exercise. But each time I run the code below: >>> import urllib >>> from BeautifulSpoup import * >>> url = raw_input( 'Enter -') >>> html = urllib.urlopen(url).read() >>> soup = BeautifulSoup(html) >>> print soup I am getting the following trace back without beeing prompted for an input: Traceback (most recent call last): File "C:/Python27/Beautiful Soup_ex1.py", line 2, in <module> from beautifulspoup import * ImportError: No module named beautifulspoup I have installed and unzipped etc. the latest file from www.crummy.com many times. If I click setup.py the command window appears only a fraction of a second. ?????? Happy holidays and thanks for help, Marcus. --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. https://www.avast.com/antivirus

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OT: How best to use Git for multi-directory projects?
by boB Stepp Jan. 1, 2016

Jan. 1, 2016

I have two situations that I wish to use Git for: 1) Multi-directory Python projects and 2) learning Python from various books which inevitably have suggested exercises to program solutions for. For (1) I might have multiple projects going simultaneously. Say something like: project1/ ....source/ ....tests/ ....data/ ....etc project2/ ....etc projectn/ ....etc My thoughts are that each project should have its own .git file. If this is correct, then I further think that there should be a single .git file to track everything in each project folder at its top level and use git add . at the project folder level to add anything that has been added anywhere in any subfolder of the project folder. Am I thinking correctly in this? For (2) I first want to state publicly: New Year's Resolution: I WILL study--in parallel--the following three books from cover to cover, doing ALL non-trivial exercises: "Think Python, 2nd Edition" by Allen Downey "Introduction to Computation and Programming Using Python, Revised and Expanded Edition" by John V. Guttag "Python Crash Course" by Eric Matthes I hope that by saying this openly I will actually DO what I mean to do! I am tired of "Easter-egging" Python, able to use lots of different features, but with no thorough understanding/mastery of anything. The first two books are to get down basic intro to CSc topics which have probably evolved since the mid- to late-seventies when I took my basic CSc courses, while the third hopefully will fill in Python language features and syntax that the first two books skip. But to the questions. This seems essentially parallel to (1) in regards to using Git. I want to track all of the programming work I do for these 3 books. I anticipate a directory structure similar to: StudyBooks/ Book1/ Ch1/ example1.py example2.py exercise1.py etc Ch2/ etc Book2/ etc. Since I will be studying these 3 books in parallel, would it make sense to track everything with a single .git file at the level of StudyBooks directory? Hoping to more effectively use Git in the new year! -- boB

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How to plot amount of lines but the amount is a input
by Tom Xu Dec. 30, 2015

Dec. 30, 2015

Dear Pythoneers, I want to draw several curves in one graph, but the amount of curves is not a fixed number. My homework is below: --- import matplotlib.pyplot as plt import math if __name__=='__main__': try: n=int(input('how many curves? ')) ulist=[] thetalist=[] for i in range(n): ulist.append(float(input('Enter velocity: '))) thetalist.append(float(input('Enter angle: '))) except ValueError: print('invalid input') else: generateFr(?????) def generateFr(u, theta): theta=math.radians(theta) g=9.8 tflight=2*u*math.sin(theta)/g intervals=frange(0, tflight, 0.001) x=[] y=[] for t in intervals: x.append(u*math.cos(theta)*t) y.append(u*math.sin(theta)*t - 0.5*g*t*t) drawgraph(x, y) def frange(start, final, increment): numbers=[] while start<final: numbers.append(start) start+=increment return numbers def drawgraph(x, y): plt.plot(x, y) plt.xlabel('x-coordinate') plt.ylabel('y-coordinate') plt.title('Projectile motion')

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MemoryError
by Satya Luzy Dec. 30, 2015

Dec. 30, 2015

Hello, I am currently working on a program to find the prime factor of n, in which n is a big integer. Using the Continued Fraction factorization method (I will provide the source code below, please don't mind the variables). It works perfectly when factorizing below 10 digits numbers. In my code below you will see on how I tried to factorize 94152743499601547, but get this message instead : --------------------------------------------------------------------------------------------------------------------- *Traceback (most recent call last):* * File "C:/Users/Satya/PycharmProjects/untitled2/fact.py", line 94, in <module>* * faktorisasi(n)* * File "C:/Users/Satya/PycharmProjects/untitled2/fact.py", line 92, in faktorisasi* * faktorisasi_default(n,j,boundary)* * File "C:/Users/Satya/PycharmProjects/untitled2/fact.py", line 55, in faktorisasi_default* * Q.append(((n*kelipatan)-(p[i]**2))/Q[i-1])* *MemoryError* *Process finished with exit code 1* -------------------------------------------------------------------------------------------------------------------- It has undergone the boundary value of 51200 and j value of 12. It has been running for more than 5 hours before it suddenly stop. Please let me know how to fix the memory error, Thanks before. Sincerely. -------------------------------------------------------------------------------------------------------------------- [CODE] import fractions import math n = 94152743499601547 #untuk difaktorkan flag = True faktor_1 = 1 #deklarasi asal faktor_2 = 1 # CFRAC def cfract(n,boundary): coeff = 1 floor_part = floor_ = math.floor(math.sqrt(n)) denom = n - floor_part ** 2 result = [] result.append(int(floor_)) if float(denom)!=0: for i in range(boundary-1): try: floor_ = math.floor((math.sqrt(n) + floor_part) / float(denom)) except ZeroDivisionError: # perfect square return result if denom != 1: result.append(int(floor_)) floor_part = denom * floor_ - floor_part coeff = denom denom = n - floor_part ** 2 common_div = fractions.gcd(coeff, denom) coeff /= common_div denom /= common_div if denom == 1: result.append(int(floor_part + result[0])) return result def faktorisasi_default(n,kelipatan,boundary): global faktor_1,faktor_2,flag q = cfract(n*kelipatan,boundary) p = [] Q = [] A = [] p.append(0) p.append(q[0]) Q.append(1) A.append(0) A.append(1) A.append(q[0]) Q.append(((n*kelipatan)-(p[1]**2))/Q[0]) # i = 2 for i in range(2,len(q)): p.append((q[i-1]*Q[i-1])-p[i-1]) Q.append(((n*kelipatan)-(p[i]**2))/Q[i-1]) A.append((q[i-1]*A[i]+A[i-1])%(n*kelipatan)) #tabel sudah selesai temp = 0 # nilai Q yg ganda temp2 = 0 tempA1 = 0 # nilai A dari Q1 tempA2 = 0 # nilai A dari Q2 for i in range(0,len(Q)): for j in range(i+1,len(Q)): if flag and Q[i]==Q[j]: print Q[i] print Q[j] temp = Q[i] tempA1 = A[i+1] tempA2 = A[j+1] temp2 = tempA1*tempA2 % n # nilai base if temp2 > Q[i]: faktor_1 = int(fractions.gcd(temp2+temp,n)) faktor_2 = int(fractions.gcd(temp2-temp,n)) if faktor_1 != 1 and faktor_2 != 1: flag = False def faktorisasi(n): global flag j=1 #kelipatan boundary=50 #iterasi CFRAC faktorisasi_default(n,j,boundary) while (flag): j+=1 boundary*=2 print "Nilai boundary : %d" %boundary print "Nilai j : %d" %j faktorisasi_default(n,j,boundary) faktorisasi(n) print faktor_1 print faktor_2

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Re: [Tutor] Python trouble (Nathan Clark)
by Ricardo Martínez Dec. 29, 2015

Dec. 29, 2015

Hi, the problem is in the line that says: terms = int(input("How many terms of the fibonnaci sequence would you like?") is missing a closing ')' take a look: terms = int(input("How many terms of the fibonnaci sequence would you like?")) Hope you help.

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