Python Courses, Training, and Tutorials

I am building a website where I have a need that user should be able to evaluate some expression ba… Read more How Safe Is Expression Evaluation Using Eval?

I'm looking for the most efficient way of finding the intersection of two different-sized matri… Read more Finding Intersection Of Two Matrices In Python Within A Tolerance?

The following PyGTK code displays a PNG file in a window. Is there a simpler or better way of displ… Read more In Pygtk, What Is A Simple Way To Show A Png File?

I've got an application which takes advantage of a number of features of the Twitter API. I'… Read more 401 Error Using The Streaming Features Of Twitter Api (through Tweepy)

I have a python program that craetes a png file with a circle on it. Now I want this circle to be s… Read more Adding A Transparent Circle To An Image On Python With Pil

I have got a PyQT widget interpreter working, the code picked up from here is as follows: import … Read more Enabling Code Completion In An Embedded Python Interpreter

While importing tensorflow i'm getting an error: import tensorflow Traceback (most recent call … Read more Importerror Importing Tensorflow

In Flask(or werkzeug), how can I get the view function when all I have is the Rule? (or the Endpoin… Read more How Can I Get The View Function From An Endpoint/rule?

Say I open a terminal emulator in Emacs with M-x ansi-term. This opens a buffer in Emacs with the s… Read more Sending Code From Python Buffer To Ipython Session Running From M-x Ansi-term

I have a text file, which has the following, contents: joe satriani is god steve vai is god steve … Read more Writing To A File Which Is Open In Read And Write Mode Altering The Structure

Anybody have any insight into controlling turtle graphics in python 2.7 with keyboard commands? I h… Read more Python Turtle Graphics Keyboard Commands

I have a menu (main_menu), that has a Button and I want this button to stay in the middle after I r… Read more How To Resize Button After Resizing Pygame Window?

I am solving a problem with genetic algorithm in python 3. I have not completed the full code yet. … Read more Typeerror: '<' Not Supported Between Instances Python

Per PEP-492 I am trying to implement an asynchronous iterator, such that I can do e.g. async for f… Read more Implementing An Asynchronous Iterator

Can someone please tell me what is wrong with this code? I keep on getting a NoneType error. I am t… Read more Attributeerror: 'nonetype' Object Has No Attribute 'ravel'

I have this code: class Main(QWidget): def __init__(self): super().__init__() s… Read more Simplify My Code, One Function To Create Is Used By Other Functions

Just want to ask how do i swap the list at the index with the list that follows it and if the list … Read more Swapping List With Index

I stumbled upon this behavior for double underscore name that I don't understand: class A: … Read more How Is __mro__ Different From Other Double Underscore Names?

I'm nearly finished with this program, but I can't get the output quite how I want it. Here… Read more Specific Column Widths And Alignment With Savetxt

I've created a script in python to parse different links from a webpage. There are two section … Read more Unable To Scrape Similar Links From Different Depth Out Of A Webpage

I am working in jupyter notebook and have a pandas dataframe 'data': Question_ID | Custome… Read more Python Pandas Dataframe Words In Context: Get 3 Words Before And After

def get_books_by_query_params(context, query, query_parameters): binding_query = query_parameters[&… Read more Which Attribute Of Searchqueryset Has The Same Function As Prefetch_related?

I am training a neural network with keras, and since my dataset is very large I am using fit_genera… Read more Runtimeerror: The Session Graph Is Empty. Add Operations To The Graph Before Calling Run()

I have this pandas DataFrame: df = pd.DataFrame( data=[ ['yes', 'no', n… Read more How To Get The Frequency Of A Specific Value In Each Row Of Pandas Dataframe

My dataset is as follows: G R Y 1 1 0 1 2 1 1 3 2 1 4 4 1 5 2 2 1 1 2 2 2 2 3 3 2 4 2 3 1 0 3 2 1 3… Read more How To Plot The Piecewise Continuous Points In Matplotlib

I have written a poker simulator that calculates the probability to win in texas holdem by running … Read more How To Speed Up Monte Carlo Simulation In Python

Is there a better way to get the full url in django than doing the following: url = request.META[&#… Read more How To Get Full Url From Django Request

I have a Python program that consists of several modules. The 'main' module creates a file … Read more Where To Store A Log File Name In Python?

I have sorted the dataframe and now I would like to create this table: Sample of data: df4 = {'… Read more How To Create This Table From Sorted Dataframe?

Follow-up from this question - Xpath. How to select all text between two tags? I can get text from … Read more Get All Intersections Of Two Sets On The Page Using Xpath

I am trying to accept a capture group only if the pattern matches and there is not a specific word … Read more Fixing Negative Assertion For End Of String

I tried to capture (stereo) images with Python's opencv and two cameras so therefore every 5 se… Read more Cv2.videocapture.read() Gets Old Frame After Time.sleep()

Let me start by saying, that I don't think there is a way to do this... but, there are a lot o… Read more Conditional Pip Install Requirements On Heroku For Django App

In Python we can assign a function to a variable. For example, the math.sine function: sin = math.s… Read more Assign Multiple Functions To A Single Variable?

I am trying to calculate some values of satellites, the data-generation takes quite long so I want … Read more How Do I Pickle Pyephem Objects For Multiprocessing?

I have been learning the Django tutorial for a few weeks using YT, StackOverflow, Django documentat… Read more How Can I Update First_name, Last_name & Email Of Django Model User And Update Other Field In Separate Models

From this context: import itertools lines = itertools.cycle(open('filename')) I'm wond… Read more Re-reading File When Cycling Over A File Object In Python

I want to train a lgb model with custom metric : f1_score with weighted average. I went through the… Read more F1_score Metric In Lightgbm

I have an array A that has shape (480, 640, 3), and an array B with shape (480, 640). How can I app… Read more Append 2d Array To 3d Array, Extending Third Dimension

I am trying to run an executable file (a linear programming solver CLP.exe) from Python 3.5. Impo… Read more Error Of Running An Executable File From Python Subprosess

Say I have a bivariate function, for example: z = x^2 + y^2. I learned that on Keras I can compute … Read more Derivatives Of N-dimensional Function In Keras

I have a question about name clashes in python. If I have something like: class A: a='a' cl… Read more Python Multiple Inheritance Name Clashes

Hi i am trying to fix this issue when i run python3 brain.py below i get this error Illegal instruc… Read more How To Fix Illegal Instruction (core Dumped)

I have been struggling to get Django up and running. I used pip to install Django version 1.10.4 an… Read more Django Installation On Ms Windows, Manage.py "couldn't Import Django"

I'm toying around with BeautilfulSoup and I'm looking for a way to get a specific json stri… Read more Beautifulsoup - Extract Specific Json Key-value From Js

I'm wondering about the best way to find all the intersection points (to roundoff error) betwee… Read more How To Find All The Intersection Points Between Two Contour-set In An Efficient Way

I'm a newbie trying out ML/DBN in Python (3.4) under PyCharm (Comm.Ed 4.5). The following defin… Read more Pycharm Type Error Message

This is follow up to this question - 2d list in python The answer by @Kroolik addresses my issue, b… Read more Python - Skipping Lines While Using Csv.dictreader

new in python. I have python 2.7. I just installed a new module (beatifulsoup) from cmd in windows… Read more Cannot Import Name Module With Module Correctly Installed

I have the following models class Destination_Deal(models.Model): name = models.CharField(_(&#… Read more Django, Filter By Specified Month And Year In Date Range

Hello I am trying to log in automatically with webdriver to this webpage : https://www.oddsportal.c… Read more How To Log In With Selenium Webdriver

I am fairly new to python, this is my first real project and I have come to a roadblock. What I hav… Read more Using Ffprobe Within A Python Script

I'm trying to create a little job board, each job card is dynamically inserted from flask from … Read more Sending Flask Variable From Html Back To Flask With Url_for()

According to the answer to question, I installed readline for python to resolve backspace issue. If… Read more How To Set Configuration For Readline In Python

I have a color photo of apple, how can I show only its outline (inside white, background black) wit… Read more Image Outline Using Python/pil

I am trying to fit Brillouin Spectra (with several peaks) using scipy.optimize.curve_fit. I have h… Read more Fitting Multiple Lorentzians To Brillouin Spectrum Using Scipy In Python 3

How can I update the canvas from a function called by a button? Here's my code: from Tkinter im… Read more Tkinter: Access Canvas From Button Handler